Category Archives: Electronics

Project: 7.023Mhz PIXIE_4.1 QRP CW Transceiver Kit

Going along the same vein of “radio kits”, this one is a little bit different. This one is a do-it-yourself PIXIE 7.023Mhz QRP transciever intended for amateur (ham) radio morse code (CW) usage. It doesn’t have many specs, but apparently … Continue reading

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Project, Reverse Eng: Hex3653 AV2B Stereo FM Receiver Kit

When I built my last radio kit, I lamented that there were some kits out there which were mainly black-box which don’t offer that much of an opportunity to learn about what is actually going on. While I was dismissive … Continue reading

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Review, Teardown, Reverse Eng: Generic Battery Tester

As a kid growing up in the 90’s, one fond memory I had was sorting through piles of batteries to see which ones were good and which ones needed to be discarded or recharged. With many toys and appliances using … Continue reading

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Review, Tested: Generic USB FM Transmitter (FM_MIC_V5.0.9)

It wasn’t too long ago that I purchased a generic pocket radio kit on eBay and built it. But as anyone knows, when it comes to shopping online for cheap Chinese goods, there are often lots of things that can … Continue reading

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Review, Teardown: Askborg ChargeCube 20800mAh Powerbank (M021)

When it comes to power banks, while some users are content to have a moderate-sized unit that charges their phone a few times, there are other users who really demand as much capacity as practical. For those users looking for … Continue reading

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Repair: Apple Macintosh PowerBook 100 AC Adapter (M5140X)

Since I made my posts about the PowerBook 100 that has “become” mine, I faced a dilemma as to what to do next. Even though I didn’t get too many people chipping in their opinion, it seemed that a full … Continue reading

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Visited: ElectroneX 2016 (14-15 September 2016)

ElectroneX is one of the major electronics design and assembly exhibitions in Australia, and they alternate between Sydney and Melbourne on an annual basis. Two years ago, they were in Sydney, and I was helping out element14 exhibiting there at … Continue reading

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Power Bank Endurance Test – Hillo Power Jin Gangxia (Part 16)

As far as experiments go, this is probably the longest and least exciting experiments of them all. It started years ago when I wanted to see just how long some randomly branded Chinese lithium-polymer cell based power bank would last, … Continue reading

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Experiment: Time to EPROM Erasure by UV Lamp & Sun?

I’ve always been fascinated by the beauty of EPROM chips with their erasure windows giving you a clear look inside the package. Because of my fascination, I ended up buying quite a few chips, an UV eraser that needed some … Continue reading

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Review, Teardown: Nitecore HC60 1000lm USB Rechargeable Headlamp

After I wrote my review of the Nitecore MH10, I decided to ask Nitecore (nicely) if they would like me to review their other products, as they had a reviewer’s section on their site. To my surprise, they were happy … Continue reading

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Project: Paeansonic CF210SP CD9088+CD7642 AM/FM Radio Kit

It’s been a bit quiet around here lately – I’m just swamped with work, and it never quite goes away, but neither does the desire to do something for my own enrichment and enjoyment … and the desire to blog … Continue reading

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Post-Mortem: Apple 60W MagSafe Power Adapter (A1344)

Unlike most of my other posts which are relatively straightforward, this post has a little story behind it. In March, Matson of Chicago, Illinois, USA contacted me about his “dead” Apple 60W MagSafe Power Adapter and wondered if I’d be … Continue reading

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Tech Flashback: Canon DM-2500 Intelligent Organizer

Seeing as I’m not having too much luck getting to sleep, I might as well do something productive, so here comes another post. Apologies in advance if I make any mistakes … It’s hard to imagine now in an era … Continue reading

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Weekend Probing Pt. 2: Keweisi KWS-V20 USB Tester IC Connections

What started off as a little exploration led me deeper to try and better understand what was going on with the Keweisi KWS-V20 USB Tester. Even though I don’t have any specialist bus sniffing gear, I decided to just wing … Continue reading

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Weekend Probing: Keweisi KWS-V20 USB Tester IC Connections

After doing a quick review and test of the Keweisi KWS-V20 USB tester, the whole issue of the unknown microcontroller IC, the EEPROM which holds the accumulated charge and the LCD display really bugged me. I thought of the possibility … Continue reading

