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accuracy and
EXPERIMENT: MICROSD CARD POWER CONSUMPTION & SPISEE MORE ONGOUGHLUI.COM
REVIEW: ASTROLUX 3.7V LI-ION CELLS (18650/3000MAH, 21700SEE MORE ONGOUGHLUI.COM
FAIL, TEARDOWN: WD ELEMENTS SE 4TB 2.5″ USB 3.0 HARD DRIVESEE MOREON GOUGHLUI.COM
PROJECT: PAEANSONIC CF210SP CD9088+CD7642 AM/FM RADIO KITSEE MORE ONGOUGHLUI.COM
PROJECT: “GENERIC” ZM-4 AT89C2051 4-DIGIT 7-SEGMENT LEDSEE MORE ONGOUGHLUI.COM
TEARDOWN: GLADE SENSE & SPRAY AUTOMATIC AIR FRESHENER (SCJ Sometimes, it seems the posts around here have no rhyme or reason, and that’s exactly the way I like it. As a part of a sampling “club”, a while back, I received a Glade Sense and Spray Automatic Air Freshener.This rather interesting device claims to have “motion sensor technology”, featuring a small refill that lasts about a month.. Having tried mine, and emptied the refill, I TEARDOWN: PHILIPS BDP2180/79 3D BLU-RAY PLAYER WITH STUCK At the time, there were a few units, but the Philips BDP2180/79 was the cheapest at AU$89, which was pretty much the same price as most regular Blu-ray players. Since the initial first few weeks, the unit’s not seen much action as watching things on a TV (centrally located) has fallen out of favour to watching video on a personaldevice (be
QUICK TEARDOWN, PAIRING: J.BURROWS WIRELESS 2.4GHZ USB The instructions which worked were for the K-Mart OfficeOne Wireless Desktop Mouse and Keyboard set. The procedure for the mouse is to press and hold the scroll wheel and right click button simultaneously for a few seconds. For the keyboard, it is to hold the ESC and K key for a few seconds. It worked with the red LED on the keyboard turningsolid.
FAILED, TEARDOWN: COWIN E7 PRO ACTIVE NOISE CANCELLING Whatever the cause may be, unfortunately, this makes the E7 Pro unserviceable, as the ear-cup likes to plop out, hence the teardown which seems to have discovered a slight battery capacity discrepancy as well. Unfortunately, with the way that Cowin products have served me, I cannot really recommend them as much as before having bothfailed me
TUTORIAL: INTRODUCTION TO SCPI AUTOMATION OF TEST Tutorial: Introduction to SCPI Automation of Test Equipment with pyvisa. Posted on March 28, 2021 by lui_gough. When it comes to running scientific experiments, your test equipment are your “eyes and ears” measuring the quantities you are trying to observe. A lot of the time, purchasers tend to focus on specifications such asaccuracy and
EXPERIMENT: MICROSD CARD POWER CONSUMPTION & SPISEE MORE ONGOUGHLUI.COM
REVIEW: ASTROLUX 3.7V LI-ION CELLS (18650/3000MAH, 21700SEE MORE ONGOUGHLUI.COM
FAIL, TEARDOWN: WD ELEMENTS SE 4TB 2.5″ USB 3.0 HARD DRIVESEE MOREON GOUGHLUI.COM
PROJECT: PAEANSONIC CF210SP CD9088+CD7642 AM/FM RADIO KITSEE MORE ONGOUGHLUI.COM
PROJECT: “GENERIC” ZM-4 AT89C2051 4-DIGIT 7-SEGMENT LEDSEE MORE ONGOUGHLUI.COM
TEARDOWN: GLADE SENSE & SPRAY AUTOMATIC AIR FRESHENER (SCJ Sometimes, it seems the posts around here have no rhyme or reason, and that’s exactly the way I like it. As a part of a sampling “club”, a while back, I received a Glade Sense and Spray Automatic Air Freshener.This rather interesting device claims to have “motion sensor technology”, featuring a small refill that lasts about a month.. Having tried mine, and emptied the refill, I TEARDOWN: PHILIPS BDP2180/79 3D BLU-RAY PLAYER WITH STUCK At the time, there were a few units, but the Philips BDP2180/79 was the cheapest at AU$89, which was pretty much the same price as most regular Blu-ray players. Since the initial first few weeks, the unit’s not seen much action as watching things on a TV (centrally located) has fallen out of favour to watching video on a personaldevice (be
QUICK TEARDOWN, PAIRING: J.BURROWS WIRELESS 2.4GHZ USB The instructions which worked were for the K-Mart OfficeOne Wireless Desktop Mouse and Keyboard set. The procedure for the mouse is to press and hold the scroll wheel and right click button simultaneously for a few seconds. For the keyboard, it is to hold the ESC and K key for a few seconds. It worked with the red LED on the keyboard turningsolid.
FAILED, TEARDOWN: COWIN E7 PRO ACTIVE NOISE CANCELLING Whatever the cause may be, unfortunately, this makes the E7 Pro unserviceable, as the ear-cup likes to plop out, hence the teardown which seems to have discovered a slight battery capacity discrepancy as well. Unfortunately, with the way that Cowin products have served me, I cannot really recommend them as much as before having bothfailed me
PROJECT: HIGH-CURRENT N-CH MOSFET TESTING STP16NF06L. This one is an older logic level MOSFET with a high level of resistance. The difference is clear – this one only made it to 6A ultimately, with 5A passing being possible with a Vgs of 5V. On the upside, 3.3V switching seems to be a possibility here too, although it is a bit close to the knee. SEAGATE ST320413A U SERIES 5 (3.5″ 20GB 2002) After the Medalist series of drives, the next types of Seagates I remember were the U-series. These were distinctive for wearing a “rubber bumper” which covered the top and bottom of the drive as protection against shocks in transit and damage to the PCB duringinstallation.
PROJECT: DIY MORE TUBE-BASED PRE-AMP KIT (6J1 “FEVER The unit was about AU$200 which was expensive in my eyes. But a few years later, I spotted the DIY More kit which seemed to do the same thing, sold on eBay as a 6J1 tube-based pre-amp kit, a clone of the “fever” design which is very popular. The whole kit cost just AU$8.87 including the tubes, which I thought was a bargain, so Ipromptly
TEARDOWN: GLADE SENSE & SPRAY AUTOMATIC AIR FRESHENER (SCJ Sometimes, it seems the posts around here have no rhyme or reason, and that’s exactly the way I like it. As a part of a sampling “club”, a while back, I received a Glade Sense and Spray Automatic Air Freshener.This rather interesting device claims to have “motion sensor technology”, featuring a small refill that lasts about a month.. Having tried mine, and emptied the refill, I REVIEW: GENERIC 4-PORT USB 3.0 TO PCI-E ADAPTER (STAR Specifically, I installed Version 3.0.23.0 driver first to gain access to the card, and then upgraded the firmware to Version 2.0.2.6. Originally, the card had firmware version 2.0.2.0 installed. Upgrading was successful. It was also determined that the card’s coexistence with an older NEC uPD720200 was not a problem, which was good. USER MANUAL FLOPPY TO USB EMULATOR SFR1M44 -U100K SFR1M44 -TU100K SFR1M44 -U100K -R GOTEK system Version 121006 User manual Floppy to USB emulator Model: SFR1M44 -U100K code*U00
REVIEW: GOTEK SYSTEM SFR1M44-U100K USB 1000 FLOPPY DISK Posted on May 19, 2013 by lui_gough. Following on my previous review of a 100-bank low-cost USB floppy emulator and testing of the emulator, I realized that the eBay market saw the introduction of another floppy emulator. This one is the GoTek System SFR1M44-U100K 1000-bank USB floppy emulator, also attractively priced around US$20. TEARDOWN: PHILIPS BDP2180/79 3D BLU-RAY PLAYER WITH STUCK At the time, there were a few units, but the Philips BDP2180/79 was the cheapest at AU$89, which was pretty much the same price as most regular Blu-ray players. Since the initial first few weeks, the unit’s not seen much action as watching things on a TV (centrally located) has fallen out of favour to watching video on a personaldevice (be
RTL-SDR: 433.92MHZ ASK/OOK DECODING OF VARIOUS DEVICES The model GE08-350 leads us to this datasheet from the company, G E-Chip Technology (HK). The datasheet tells us it’s an ASK 433.92Mhz TX module, thus giving us hope that it would be decodable by rtl_433. It turns out that it does work just fine, and its detected with the Prologue protocol decoder (indicating the sensor has the same type of 4TB HEAD-TO-HEAD: WESTERN DIGITAL GREEN WD40EZRX VS Western Digital Green WD40EZRX. The first contender is the Western Digital Green WD40EZRX. This is part of their “green” series drives, optimized for cool and quiet operation for desktop applications. It features a SATA III 6Gbit/s connection and a 64Mb buffer. The spindle speed is quoted as “IntelliPower”, but is most likely to be 5400rpm. TUTORIAL: INTRODUCTION TO SCPI AUTOMATION OF TEST When it comes to running scientific experiments, your test equipment are your “eyes and ears” measuring the quantities you are trying to observe. A lot of the time, purchasers tend to focus on specifications such as accuracy and resolution, while also keeping aneye on the price.
EXPERIMENT: MICROSD CARD POWER CONSUMPTION & SPISEE MORE ONGOUGHLUI.COM
REVIEW: ASTROLUX 3.7V LI-ION CELLS (18650/3000MAH, 21700SEE MORE ONGOUGHLUI.COM
PROJECT: PAEANSONIC CF210SP CD9088+CD7642 AM/FM RADIO KITSEE MORE ONGOUGHLUI.COM
PROJECT: “GENERIC” ZM-4 AT89C2051 4-DIGIT 7-SEGMENT LEDSEE MORE ONGOUGHLUI.COM
USER MANUAL FLOPPY TO USB EMULATOR SFR1M44 -U100K SFR1M44 -TU100K SFR1M44 -U100K -R GOTEK system Version 121006 User manual Floppy to USB emulator Model: SFR1M44 -U100K code*U00
SEAGATE ST320413A U SERIES 5 (3.5″ 20GB 2002) After the Medalist series of drives, the next types of Seagates I remember were the U-series. These were distinctive for wearing a “rubber bumper” which covered the top and bottom of the drive as protection against shocks in transit and damage to the PCB duringinstallation.
REVIEW: GENERIC 4-PORT USB 3.0 TO PCI-E ADAPTER (STARSEE MORE ONGOUGHLUI.COM
REVIEW: SANDISK ULTRA FLAIR 128GB USB 3.0 FLASH DRIVESEE MORE ONGOUGHLUI.COM
RADIOFAX: HSW64 (WEATHER FORECAST DIVISION, THAI Another one of our friendly “neighbour” radiofax stations is HSW64 from Thailand. This station is listed in the NWS/NOAA radiofax schedules as 7395kHz which is its SSB tuning frequency – the centre frequency is actually 1.9kHz above this. TUTORIAL: INTRODUCTION TO SCPI AUTOMATION OF TEST When it comes to running scientific experiments, your test equipment are your “eyes and ears” measuring the quantities you are trying to observe. A lot of the time, purchasers tend to focus on specifications such as accuracy and resolution, while also keeping aneye on the price.
EXPERIMENT: MICROSD CARD POWER CONSUMPTION & SPISEE MORE ONGOUGHLUI.COM
REVIEW: ASTROLUX 3.7V LI-ION CELLS (18650/3000MAH, 21700SEE MORE ONGOUGHLUI.COM
PROJECT: PAEANSONIC CF210SP CD9088+CD7642 AM/FM RADIO KITSEE MORE ONGOUGHLUI.COM
PROJECT: “GENERIC” ZM-4 AT89C2051 4-DIGIT 7-SEGMENT LEDSEE MORE ONGOUGHLUI.COM
USER MANUAL FLOPPY TO USB EMULATOR SFR1M44 -U100K SFR1M44 -TU100K SFR1M44 -U100K -R GOTEK system Version 121006 User manual Floppy to USB emulator Model: SFR1M44 -U100K code*U00
SEAGATE ST320413A U SERIES 5 (3.5″ 20GB 2002) After the Medalist series of drives, the next types of Seagates I remember were the U-series. These were distinctive for wearing a “rubber bumper” which covered the top and bottom of the drive as protection against shocks in transit and damage to the PCB duringinstallation.
REVIEW: GENERIC 4-PORT USB 3.0 TO PCI-E ADAPTER (STARSEE MORE ONGOUGHLUI.COM
REVIEW: SANDISK ULTRA FLAIR 128GB USB 3.0 FLASH DRIVESEE MORE ONGOUGHLUI.COM
RADIOFAX: HSW64 (WEATHER FORECAST DIVISION, THAI Another one of our friendly “neighbour” radiofax stations is HSW64 from Thailand. This station is listed in the NWS/NOAA radiofax schedules as 7395kHz which is its SSB tuning frequency – the centre frequency is actually 1.9kHz above this.MULTICID DECODER
MultiCID Decoder
FAIL, TEARDOWN: WD ELEMENTS SE 4TB 2.5″ USB 3.0 HARD DRIVE Just this week, my Dad came to me asking for help with an external bus-powered USB hard drive that just seemed to be stuck. It seemingly stopped working properly and he wanted me to just reformat it – to hell with the data that was on it as it wasn’t so important. RADIOFAX: XSQ GUANGZHOU, CHINA (SOUTH CHINA SEA MARINE Those who may have enjoyed my radiofax series may have noticed that there haven’t been any posts in a while. This is partly because I’ve just about covered all of the presently-operating services and haven’t had much time to revisit them. But sometimes I do get surprised – the discovery of XSG Shanghai was due to a helpful reader leaving a comment on my website. REVIEW, TEARDOWN: L336 LEARNING INFRARED REMOTE CONTROL One of the modern conveniences of audio-visual equipment is the ability to tele-command it with an infrared remote control, so you don’t have to get up out of your seat to push a few buttons. REVIEW: GENERIC 4-PORT USB 3.0 TO PCI-E ADAPTER (STAR If you’re still running an age-old dinosaur system like me (well, make that around six years old), then you’re probably feeling the pinch from not having quite enough USB 3.0 ports. Maybe you have none at all. I’m lucky that the motherboard I have has two first-generation NEC chipset based ports, but that’s slowly becoming a bottleneck now that I have more USB 3.0 devices than USB 2.0 PROJECT: DIY MORE TUBE-BASED PRE-AMP KIT (6J1 “FEVER Ever since the vinyl “revival”, I’ve been bitten by a vintage audio bug of sorts. Of course, the old formats always come with their headaches and frustrations, but they also have a character and charm associated with them. PHOTOSITE SIZES ON DSLR SENSORS So, as people who have been reading my Facebook posts would know – I recently became a Nikon convert – with a D3200 providing lots of megapixels for cheap. Of course, some of that is ma QUICK TEARDOWN, PAIRING: J.BURROWS WIRELESS 2.4GHZ USB Earlier today, my Dad requested some assistance with his J.Burrows Wireless Keyboard and Mouse Combo that was purchased from Officeworks. It was a rather low-cost set, not one I would have chosen myself, but after the batteries in the keyboard were replaced, it seems the keyboard stopped functioning and he was wondering whether it could befixed.
TEARDOWN: PHILIPS BDP2180/79 3D BLU-RAY PLAYER WITH STUCK Around three or four years ago, coincident with my purchase of a 3D TV, I decided to buy a Blu-ray player. I decided to opt for a 3Dcapable unit, so as
RADIOFAX: DDH3/DDK3/DDK6 (DEUTSCHER WETTERDIENST, GERMANY The triplet of stations from Germany (DDH3/DDK3/DDK6) are distinguished in the radiofax field. They operate on a +/-425Hz shift (whereas others operate on +/-400Hz), and they have the highest transmission powers – 10kW for DDH3 and 20kW for DDK3/DDK6. TUTORIAL: INTRODUCTION TO SCPI AUTOMATION OF TEST Tutorial: Introduction to SCPI Automation of Test Equipment with pyvisa. Posted on March 28, 2021 by lui_gough. When it comes to running scientific experiments, your test equipment are your “eyes and ears” measuring the quantities you are trying to observe. A lot of the time, purchasers tend to focus on specifications such asaccuracy and
EXPERIMENT: MICROSD CARD POWER CONSUMPTION & SPISEE MORE ONGOUGHLUI.COM
PROJECT: PAEANSONIC CF210SP CD9088+CD7642 AM/FM RADIO KITSEE MORE ONGOUGHLUI.COM
USER MANUAL FLOPPY TO USB EMULATOR SFR1M44 -U100K SFR1M44 -TU100K SFR1M44 -U100K -R GOTEK system Version 121006 User manual Floppy to USB emulator Model: SFR1M44 -U100K code*U00
PROJECT: SAINSMART FORTY-9ER “3W” 7.023MHZ QRP CWSEE MORE ONGOUGHLUI.COM
PROJECT: “GENERIC” ZM-4 AT89C2051 4-DIGIT 7-SEGMENT LEDSEE MORE ONGOUGHLUI.COM
REVIEW: GENERIC 4-PORT USB 3.0 TO PCI-E ADAPTER (STARSEE MORE ONGOUGHLUI.COM
SEAGATE ST320413A U SERIES 5 (3.5″ 20GB 2002) After the Medalist series of drives, the next types of Seagates I remember were the U-series. These were distinctive for wearing a “rubber bumper” which covered the top and bottom of the drive as protection against shocks in transit and damage to the PCB duringinstallation.
TEARDOWN: PHILIPS BDP2180/79 3D BLU-RAY PLAYER WITH STUCK At the time, there were a few units, but the Philips BDP2180/79 was the cheapest at AU$89, which was pretty much the same price as most regular Blu-ray players. Since the initial first few weeks, the unit’s not seen much action as watching things on a TV (centrally located) has fallen out of favour to watching video on a personaldevice (be
RADIOFAX: HSW64 (WEATHER FORECAST DIVISION, THAI Posted on January 27, 2019 by lui_gough. Another one of our friendly “neighbour” radiofax stations is HSW64 from Thailand. This station is listed in the NWS/NOAA radiofax schedules as 7395kHz which is its SSB tuning frequency – the centre frequency is actually 1.9kHz above this. This is common to SVJ4 from Greece which also has its SSB TUTORIAL: INTRODUCTION TO SCPI AUTOMATION OF TEST Tutorial: Introduction to SCPI Automation of Test Equipment with pyvisa. Posted on March 28, 2021 by lui_gough. When it comes to running scientific experiments, your test equipment are your “eyes and ears” measuring the quantities you are trying to observe. A lot of the time, purchasers tend to focus on specifications such asaccuracy and
EXPERIMENT: MICROSD CARD POWER CONSUMPTION & SPISEE MORE ONGOUGHLUI.COM
PROJECT: PAEANSONIC CF210SP CD9088+CD7642 AM/FM RADIO KITSEE MORE ONGOUGHLUI.COM
USER MANUAL FLOPPY TO USB EMULATOR SFR1M44 -U100K SFR1M44 -TU100K SFR1M44 -U100K -R GOTEK system Version 121006 User manual Floppy to USB emulator Model: SFR1M44 -U100K code*U00
PROJECT: SAINSMART FORTY-9ER “3W” 7.023MHZ QRP CWSEE MORE ONGOUGHLUI.COM
PROJECT: “GENERIC” ZM-4 AT89C2051 4-DIGIT 7-SEGMENT LEDSEE MORE ONGOUGHLUI.COM
REVIEW: GENERIC 4-PORT USB 3.0 TO PCI-E ADAPTER (STARSEE MORE ONGOUGHLUI.COM
SEAGATE ST320413A U SERIES 5 (3.5″ 20GB 2002) After the Medalist series of drives, the next types of Seagates I remember were the U-series. These were distinctive for wearing a “rubber bumper” which covered the top and bottom of the drive as protection against shocks in transit and damage to the PCB duringinstallation.