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Review, Teardown: Keweisi KWS-V20 USB Tester

It’s almost been one year since I’ve looked at “USB charger doctor” style devices, but having reverse engineered, tested and modified one, I didn’t think I’d ever bother with them again. That was, until I saw the Keweisi KWS-V20 USB … Continue reading

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Review: Jawbone UP2 Wireless Activity & Sleep Tracker (JL03)

When it comes to fitness trackers, aside from Fitbit, the next name that most comes to mind is Jawbone. Unfortunately for them, things have been a little rocky, with them taking Fitbit to court over hiring away their employees and … Continue reading

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Tech Flashback: Dick Smith’s Funway 2 Project 7: Pocket Transistor Radio

Since the positive reception to my posts about Dick Smith’s Fun Way into Electronics book series (Part 1, Part 2 & 3), I’ve always been meaning to put up more posts about the series and its projects. It was amazing … Continue reading

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Review: Nitecore MH10 Cree XM-L2 1000lm USB Rechargeable Flashlight

A few weeks ago, I was looking around wondering what I should buy myself, since I haven’t had a new toy for a while now and I really wanted to treat myself. I wanted something that would come in handy, … Continue reading

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DIY: Build a 70cm Band Yagi for Amateur Satellite Tracking

It’s been a long time since I’ve chased any amateur satellites. It’s been a long time since I’ve had the time to chase them, and sadly, things have changed. In the seven years or so, satellites I once “knew” as … Continue reading

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Power Bank Endurance Test – Hillo Power Jin Gangxia (Part 15)

Welcome to the fifteenth installment of this relatively unexciting experiment to see how long a modestly sized “unknown-name” Chinese Li-Poly power bank would last under continual cycling. Those who have been following along will know just what this means – … Continue reading

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Modification: Manson HCS-3102 Power Supply Output On/Off Switch

Three years ago, I purchased a pair of Manson HCS-3102 programmable switch-mode power supplies. These were not particularly expensive supplies, and judging by some of the noises they made and the granularity of the programming and read-back, weren’t particularly high … Continue reading

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Quick Review: Arduino/Genuino 101 Board

I was lucky enough for element14 to send me a little surprise “care package” just last week. As it turned out, it contained a Genuino 101, the latest release from Arduino. This board has been slated to be the “next … Continue reading

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Power Bank Endurance Test – Hillo Power Jin Gangxia (Part 14)

Almost two years ago, I started an experiment to see just how well a random no-name power bank would survive under repeated cycling, and to chart its “demise”. While I had some notion that it might have failed early due … Continue reading

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Review: Fitbit Zip Wireless Activity Tracker

It’s not often it happens, but there was another gift that headed past my table in the past months, and it was a Fitbit Zip. As I recently reviewed the Fitbit One, most of the comments about apps and setup … Continue reading

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RoadTest Review: Keysight Technologies E36103A Power Supply

If you think all I have been doing is blogging about my holiday and LED lighting … the truth is that there’s a lot more going on behind the scenes. I was fortunate enough to be selected by element14 for … Continue reading

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GearBest: Counterfeit Item, Uncooperative Staff, PayPal Dispute Needed

With the constant influx of innovative, new, low-cost and high quality from lesser known Chinese manufacturers, a constant battle is to find a source of these products with a good price from someone that you can trust. Online marketplaces are … Continue reading

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Power Bank Endurance Test – Hillo Power Jin Gangxia (Part 13)

This is one of my longest running experiments – an experiment to see how well one particular power bank handles repetitive cycling, just to see how the lithium polymer cell and the electronics handle cycles. This is the 13th part … Continue reading

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Teardown: Failed Philips Genie 14W & Tornado 20W E27 CFLs

Another long weekend, so a good excuse to add some more posts. This post has a double serving of failed Philips CFLs – a Genie 14W and an old style Tornado 20W. These CFLs were used by the strata for … Continue reading

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Review, Teardown: DETA DET190 7W Warm White Dimmable LED Downlight

Given that LED lighting is all the rage at the moment, is it a great surprise that another LED product comes up for review? Not at all. This post looks at the DETA DET190 7W Warm White Dimmable LED Downlight, … Continue reading

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