TEARDOWN: PHILIPS BDP2180/79 3D BLU-RAY PLAYER WITH STUCK At the time, there were a few units, but the Philips BDP2180/79 was the cheapest at AU$89, which was pretty much the same price as most regular Blu-ray players. Since the initial first few weeks, the unit’s not seen much action as watching things on a TV (centrally located) has fallen out of favour to watching video on a personaldevice (be
RADIOFAX: HSW64 (WEATHER FORECAST DIVISION, THAI Posted on January 27, 2019 by lui_gough. Another one of our friendly “neighbour” radiofax stations is HSW64 from Thailand. This station is listed in the NWS/NOAA radiofax schedules as 7395kHz which is its SSB tuning frequency – the centre frequency is actually 1.9kHz above this. This is common to SVJ4 from Greece which also has its SSBMULTICID DECODER
Manufacturer ID: Controlled and assigned by SD Card Association OEM/Application ID: Identifies OEM or card contents, set by Toshiba, SanDisk and MEI Product Name: 5 ASCII Characters Product Revision: 2 BCD Characters Product Serial Number: 32-bit unsigned integer Manufacturing Date: 3 BCD Characters YYM where actual year is is2000+YY (although
THE SOUNDS OF HF
High Frequency, otherwise known as HF, is a spectrum, that roughly is defined to be around 2Mhz to 30Mhz and is used for broadcast, military, amateur, aviation and marine purposes. REVIEW: TROUVER POWER 11 CORDLESS VACUUM CLEANER (VPL4 User Opinion. In my opinion, the relatively-unknown Trouver Tech POWER 11 is a very competent vacuum, especially when the price is considered. It is easy enough to use without the manual, almost plug-and-play, and the LED display is clear as to charging status, power remaining, power level FAIL, TEARDOWN: WD ELEMENTS SE 4TB 2.5″ USB 3.0 HARD DRIVE This drive was Made in Malaysia with a part number of WDBJRT0040BBK-0A and a capacity of 4TB. The interface to the drive is a microUSB-B port of the USB 3.0 variety with a hole for the drive activity indicator. Other than that, it feels quite similar to a Toshiba Canvio or countless other basic 2.5″-based “thick” external hard drives. RADIOFAX: XSQ GUANGZHOU, CHINA (SOUTH CHINA SEA MARINE Those who may have enjoyed my radiofax series may have noticed that there haven’t been any posts in a while. This is partly because I’ve just about covered all of the presently-operating services and haven’t had much time to revisit them. But sometimes I do get surprised – the discovery of XSG Shanghai was due to a helpful reader leaving a comment on my website. PROJECT: DIY MORE TUBE-BASED PRE-AMP KIT (6J1 “FEVER The unit was about AU$200 which was expensive in my eyes. But a few years later, I spotted the DIY More kit which seemed to do the same thing, sold on eBay as a 6J1 tube-based pre-amp kit, a clone of the “fever” design which is very popular. The whole kit cost just AU$8.87 including the tubes, which I thought was a bargain, so Ipromptly
TEARDOWN: PHILIPS BDP2180/79 3D BLU-RAY PLAYER WITH STUCK At the time, there were a few units, but the Philips BDP2180/79 was the cheapest at AU$89, which was pretty much the same price as most regular Blu-ray players. Since the initial first few weeks, the unit’s not seen much action as watching things on a TV (centrally located) has fallen out of favour to watching video on a personaldevice (be
TEARDOWN: RADIOSHACK AMPLIFIED TELEPHONE EARPIECE (43-229 Teardown: RadioShack Amplified Telephone Earpiece (43-229) Posted on January 5, 2017 by lui_gough. After my experimentation in building a T-coil receiver on my own, it seemed that the unit did have some issues which I eventually corrected. While it seems the schematic may have been a victim of a transcription error, I thought it would benice
REVIEW: SANDISK ULTRA FLAIR 128GB USB 3.0 FLASH DRIVE The drive itself occupies a small space on the card and is available in a number of colours. This particular unit advertises “up to 15X faster ” performance than USB 2.0 drives, but the fine print makes it clear that the assumption is that the USB 2.0 drive only writes at 4MB/s. In other words, they’re inferring that it writes at up to RADIOFAX: DDH3/DDK3/DDK6 (DEUTSCHER WETTERDIENST, GERMANY The triplet of stations from Germany (DDH3/DDK3/DDK6) are distinguished in the radiofax field. They operate on a +/-425Hz shift (whereas others operate on +/-400Hz), and they have the highest transmission powers – 10kW for DDH3 and 20kW for DDK3/DDK6. This makes the station relatively “loud” – for comparison, VMC/VMW operate at just 1kW.THE SOUNDS OF HF
High Frequency, otherwise known as HF, is a spectrum, that roughly is defined to be around 2Mhz to 30Mhz and is used for broadcast, military, amateur, aviation and marine purposes. TUTORIAL: INTRODUCTION TO SCPI AUTOMATION OF TEST Tutorial: Introduction to SCPI Automation of Test Equipment with pyvisa. Posted on March 28, 2021 by lui_gough. When it comes to running scientific experiments, your test equipment are your “eyes and ears” measuring the quantities you are trying to observe. A lot of the time, purchasers tend to focus on specifications such asaccuracy and
USER MANUAL FLOPPY TO USB EMULATOR SFR1M44 -U100K SFR1M44 -TU100K SFR1M44 -U100K -R GOTEK system Version 121006 User manual Floppy to USB emulator Model: SFR1M44 -U100K code*U00
PROJECT: SAINSMART FORTY-9ER “3W” 7.023MHZ QRP CWSEE MORE ON GOUGHLUI.COMFORTY 9ER QRPFORTY 9ER TRANSCEIVER REVIEW: GENERIC 4-PORT USB 3.0 TO PCI-E ADAPTER (STARSEE MORE ONGOUGHLUI.COM
PROJECT: “GENERIC” ZM-4 AT89C2051 4-DIGIT 7-SEGMENT LEDSEE MORE ONGOUGHLUI.COM
PROJECT: AT89S52+DS1302-BASED LED CLOCK KIT (EC1204BSEE MORE ONGOUGHLUI.COM
RADIOFAX: DDH3/DDK3/DDK6 (DEUTSCHER WETTERDIENST, GERMANY The triplet of stations from Germany (DDH3/DDK3/DDK6) are distinguished in the radiofax field. They operate on a +/-425Hz shift (whereas others operate on +/-400Hz), and they have the highest transmission powers – 10kW for DDH3 and 20kW for DDK3/DDK6. This makes the station relatively “loud” – for comparison, VMC/VMW operate at just 1kW. NOTE: BOSCH SENSORTEC BMP280 VS BME280 SENSOR CONFUSIONBME280 SENSOR DATASHEETBME280 DATASHEETBME280 ENVIRONMENTAL SENSORBME280 LIBRARY I2C While looking around for some cheap environmental sensors, I came across the seemingly ideal and relatively popular Bosch Sensortec BME280.This is a digital I2C sensor that can operate at 1.8 or 3.3V, providing temperature, humidity and barometric pressure measurements with high accuracy, low energy consumption and at low cost. FAILED, TEARDOWN: COWIN E7 PRO ACTIVE NOISE CANCELLING Whatever the cause may be, unfortunately, this makes the E7 Pro unserviceable, as the ear-cup likes to plop out, hence the teardown which seems to have discovered a slight battery capacity discrepancy as well. Unfortunately, with the way that Cowin products have served me, I cannot really recommend them as much as before having bothfailed me
THE SOUNDS OF HF
High Frequency, otherwise known as HF, is a spectrum, that roughly is defined to be around 2Mhz to 30Mhz and is used for broadcast, military, amateur, aviation and marine purposes. TUTORIAL: INTRODUCTION TO SCPI AUTOMATION OF TEST Tutorial: Introduction to SCPI Automation of Test Equipment with pyvisa. Posted on March 28, 2021 by lui_gough. When it comes to running scientific experiments, your test equipment are your “eyes and ears” measuring the quantities you are trying to observe. A lot of the time, purchasers tend to focus on specifications such asaccuracy and
USER MANUAL FLOPPY TO USB EMULATOR SFR1M44 -U100K SFR1M44 -TU100K SFR1M44 -U100K -R GOTEK system Version 121006 User manual Floppy to USB emulator Model: SFR1M44 -U100K code*U00
PROJECT: SAINSMART FORTY-9ER “3W” 7.023MHZ QRP CWSEE MORE ON GOUGHLUI.COMFORTY 9ER QRPFORTY 9ER TRANSCEIVER REVIEW: GENERIC 4-PORT USB 3.0 TO PCI-E ADAPTER (STARSEE MORE ONGOUGHLUI.COM
PROJECT: “GENERIC” ZM-4 AT89C2051 4-DIGIT 7-SEGMENT LEDSEE MORE ONGOUGHLUI.COM
PROJECT: AT89S52+DS1302-BASED LED CLOCK KIT (EC1204BSEE MORE ONGOUGHLUI.COM
RADIOFAX: DDH3/DDK3/DDK6 (DEUTSCHER WETTERDIENST, GERMANY The triplet of stations from Germany (DDH3/DDK3/DDK6) are distinguished in the radiofax field. They operate on a +/-425Hz shift (whereas others operate on +/-400Hz), and they have the highest transmission powers – 10kW for DDH3 and 20kW for DDK3/DDK6. This makes the station relatively “loud” – for comparison, VMC/VMW operate at just 1kW. NOTE: BOSCH SENSORTEC BMP280 VS BME280 SENSOR CONFUSIONBME280 SENSOR DATASHEETBME280 DATASHEETBME280 ENVIRONMENTAL SENSORBME280 LIBRARY I2C While looking around for some cheap environmental sensors, I came across the seemingly ideal and relatively popular Bosch Sensortec BME280.This is a digital I2C sensor that can operate at 1.8 or 3.3V, providing temperature, humidity and barometric pressure measurements with high accuracy, low energy consumption and at low cost. FAILED, TEARDOWN: COWIN E7 PRO ACTIVE NOISE CANCELLING Whatever the cause may be, unfortunately, this makes the E7 Pro unserviceable, as the ear-cup likes to plop out, hence the teardown which seems to have discovered a slight battery capacity discrepancy as well. Unfortunately, with the way that Cowin products have served me, I cannot really recommend them as much as before having bothfailed me
TECH FLASHBACK: PHILIPS PLC ELECTRONIC (9,11,15W/240V After showcasing the longevity of the old Philips SL “jar” lamp, one of the earlier designs of “compact” fluorescent lamp, I felt that it would be good to have another tech flashback looking at the lamps that came afterward, the Philips PLC Electronic.. These lamps were a lot lighter and smaller than the SLs that predated them, featuring an electronic ballast and a prismatic linear TUTORIAL: INTRODUCTION TO SCPI AUTOMATION OF TEST Tutorial: Introduction to SCPI Automation of Test Equipment with pyvisa. Posted on March 28, 2021 by lui_gough. When it comes to running scientific experiments, your test equipment are your “eyes and ears” measuring the quantities you are trying to observe. A lot of the time, purchasers tend to focus on specifications such asaccuracy and
GOUGH'S QSL CARD GALLERY Gough's QSL Card Gallery. This is my present collection of QSL cards. These cards represent an acknowledgement from international broadcasting stations that I have received their broadcasts and reported their signal characteristics adequately.TDK (DVD±R)
Because I have so many TDK discs, I’ve had to split it up. This post looks at the recordable discs of both plus and minus formats. TDK 2x DVD-R I only have the rear inlay for this particular SONY (DVD±R & DVD±RW) The second part of Sony posts deals with their DVD family of media, of which I have very few examples of. Sony 2x DVD-RW This appears to be relatively early in the DVD-era, with relatively old fash EXPERIMENT: MICROSD CARD POWER CONSUMPTION & SPI 64-byte write – 389.691kB/s, 64/158/74656us latency. 512-byte read – 671.439kB/s, 752/756/968us latency. 512-byte write – 689.212kB/s, 724/735.9/58188us latency. On the whole, the Delkin card is a hair faster on reads, with worst case write latency falling in-between the Sandisk and Verbatim on 64-byte accesses.VERBATIM (DVD±RW)
Verbatim is a highly respected brand of optical discs – they supply virtually every sort and were a subsidiary of Mitsubishi Chemical Corporation, thus their discs are almost all MCC products. REVIEW, TEARDOWN: L336 LEARNING INFRARED REMOTE CONTROL One of the modern conveniences of audio-visual equipment is the ability to tele-command it with an infrared remote control, so you don’t have to get up out of your seat to push a few buttons. PROJECT: PAEANSONIC CF210SP CD9088+CD7642 AM/FM RADIO KIT The only English you will find is in the listing description, which isn’t particularly easy to read nor informative: CF210SP is a new type of radio FM, AM two band radio, the FM band using the CD9088 chip, which uses patch element SMT package, the receive frequency range of 76-108HMZ, not only to accept the FM radio, can also receivecampus
REVIEW: GOTEK SYSTEM SFR1M44-U100K USB 1000 FLOPPY DISK Posted on May 19, 2013 by lui_gough. Following on my previous review of a 100-bank low-cost USB floppy emulator and testing of the emulator, I realized that the eBay market saw the introduction of another floppy emulator. This one is the GoTek System SFR1M44-U100K 1000-bank USB floppy emulator, also attractively priced around US$20. Reversing the mindless enslavement of humans by technology.Skip to content
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PROJECT: DC-TO-DC CONVERTER TRANSIENT/QUIESCENT ANALYSIS WITH R&SNGM202
Posted on March 1, 2020by lui_gough
I recently made a post about using a Rohde & Schwarz NGM202 Power Supply to perform automated efficiency testing of switching DC-to-DCconverters
.
It is rather convenient to be able to perform such testing with the one box, reducing cost, simplifying wiring and test set-up. I also made a passing mention that it might be possible to use the NGM202 to perform some other tests – perhaps some transient performance analysis and quiescent current analysis. This post documents my attempts at using the FastLog feature of the NGM202 to gain someinsight.
TEST SUBJECT
Testing was performed with the same MP1584-based module as in the previous posting, configured for a fixed 5V output. Looking at this particular module, it seems to be configured with a 100kohm frequency-setting resistor, suggesting a programmed frequency of 910kHz. As this is a modern switching controller chip, more likely than not, it is capable of cycle-by-cycle control. This is a lot faster than the maximum FastLog sample rate of 500kS/s which would only be able to digitise a bandwidth of 250kHz in the ideal case (Nyquist frequency). As a result, I’m not expecting this experiment to yield more than a more general overview of the converter’s load/line regulation behaviour and quiescent current consumptionpatterns.
It is also worth noting that the speed of the power supply can be quite important. The NGM202 claims a 30uS recovery time to within 20mV of the set-point. With switching converters, the change in current consumed can be quite sharp. With a power supply that does not have good transient response, interactions and oscillations can occur due to the regulation loop of the supply. Unfortunately, there are few easy wins in this regard – if you want to measure a wide bandwidth or make rapid cyclic changes in load, you can’t exactly parallel a bank of capacitors. However, given the speed of this supply compared to others I have used, I’m confident that we should be able to measure at least _something_. No harm in trying.LOAD REGULATION
Load regulation describes the ability of a power converter to hold a steady output voltage in the face of a changing load. The easiest way to test this is to watch the voltage at the output of the converter, as the load is stepped between two levels. To do this, I decided to write a Python program (see Appendix) which uses pyvisa to command the supply to generate load steps using the onboard QuickArb functionality, while logging the measurements at the power supply using the FastLog functionality. The program would step through various input voltages and test them with a 0.1A / 1A current step. The logged data would be analysed and plotted in MATLAB, with 50 transient events overlaid on the plot in rough alignment. Along the way, I learned a few interesting things. One is that you’re going to get a SCPI error if you try to set the voltage or current when QuickArb is running on the given channel. Thankfully, the NGM202’s _SYST:ERR?_ response is actually quite helpful in telling me which command caused an error, so I could debug it (unlike someother instruments).
I also learned that the latest manual now has an example of how to use FastLog over SCPI, which is a change that I had requested. As it turns out, the _proper_ way to do it is quite involved and I’m still yet to implement the whole logic. I’ve resorted to my own “lazy” implementation which basically just calls “_FLOG:DATA?_” over and over which works on NI-VISA (but not pyvisapy). I also discovered that my expectation that generating a periodic 0.2s waveform with a capture rate of 500kS/s would yield a 100,000 sample period was not quite 100% accurate, as it seems that the actual period is closer to 100,018 samples. I didn’t implement any “trigger” style threshold/alignment logic, instead opting to stick with integer sample lengths for the plotting. LOAD REGULATION AT 9V At 9V input, when the load steps up, the output voltage collapses for a short time before recovering. The excursion seems to dip the voltage by almost 70mV (1.4%) for about 40uS before recovering. It’s interesting to see that the ripple noise of the converter is visibleat the higher load.
When the converter is unloaded, an upward transient is experienced, moving up by about 60mV for about 46uS and then decaying back to the expected voltage with some visible oscillation. LOAD REGULATION AT 12V For an input of 12V, a very similar trend is observed, but it seems the overshoots are only occasionally as bad as at 9V input, with the majority being about 10-20mV less. LOAD REGULATION AT 15V Further minor improvements are seen as the input is raised to 15V. LOAD REGULATION AT 20V But when raised to 20V, the unloading of the converter results in some overshoots twice as high as before. Converter noise also seems toincrease.
It’s not going to be as accurate with regards to peaks and being able to capture high-bandwidth behaviour as using an oscilloscope with a proper power rail probe. But it is fascinating that all of this could be measured, just with a power supply and no other equipment. It doesn’t give you cycle-by-cycle analysis – that’s not within the realm of its capabilities, but it’s still able to give some indication of ripple and noise and oscillatory behaviour at converter loading or unloading.LINE REGULATION
Line regulation describes the converter’s ability to hold its output stable in the face of a changing input voltage. To test this, I used a similar set-up to the one before, but instead of varying output load, I was varying the input voltage from 20V to 9V and back again, with various fixed loads on the output. To avoid an overload of graphs, I will only illustrate the results from a few of the tested currentlevels.
AT 100MA LOAD
With a light load on the output, it takes a while for the converter to settle after the input voltage changes. This is probably due to the converter’s control loop and capacitance on the output, but we can see the voltage continues to drift even after the initial correctionis made.
Moving closer, when the input voltage is stepped up from 9V to 20V, the output voltage peaks about 8mV higher, before settling about 6mV above the original voltage. This happens in about 40uS, but there are some instances where it seems the transition happened a little earlyor late.
The downward voltage transition sees the reverse occur – an undershoot that reaches about 9mV down and then recovers to about 5mV down on a similar timescale.AT 500MA LOAD
PLEASE IGNORE THE LABELLING – I have mislabelled the graphs with the top graph as the 20V -> 9V transition and the bottom as the 9V -> 20V transition. Again, some early and late transients can be seen on the upward transition, but the magnitude of the disturbance is now 17mV (0.34%). On the downward transition, the magnitude is now closer to 12mV but there is a presence of a double-peak indicating some oscillatory behaviour.AT 1A LOAD
Pushing the load up to 1A masks the overshoots and undershoots entirely, instead, the change in voltage manifests in additional noise in the output. It seems that perhaps this is closer to the “sweet spot” for this converter.AT 1.5A LOAD
Pushing further up to 1.5A results in more noise but the presence of oscillations on the upward transition that has a magnitude about 180mV (3.6%). The downward transition also shows a big change in outputvoltage.
QUIESCENT CURRENT/POWER Finally, quiescent current and power represents the converter’s power consumption when completely unloaded. To test this, I used the NGM202’s onboard statistics capability, setting an input voltage, resetting the statistics, waiting a fixed dwell time (5-minutes) and then reading the average voltage, current and power. To test the quiescent current profile, I used the FastLog functionality to record the current profile. QUIESCENT CURRENT AND POWER VS VOLTAGE The quiescent current of the converter seems to hover around 0.3mA with a slight dependence on voltage. It seems to bottom out around 15V, but this is the _current_ and not the power. Quiescent power seems to increase with voltage on a nearly-linear basis, from 3mW at 9V to 6.5mW at 20V. This is not entirelyunexpected.
QUIESCENT CURRENT PROFILE AT 9V Using FastLog to record the quiescent current profiles shows that at 9V, the switching seems to be rather erratic, with irregular peaks in current, but also the occasional excursion below 0V which suggests _perhaps_ interaction with the switching of the module and the recovery/response of the power supply (so in essence, power from the converter’s capacitors may have been flowing back briefly to the power supply as its output voltage was below the converter’s input terminals). I’m not entirely sure, but that would be my best guess. QUIESCENT CURRENT PROFILE AT 12V At 12V, the switching is more regular, but with occasionally largepulses.
QUIESCENT CURRENT PROFILE AT 20V By 20V, the switching has a more regular cyclic pattern. The strange shapes suggest something strange may be happening with the duty cycle or potentially pulse-skipping for energy efficiency. However, the high peak-to-average ratio reminds us that while switching converters may have a low average quiescent current, they might not be happy running off something with a high internal resistance (e.g. a CR2032 coin-cell battery). This is where having a larger input capacitance with low ESRmay help.
CONCLUSION
In this post, I explored the measurement of load regulation, line regulation and quiescent current using the NGM202 power supply alone and its onboard QuickArb, FastLog and statistics capabilities. As it doesn’t have a bandwidth/sample rate high enough to match that of the converter’s cycle-by-cycle regulation, we are not expecting miracles in terms of being able to see fine detail, but it was still possible to clearly show the overshoot and undershoot on transitions and some oscillatory behaviour. Quiescent current measurement is especially easy given the onboard statistics features, while FastLog serves to illustrate the peakiness of switching converter waveforms. As an aside – in the last posting, I mentioned Rohde & Schwarz had a new power supply on the way. Well, it’s now been unveiled as theNGP800 series
– two or four channels, 200W per channel, with each channel either 0-32V/0-20A or 0-64V/0-10A. It seems to be the latest of their performance line, with a form factor wider than the NGM202 but with the same touch-screen interface. Definitely a more modern addition to the performance line. Continue reading →LIKE IT? SHARE IT!
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SGJPHK2017: TRAVELLING AROUND SINGAPORE (MRT, LRT, BUS, ETC.) Posted on February 29, 2020by lui_gough
Whenever I get a bit of a break, I like to look through my stash of holiday photos I’ve not yet posted and reflect a little bit about the experiences I had while I’m overseas. After all, I’m due for another holiday soon … so I guess I must put in a little more effort in getting these posts out in a timely manner. In this post, I’ll be talking about transport in Singapore. I visited Singapore in July to August of 2017 for about a week, just wandering around and absorbing the sights. In the past, I made a concerted effort to document the public transport systems, but in Singapore, I felt a little less inclined. Part of the reason is the rather clean and sterile culture, which at the time, seemed to focus on being a good citizen which included not taking random photos especially including strangers. At the time, there were campaigns about not filming fights and spreading videos over social media amongst other things. As a result, I took a more reserved approach, so this posting will have a mix of transport content instead. Looking back at my GPS track logs (which can’t track underground), I can tell that I definitely covered a good amount of area by travelling on public transport and on foot. It’s clear that Singapore is a very well _connected _country, but it seems they’ve got plans for even more infrastructure.BY AIR
Regarding transport, Singapore is perhaps most important in the Asian region for its massive Changi Airport. It’s a great place to make interconnections and is a gigantic hub. It consistently wins awards, although I probably spent a lot less time in there than I should have – since I was so eager to get outside. I did catch some PA announcements when flying out – Lost Passport and Paging Passenger in Korean.
Unlike some other airports I’ve been to, their PA system is prettydecent.
That’s not to say that Changi wouldn’t make an appearance in my journey. Normally, cameras and airports don’t really mix well. But bring your camera to Changi Beach Park and things don’t seem to be so bad, except for the possibility of sand getting into places where it shouldn’t … best be careful. As a result, I plonked myself onto the sandy beach, watching as others went about their own business. I got out the telephoto lens, watching for inbound aircraft on Flightradar24 as I snapped some photos. But not before grabbing a few more pictures of interesting signs. Looks like the beach is home to a number of _suspicious _activities … lets hope nobody calls the cops on me! That was an enjoyable morning of plane-spotting – quite a few carriers I’ve not seen elsewhere, but also a few familiar ones from home – like Jetstar. I’m no real plane-spotter, but I suppose when you’re on a beach next to one of the busiest airports, this comesnaturally.
It was catching the bus to and from this venue that I discovered what Checkpoint Mode means for buses – the driver switches Checkpoint Mode on so that you can tap off as you are “forced off” the bus. This suspends your ride and you are left in a shelter on the side of the road as the bus enters a secure area to pick up passengers from this area (airport staff, mainly). Then, when your bus comes back after doing the loop, the readers are set into Checkpoint Mode again to resume your ride. This was a very perplexing thing to me when I read about it on the LTA’s website, but after experiencing it in person, it all makes sense.BY BUS
I’ve not got much to say about buses in Singapore, except that they pretty much just work. I had one of the apps installed from one of the four bus operators, and it was a simple task of looking up the appropriate route, stop list and departure times with real-time information. Some of the more popular routes seem to operate on a frequency basis, with the drivers having a headway regulation display which shows the time difference between the bus ahead and behind so that they can prevent buses from bunching up. Pretty neat. I liked that some of the buses were double-deck to cope with demands and alleviate traffic jams to some degree, meaning that there was a good chance to do some filming – like my ride on Route 80 to Harbourfront Interchange (which was quite massive):
There are multiple operators, but as long as you have an appropriate contactless card (i.e. EZ-Link or NETS FlashPay), it’s a simple matter of tapping on and off as necessary. One
does have to be careful to make sure they tap on the appropriatereader , as
some are configured entry/exit, while others are exit-only. As above, if you’re near the airport, there’s also potentially checkpoint mode to worry about as well. It’s also interesting to look at the advertising plastered on the buses – there are many instances of various public-service style announcements trying to inspire positive social change. While on the one hand, it’s a bit of a chuckle to think about how cruel some people might be, on the other to see it so explicitly called out suggests it might be an actual problem (and not a small one at that). It seems that there’s a lot of aspiration for Singapore to “be better”, which often means investment in what seems to be excellent public infrastructure (at least, to a tourist) but perhaps people are still lagging behind somewhat.BY MRT
The MRT is probably the main public transport system in use which is a mixture of above and below-ground lines and segments. When I visited in 2017, the map (adapted from the Land Transport Authority ofSingapore
)
looked like this and I was able to travel across all the highlightedareas:
At the time of my visit, the East-West line extension to Tuas Link had completed and opened, although sometimes operating slowly because of a transition between signalling systems. Aside from that, the Downtown line extension was under construction. The Thomson East Coast line had already been planned with construction also underway. This results in a rather interesting-looking map where the Circle line isn’t exactlya circle …
… but their new map definitely has a circular Circle line and a few more curves. Part of the Thomson East Coast line has also opened to the north. I found the MRT system easy to use, convenient, and relatively fast although with subtle differences between lines and teething issues with a driverless conversion of the East-West lineat the time.
TRAVELLING AROUND
MRT stations are fairly well spaced about Singapore – you’re bound to run into signs like these which point you to the nearest station. These can be above ground or underground depending on the line. The MRT lines are operated by either SMRT or SBS Transit, but commuters don’t need to worry about that too much. The nearest station to where I stayed was Kallang, on the East West line. The above ground station looked fairly plain with an arched roof. At the time of my visit, the East West line was still undergoing conversion to driverless operation. On my first ride on the line, I experienced some anomalies, such as the doors opening and then rapidly shutting at stations, not observing the dwell time. Other times they would re-open while the internal announcements would be out of sync. Problems with overshooting were also experienced on occasion, but this seems to be a problem due to the number of different rolling stock in use on the line and their differing characteristics. On the whole, it still worked well enough with only very rare delays. The stations themselves had half-height passenger screen doors and massive fans – unfortunately, being exposed to outdoor temperatures in Singapore means that it’s normally quite hot, but the trains are ice cold, which is a plus. Air conditioning to the rescue! Some stations have rather interesting architectural features, such as this “space-ship”-looking saucer at Expo. While the East-West line was still undergoing conversion at the time of my visit, the North-South line was still driven manually as far as I know. The newer lines (e.g. North-East ), however, were already driverless with this notice at Dhoby Gaut warning passengers about doors which close automatically. It seems driverless technology is well proven in these lines which operate mainly underground – a smooth ride for the most part. There are some places where the age of the East-West line shows, for example, an underground station where a full-height passenger screen door from Westinghouse Brake and Signal Co. Ltd. can be seen. That’s a beautiful relic right there! It seems that they had some incentive program based on QR codes at stations which would enable people to earn points and redeem rewards. I didn’t investigate this further, but I did hear that some people had (cleverly) taken down the QR codes at different locations and would scan photos of these codes to collect points even though they were not travelling on the MRT … so the program was somewhat curtailed. The above codes a text block with “KAL_PSD_PS36_9332”as the payload.
Inside the train is frosty air-conditioning that can result in some condensation forming. The route map is plastered above doors with a yellow multi-lingual sign that says to keep clear of doors. The newer trains have some LCD passenger information displays, but the older ones had a nice blue VFD display. Not a common choice of display, nor a common colour, but they were beautiful. Unlike some other operators around the world, it seems that they want to know about problems from commuters – so there’s their Snap-Rep contact to which you can report faults using WhatsApp. In every station, there are maps for the locality and interchanges – but this one never seemed to be fitted with its transfer service list, instead showing a mock-up/sample. Not a mistake I expected to see. There are also rules about transfers (45-minutes, not onto the same service) and total journey time (2-hours maximum). That being said, if you’re a real early-bird, apparently travelling to downtown stations before 7:45am means a freeride
with a discount of 50c up to 8:00am. I never could get myself up that early though – I’m on holiday!UNDER CONSTRUCTION
I was caught-out at one point – walking around, I saw a sign towards an MRT station that wasn’t even open. That’s not a major issue though – I just walked to another one. At the time, they had signage regarding later opening of the Downtown Line on Sundays to prepare for full opening by the end of 2017. Travel alternatives include regular route bus services and a shuttle busservice.
I did manage to snap a random image of a station still under construction. This would be part of the Downtown Line. I also managed to snap an image of the hoardings around the future Napier station on the Thomson East Coast Line, due for opening around2021.
Topping Up and Tapping On I travelled with a NETS FlashPay card which can be topped up at any ticket machine. The left shows a cash top-up from a newer machine at Downtown, which has a wider receipt paper while the right shows a top-up from an overseas Visa Debit card (as credit) – it worked justfine.
The
NETS FlashPay card can be used to purchase small items at certain retail outlets, similar to the Octopus card in Hong Kong. I like how the top-up receipts show the values and the station. I only ever had one issue with the GTM top-ups at Aljunied. The machine couldn’t verify the top-up on the card (even though I didn’t remove or disturb it in the process). It results in this print-out which says “value may not be added” with a message to “please approach station staff for verification.” As it turns out, there were no issues and the top-up completed justfine.
Instead of the GTMs, at some stations, there are more advanced ticket machines. I played with the TransitLink AVM+ which has the ability to e-mail you a .csv file of transaction history. Unfortunately, these machines weren’t that widespread. The .csv shows the fine details of how the system works, down to 30-transactions depth. It seems that similar to the Opal card, a maximum charge is deducted on tapping on, with a refund processed on tapping off on a bus. Train travel is not processed the same way, with the payment deducted in a single line. Purchases at McDonalds and KFC can be seen – the service descriptor is very limited in lengththough.
Many people have their transport card in their wallets and tap their whole wallet on the readers. Unfortunately, similarly to the Opal system, the readers don’t always select the correct card or can suffer issues with card collisions. There was a cute cartoon-style poster which mentioned this – but people still don’t seem to do it. Perhaps taking out a card is just too inconvenient for some … so they try, try and try again.Sounds of the MRT
I spent a lot of time riding around the MRT, hence I have a lot of recordings (some noisier than others) to share. The system sounds quite homogeneous at first, but there are some subtle differences in some sounds which give certain lines/systems away. * NEXT STATION INTERCHANGE ANNOUNCEMENT * 20170727-MRT-NS-IC-OutramPark – “ Next station Outram Park Interchange. Passengers may alight and change to the East-West Line. ” * 20170728-MRT-NS-IC-PayaLebar-hq – “ Next station Paya Lebar. Change at the next station for the Circle Line.” * 20170731-MRT-NS-IC-Bugis-DTL-hq – “Next station Bugis. Change at the next station for the DowntownLine.”
* 20170731-MRT-NS-IC-BuonaVista-CCL-hq – “ Next station Buona Vista. Change at the next station for the Circle Line.” * 20170731-MRT-NS-IC-OutramPk-NEL-hq – “ Next station Outram Park. Change at the next station for the North-East Line.” * 20170727-MRT-NSIC-Sengkang – “ Next station Sengkang Interchange. Passengers may alight and change to Sengkang LRT Line. ” * 20170802-MRT-NSIC-Newton – “ Next station Newton Interchange. Passengers may alight and change to the North-South Line.” * INTERCHANGE STATION ANNOUNCEMENT * 20170727-MRT-SA-IC-RafflesPlace+PMTG–
“For train service towards Orchard, Yishun and Woodlands. Raffles Place. Please mind the platform gap.” * 20170727-MRT-SA-IC-Serangoon – “ Serangoon. Change at this station for theNorth-East Line.”
* 20170728-MRT-SA-IC-BishanPMTG – “ Bishan. Change at this station for the North-South Line. Bishan. Please mind the platform gap.” * 20170728-MRT-SA-IC-BotanicGdns+PMTG – “ Botanic Gardens. Change at this station for the Downtown Line. Botanic Gardens. Please mind the platform gap.” * 20170728-MRT-SA-IC-BuonaVista+EWL–
“ Buona Vista. Change at this station for the East-West Line. Buona Vista. Please mind the platform gap.” * 20170728-MRT-SA-IC-PayaLebar-hq – “ Paya Lebar. Change at this station for the CircleLine.”
* 20170731-MRT-SA-IC-CityHall-hq – “ City Hall. Cross over to Platform A for train service towards Orchard, Yishun and Woodlands. City Hall” * 20170731-MRT-SA-IC-JurongEast – “ Jurong East. Cross over to Platform E for train service towards Woodlands and Ang Mo Kio. Jurong East.” * 20170731-MRT-SA-IC-RafflesPlace-hq – “ Raffles Place. Cross over to Platform D for train service to Marina Bay and Marina South Pier. Raffles Place.” * 20170801-MRT-SA-IC-Newton-DTL – “ Newton. Change at this station for the Downtown Line. Newton. Please mind the platform gap.” * 20170801-MRT-IC-Bishan – “Change at this station for the Circle Line. Change at this station for the Circle Line. Bishan.” * 20170801-MRT-IC-DhobyGhaut – “Change at this station for the Circle Line or the North-East Line. Change at this station for the Circle Line or the North-East Line. Dhoby Ghaut. Please mind the platform gap.” Sometimes it seems the systems like repeating themselves just to be extra clear. * STATION APPROACH ANNOUNCEMENT * 20170728-MRT-SA-IC-MacPherson+PMTG – “ MacPherson. MacPherson. Please mind the platformgap.”
* 20170728-MRT-SA-Aljunied-hq – “ Aljunied. Aljunied.” * STATION APPROACH TERMINATING ANNOUNCEMENT * 20170727-MRT-SAT-Punggol – “ Punggol Terminal. Please mind thegap. ”
* 20170731-MRT-SAT-TuasLink – “ Tuas Link. This train service ends here. Thank you for travelling with SMRT. Tuas Link.” * 20170801-MRT-SAT-IC-JurongEast-EWL – “ Jurong East. This train service ends here. Cross over to Platform C on the left for train service towards the City, Pasir Ris and Changi Airport. Cross over to Platform F on the right for train service towards Tuas Link. Jurong East.” * 20170802-MRT-SAT-BukitPanjangIC-partial – “ Bukit Panjang Terminal. This train terminates at this station. Thank you for travelling with SBS transit. Please mindthe gap. ”
* 20170806-MRT-SAT-ChangiAirpt – “ Changi Airport. This train service ends here. Thank you for travelling with SMRT. Changi Airport. Please mind the platformgap.”
* 20170805-MRT-SAIC-Promenade – “ Promenade. This train service will end at Stadium. Change at this station for the Downtown Line. If you are travelling towards Dhoby Ghaut, please proceed to Platform B.” * 20170728-MRT-TS-IC-Harbourfront+PMTG – “ Harbourfront. This train service ends here. Change at this station for the North-East Line. Harbourfront. Please mind theplatform gap.”
* NEXT STATION ANNOUNCEMENT * 20170731-MRT-SA-IC-GulCircle-hq – “ Next station, Gul Circle.” * 20170728-MRT-AA-NS-Lean+MacPherson – “ Please do not lean against the train doors. Next station, MacPherson.” * 20170727-MRT-NS-Lavender – “ Next Station, Lavender.” * 20170731-MRT-NS-JurongEast-hq – “ Next Station, Jurong East.” * 20170802-MRT-SA-JurongEastIC – “ Next Station, Jurong East. This train service will end at Jurong East Platform D. Train doors will open on both sides. Proceed to platform F for train service towards Joo Koon.” I really like Jurong East as they like to do fast-interchanging by opening doors on both sides. * NEXT STATION TERMINATING ANNOUNCEMENT * 20170727-MRT-NST-Punggol – “ Next station, Punggol Terminal. Passengers change to the Punggol LRT Line. Thank you for travelling with SBSTransit. ”
* 20170730-MRT-NST-IC-DhobyGhaut – “ Please do not lean against the train doors. Next station, Dhoby Ghaut. This train service will end at Dhoby Ghaut. Change at the next station for the North-South line or the North-Eastline.”
* 20170731-MRT-NST-TuasLink – “ Next station Tuas Link. This train service will endat Tuas Link.”
* 20170802-MRT-NST-BukitPanjangIC – “ Next station, Bukit Panjang Terminal. This train service terminates at the next station. Passengers may alight and change for the Bukit Panjang LRT.” * 20170728-MRT-NS-IC-Harbourfront – “ Please do not lean against the train doors. Next station Harbourfront. This train service will end at Harbourfront. Change at the next station for the North-East Line.” * 20170806-MRT-TS-ChangiAirpt – “This train service will end at Changi Airport.” * GENERAL/PLATFORM ANNOUNCEMENTS * 20170727-MRT-AA-SuspiciousPerson – “ If you see any suspicious looking person or article, please inform our staff. Press the emergency communication button on the side of the train doors. …etc” * 20170731-MRT-AA-Mand-Suspicious – Suspicious persons announcement in Mandarin. * 20170731-MRT-AA-PMTPG – “Please mind the platform gap.” * 20170731-MRT-AA-Ukn2-Suspicious – Suspicious persons announcement in another language? Hindi? * 20170731-MRT-AA-Ukn-Suspicious – Suspicious persons announcement in another language? Tamil? * 20170731-MRT-PA-GivewaytoAlighting – “ Attention Please. Please give way to alighting passengers before boarding. Thank you.” * 20170731-MRT-PA-NotForBoarding – “Train at Platform A is not for boarding. Attention Please. The train at Platform A is not for boarding. The train at Platform A is not for boarding.” * 20170802-MRT-PA-BatchAnn – Many mixed announcements in different languages. “Please allow passengers to alight before boarding. Thank You.” “Passengers transferring to East-West line, please use the linkway at the Mezzanine Level.” Note the word “mezzanine” is not synthesizedcorrectly.
* 20170804-MRT-PA-AlightPax – “Please allow passengers to alight before boarding. Thank You.”
* 20170802-MRT-SA-DTLTest – “The Downtown Line will operate from 7:30am on Sundays to facilitate testing works. If you need to travel before 7:30am, you can take existing bus services or the shuttle bus service which will travel along the Downtown Line stations. Visit www.lta.gov.sg for moredetails. ”
* MANUAL ANNOUNCEMENTS * 20170731-MRT-MA-Delay – “Train passengers. This train will be delayed departing from the station. Thanks for your understanding. ” * 20170731-MRT-MA-TuasLinkTerm – “This train will be removed from service. All passengers please alight at Tuas Link station.” * 20170731-MRT-NSR-JurongEast – “Next station, Jurong East. Cross over to Platform A for train service towards Woodlands and Ang Mo Kio.” – Note that this announcement is coming over the trunking radio, hence lower quality. The latter announcement is made by the onboard announcement system. Unkeying beep can be heard towards the end. * 20170802-MRT-SA-BukitPanjang+DTLTest – “ Attention passengers. Passengers going towards Bukit Panjang may board the train at Platform C or Platform D. Thank You.” “Travelling on the Downtown Line on Sundays? From 14th May to 27th August, the Downtown Line will operate from 7:30am on Sundays to facilitate testing works. If you need to travel before 7:30am, you can take existing bus services or the shuttle bus service which will travel along the Downtown Line stations. Visit www.lta.gov.sg for more details.” + other languages. Note how “August” is synthesized similar to the word“octopus”.
* DOOR OPENING AND CLOSING * 20170727-MRT-DC-Message – “Doors are closing. ” * 20170727-MRT-DC-Message-CE-hq – “ Doors are closing. ” Note that the rapid pips sound less sharp here. * 20170727-MRT-DO-DC-Prot-EW – “ … Doors are closing.”
* 20170727-MRT-DO-DC-Prot-NE – “ … Doors closing. ” Note this sounds like it’s replaying a recording of the rapid pips – they sound very muffled. * 20170731-MRT-DC-Message-xhq – “ Doors are closing. ” – this is a very clear recording. * 20170802-MRT-DC-DTLDual – “ Doors closing. ”. I particularly like this sound – the rapidity of the pipping is rather comforting. Having advance notice of door closure is a good feature – more systems should probably adopt this. I believe this is from theDowntown Line.
BY LRT
Singapore also has three light rail transitsystems
(LRT) which interconnect with the MRT. These are the Bukit Panjang, Sengkang and Punggol LRT systems, denoted in grey on the route map. The systems are built with predominantly loop sections to service the areas around MRT stations. The Bukit Pangjang system is the oldest of the three, using BombardierInnovia APM 100
people
movers. These remind me a bit of guided busways, as the carriages run on rubber tyres. The services run coupled pairs of carriages and has had some history of accidents and incidents. It feels a bit
dated and is reaching its end of life. The stations themselves are interesting – involving sets of stairs which wind upwards to the elevated platform which is only protected by barriers outside of door sections – no platform screen doors here. The system operates automatically – so the lack of screen doors seems to be at odds with most automated systems I’ve seen. Riding the system, it seemed rather unusual. More used to the elevated sky rails which have barriers on the sides of the elevated running rails, the lack of barriers gave me a slight sense of vertigo and a fear that a stiff wind could blow the units off the tracks, especially when cornering some of the narrow curves. It was a bit of an experience, but the nerves quickly faded and I learned to enjoy the ride through town on elevated tracks. It’s a good view. One of the stations on the Bukit Panjang LRT that I felt I had to visit was Ten Mile Junction (BP14). This was an odd station on a “spur”, served by an infrequent single-carriage service C. This was THE LRT station famous for being integrated into a shopping mall building. Here we see the old turnstile ticket validators on the wayto the platform.
As a result of this integration and the air conditioning, the station has full platform screen doors. I wasn’t aware that the depot for the system is actually along this branch, as this station closed 13thJanuary 2019
, having
the distinction of being the only station to have closed on the LRT network. The station has just one platform. The timetable at the time of my visit shows 20 minute service intervals for the most part, but with gaps in services on weekdays. There was a door fault – either with the train or platform screen doors, resulting in this half-opening mess. Within the train, on the front window, was a route map. I suspect this particular unit was dedicated to running the Service C. I also visited the Punggol and Sengkang LRT systems, both of which use Mitsubishi Crystal Mover C810/C810A
automated people movers in a two-car configuration. These systems felt a bit newer and more modern by comparison and are the same as used in the Changi Airport Skytrain, which I
didn’t have a chance to ride unfortunately. The stations are built some way above the ground, but unlike the other system, there are barriers on the sides … … this is because the third rail runs along the side of the train. This makes the system feel less vertigo inducing. The ride is relatively smooth, as this system also appears to be rubber-tyred. The platforms (at the time) were unprotected which is again unusual for an automated system. This leads to the placing of signs saying “Value Life. Act Responsibly.” I’m not sure that works … As with any system, there are periods of track-work. As the system’s loops run in both directions, a closure normally only affects one direction meaning that it takes a little longer to catch the service the long way round. This is hardly a big inconvenience when the line lengths are only about 10km. The system seems to be built with expansion in mind, especially if welook at Teck Lee
(PW2) station which was built in advance for future development but not opened. I believe the train made a stop at the station, did not open its doors and continued onwards.SOUNDS OF THE LRT
The LRT sounds part of the family, in part due to the use of a similar voice and rapid pips, but the two systems do sound different especially with the use of “dings” and “ding-dong”. * 20170802-LRT-DCNS-BukitPanjang – “Doors closing. Next Station Bukit Panjang.” * 20170802-LRT-DCNS-Senja – “Doors closing. Next Station Senja.” * 20170802-LRT-DCNS-TeckWhye – “Doors closing. Next Station Teck Whye.” * 20170802-LRT-DODCNS-Jelapang–
“Senja. … Doors Closing, Next Station Jelapang.__“
* 20170806-LRT-AANS-Kangkar – “ Please do not lean against the doors. Next StationKangkar.”
* 20170806-LRT-AANS-Rangung – “ Please do not lean against the doors. Next StationRangung.”
* 20170806-LRT-DC-HoldHandrail – “ Doors Closing. Please stand clear of doors. Please hold onto the handrail. Thank you.” * 20170806-LRT-NS-BukitPanjang – “ Doors Closing. Next Station Bukit Panjang.” * 20170806-LRT-SA-BukitPanjang-IC – “ Bukit Panjang. Passengers going to Choa Chu Kang please proceed to Platform 1.” * 20170806-LRT-SA-DO_DC-Kangkar – “ Kangkar. … Doors Closing. Please stand clear of doors. Please hold onto the handrail.Thank you.”
AROUND SENTOSA
Every tourist to Singapore has probably heard about Sentosa Island. After all, it’s practically a tourist resort island (also known as a _tourist trap_). There wasn’t too much in for me to do at Sentosa, not being a theme-park kind of person, but I did at least get to visit Fort Siloso and take a walk through the natural areas. But getting to/from/around Sentosa is an interesting topic in itself. One way to get to Sentosa is just to catch the Sentosa Express monorail from Harbourfront. This service runs smaller versions of the Hitachi straddle-beam monorail that was seen in South Korea. They seem to love colouring the train sets, with the system having four stations in total, spanning a distance of 2.1km. YES, JUST 2.1KM. The line charges fares for travelling from the mainland to the island (~SG$4), and is otherwise free of charge. Of course, with such a short distance, one is probably inclined to walk to the island. In fact, just underneath the beam is a covered walkway which leads you to the island, with moving walkways to speed up the process. Unfortunately, walking isn’t _free_ as an entrance fee is technically SG$1 charged at the island … but when I was there, somehow they chose not to charge the fee for whatever reason. It seems this may still be the case … If you can walk there, you can also cycle there (SG$2). Apparently cycling to Sentosa island is still free for now as the entrance is waived … Otherwise, you can also take public buses, arrive by taxi (with surcharges of course) or … if you really have an excess ofmoney …
… you could opt to ride the cable car from Mount Faber or Harbourfront. That’s a luxury that could cost you SG$30+. Cool to see in action, but I don’t think that’s really my thing. I’m not exactly fond of heights. One of the more interesting things from my time at Sentosa (aside from visiting Fort Siloso) was seeing this in the forested area. This green piece of metal, winding about, is the remnants of the original SentosaMonorail –
operating all the way back from 1982 to 2005 when it finally ended operation owing to declining popularity as it was slow anduncomfortable.
The other thing I visited was the Sentosa Beach Tram, except, it probably should have been called the Sentosa Beach _Scam_. It’s not a tram at all – it’s basically electric buggy vehicles running between stations, free of charge. I was expecting … I dunno … something with _rails?_
Above is some shaky video taken out of the side of one of these “trams”. I guess at least I don’t have to walk. The loop buses on the island are also quite convenient and free of charge, which is nice. But the island still feels like a tourist trap – lots of fees and “artificial” amusements.BY OTHER MEANS
One of the most fascinating things about Singapore was the proliferation of rental bicycle schemes operated by the (now defunct) ofo, mobike and others. When I was there, I thought this to be a brilliant idea at first until I saw the litter of bikes parked in inconsiderate locations. I also saw many that were somehow defective, seemingly left there for a long time without any real incentive to collect them. At one point, I was tempted to give them a try, but I didn’t fancy handing over my credit card details to a company I’m not sure I trusted. I wasn’t sure how well it would work given a foreign card either, but I didn’t expect that as soon as I got home to Sydney, the same schemes would start to roll out at home as well! It seems that they have a good set-up for private bicycle usage – this was at my nearest MRT station where they had a row of double-decker bicycle storage. Unfortunately it was quite empty … It seemed a little complicated to use, so I’m glad they put up a sign about how to use the upper racks. Singapore is pretty easy to get around on foot as well. The pedestrian crossings are mainly push-button type – interestingly the signs say “Press For Green Man”, which oddly implies that the main use for the button is to obtain green men and not to cross the road. In Chinatown, I spotted an unusual crossing where there was a card reader – apparently, seniors and disabled people can “tap” their card to enable a longer crossing time as required. This is not something I’ve seen implemented elsewhere. One unexpected find was this banner in Little India, featuring the classic meme-style text which illustrates one thing – they have aparking problem.
While I was there in Singapore, ANZ had transferred its retail arm to DBS and shuttered their ATMs. That was big news I wasn’t aware of at all … not really transport related but I came across it on foot and it was a shock. I thought ANZ was doing well in Asia …CONCLUSION
The transport in, out and around Singapore is quite amazingly convenient. It’s hard not to be jealous, but I suppose it’s easy for a geographically small country to have good public transport. But despite this, they still keep building more lines. I find it hard to explain, although it does seem some of the infrastructure is beginningto show its age.
I could never match the efforts of Land Transport Guru , where I learned a lot about the Singaporean transport network including a lot of practical knowledge about things like maximum travel times and history of various MRT lines. The site is well worth a visit for transport enthusiasts. But I guess Singapore is mostly just a good country to fly through as an interconnection hub. There really isn’t that much to see and keep yourself occupied, unless you like the “tourist trap” style attractions and shopping. One week was good enough for me, so it was onwards to my next destination, where I hoped to see things which were a bit more _up my alley_.LIKE IT? SHARE IT!
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ROADTEST REVIEW: B&K PRECISION/SEFRAM DAS240-BAT MULTI-CHANNELRECORDER
Posted on February 25, 2020by lui_gough
Some of my regular readers may have noticed the blog being quiet again over the past few weeks. That’s not an unusual occurrence, because I was blessed by element14 and B&K Precision/Sefram to have been selected as one of three RoadTest reviewers for their DAS240-BAT Multi-Channel Recorder. This unit is a bit like a data logger and a chart recorder put together. Intended for field usage with internal battery power lasting more than 10 hours, with 20 analog channels expandable to 200 and 12 digital, 4 timing and 4 alarm channels, this unit is quite a versatile universal recorder, especially useful for identifying long term trends or monitoring systems for anomalous behaviour. The unit boasts a wide number of hardware ranges and a large 10″ colour LCD touch-screeninterface as well.
It comes with a whole heap of accessories to get you started as well … with one key feature being the cabled channel module which allows for easy detaching of the recorder from the inputs and pluggable terminal blocks to allow for easy channel reassignment. While the unit has a touch screen interface, it’s also remote-controllable via LAN and optional Wi-Fi, with HTTP, FTP, VNC and Modbus TCP access. It is capable of time synchronization with NTPas well.
It was a tall order to test this unit to verify its full capabilities – it involved setting up many test rigs and spending a lot of time soldering connections … all to put it through gruelling tests which are a characteristic of all of my reviews. Want to know what I think of the B&K Precision/Sefram DAS240-BAT? YOU CAN READ THE FULL _SUMMARY_ REVIEW HERE AT ELEMENT14 COMMUNITY … or read the detailed _RoadTest-in-Depth_ blog sections directly: * Ch1 – Market Survey & Feature Introduction* Ch2 – Unboxing
* Ch3 – User Experience * Ch4 – Remote Control Interfaces & Software * Ch5 – Instrument Performance * Ch6 – Simulated Field Tests* Ch7 – Teardown
(… OR DOWNLOAD A ZIPPED BACKUP PDF ARCHIVE COPY (25MB))
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RECENT POSTS
* Project: DC-to-DC Converter Transient/Quiescent Analysis with R&SNGM202
* SGJPHK2017: Travelling Around Singapore (MRT, LRT, Bus, etc.) * RoadTest Review: B&K Precision/Sefram DAS240-BAT Multi-ChannelRecorder
* Visited: Central Coast Amateur Radio Club (CCARC) 62nd Wyong FieldDay (23 Feb 2020)
* Reverse Engineer: Tenda Beli SP3 Smart Wi-Fi Plug Protocol * Project: Characterising DC-DC Converter Efficiency using R&SNGM202
* Tech Flashback: LCD Digital Compass & Clock (1360 V2.0) * Book Review: Artificial Intelligence: A Guide for Thinking Humansby Melanie Mitchell
* Project: Torture of an old Panasonic CGR18650CG using R&S NGM202 * Note: Swollen Li-Po Cells in a Xiaomi (Mi) Power Bank Pro(PLM01ZM, Nov 2016)
* Project: Spectrum Analysis on NBN Hybrid-Fibre Coaxial (HFC)Connection
* Visited: Mass Transit Railway (MTR), Hong Kong (Mar-Oct 2017) * Visited: HK Tramways, Central to Mid-Levels Escalator System(Mar-Apr 2017)
* Repair: Apple 45W MagSafe Power Adapter (A1374) Cable * Repair: Fan Replacement on a Thermaltake TR2 800W ATX PSU * Visited: MTR South Island Line & Light Rail Transit (Mar-Oct 2017) * Project: HF Radio Time Signal Stations – The “Constant” OnThe Air (Jan 2020)
* Radiofax Update: JJC Kyodo – Still Alive in 2020! * Quick Review: Sandisk High Endurance Video 64GB microSDXC Card (SDSQQNR-064G-GN6IA) * Review: Tenda Beli SP3 Smart Wi-Fi Plug – Not Beli Secure? * Visited: Gwangju (South Korea) Metro System (Apr 2017) * Visited: Daejeon Expo’93 – The Birth (and Death?) of a MaglevDream
* Visited: Daejeon (South Korea) Metro System (Apr 2017) * Teardown: Osram Dulux EL Longlife 20W/827 Compact Fluorescent Lamp * Visited: Daegu (South Korea) Metro System (Mar 2017) * Opinion: Daegu 2003.2.18 Subway Fire – Memorial & Aftermath * QSL Card: Lucy Helton (KD2MFV)’s Ham Radio Project * Visited: Busan-Gimhae (South Korea) Metro System (Mar 2017) * Project: USAF HF Global Communications System Audio Gallery (Dec2019)
* Project: HF Weather Broadcast Audio Gallery – Vol. 2 (December2019)
* Site Update: Happy New Year (and Decade)! * R&S NGM202: F/W 2.016 & Building a Battery Model * Teardown: MikroTik S-RJ01 SFP to RJ45 10/100/1G Ethernet Module * Quick Review: Western Digital Elements 10TB External USB 3.0 HardDrive
* Event: L2 Sydney CBD & Eastern Suburbs Light Rail Opening Day (14Dec 2019)
* RoadTest Review: Omron 2JCIE-series Environmental Sensors * Project: HF Weather Broadcast Audio Gallery (October-November2019)
* Project: Xiaomi Mi Max (2016) Battery Replacement * Project: Extended Torture of an old Samsung ICR18650-26F using R&SNGM202
* Quick Review: Lexar 32GB 633x UHS-I (Class 10/U1/V10/A1) microSDHC Card (LSDMI32GBBAP633A) * On-Demand & Opal Connect: An Audacious Trial Misrepresented? * Review: Seagate Expansion Portable 4TB USB 3.0 External Hard Drive(STEA4000400)
* Review: Toshiba Canvio Basics 4TB USB 3.0 External Hard Drive(DTB440)
* Tested: Generic USB Bluetooth Receivers (PiX LV-B02L, H7X-RX-163) * Review: Orico 2139U3 2.5″ USB3.0 External SATA Hard DriveEnclosure
* Quick Review: Samsung EVO Plus 128GB UHS-I microSDXC Card(MB-MC128G)
* Project: Data Recovery & SMART Post Mortem on a Seagate 1TB7200.12 HDD
* Tech Flashback: Generic Light-Up Mobile Phone Keyring * Visited: CeBIT Australia (ICC Sydney, 29-31 Oct 2019) * Opinion: Maccas – Get Your App Together!*
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RECENT COMMENTS
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