Category Archives: Electronics

Great AA Alkaline Battery Test – Addendum: 25mA Constant Current Tests

For those following along, they’d probably realize by now that I have left the country and are officially on holiday in the slightly-warmer-than-average-for-this-time-of-year Hong Kong. I had originally planned to make this post before I left home, but things got … Continue reading

Posted in Electronics | Tagged , , , , , , , , , | Leave a comment

Experiment: Sylvania Lynx CFTE 42W Cool White Deluxe CFL Tubes

Every so-often, I drop into my local thrift shop because I just so happen to be passing by on another errand and have some time to spare. It’s often a good experience to sift through the random items for sale, … Continue reading

Posted in Electronics, Lighting | Tagged , , , | 1 Comment

Repair: Click Surge-Protected & Sansai Switched 4-Outlet Powerboards

Powerboards are very simple and inexpensive devices used to convert one socket into multiple sockets on a (supposedly) temporary basis. Every house has a number of these devices, with basic devices simply bussing together the pins and more complex devices … Continue reading

Posted in Electronics | Tagged , , , , | 2 Comments

Teardown: RadioShack Amplified Telephone Earpiece (43-229)

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 … Continue reading

Posted in Audio, Electronics | Tagged , , , | 1 Comment

Teardown: FiiO E5 Headphone Amplifier

The FiiO E5 was a low-cost but decent performing compact headphone amplifier a few years back. The unit bore a vague resemblance to an iPod Shuffle clip-version, and was relatively compact with integrated rechargeable lithium-polymer battery. Since someone didn’t want … Continue reading

Posted in Audio, Electronics | Tagged , , | Leave a comment

Teardown: Swollen Xiaomi Redmi Note 2 BM45 Battery

While I was using my Xiaomi Redmi Note 2 the other day, I realized something strange was happening. It didn’t quite fit in its case as well as it used to, the screen felt a little like it was bowing, … Continue reading

Posted in Electronics, Telecommunications | Tagged , , , , | Leave a comment

RoadTest Review: Texas Instruments TPS56C215EVM-762 Evaluation Module

It’s new year’s eve and I’m busy working away. Why you ask? Well, I’ve been fortunate enough to be the recipient of another RoadTest item – this time, it’s a Texas Instruments Evaluation Module. The module in specific is the … Continue reading

Posted in Electronics | Tagged , , , , | Leave a comment

Salvage Season: Pt 5 – Fisher-Rosemount Systems Model 275 HART Communicator

“All this gear … and I still can’t get to your heart.” Welcome back to the salvage season series of posts. Lame joke aside, this post will be about a Fisher-Rosemount Systems Model 275 HART Communicator. So … what is … Continue reading

Posted in Electronics, Salvage | Tagged , , , , , , | Leave a comment

Salvage Season: Pt 4 – Lighting & AV Stuff

The salvages continue with lighting and AV related equipment. Of course, some of this isn’t that useful nowadays, but it’s more interesting from a “wish fulfillment” and philosophical perspective. Lighting (with Philosophical “Light-Bulb” Moments) It’s no big secret that LED … Continue reading

Posted in Electronics, Lighting, Salvage | Tagged , , , , , , | Leave a comment

Power Bank Endurance Test – Hillo Power Jin Gangxia (Part 20 – Final)

It’s Boxing Day, and while a lot of people are outside partaking in the shopping frenzy of underwhelming discounts, I’m firmly sitting at home plodding away at some data analysis to deliver this last part of the power bank endurance … Continue reading

Posted in Electronics, Power Bank | Tagged , , , | Leave a comment

Great AA Alkaline Battery Test – Pt 4: Cell Physical Characteristics

After the rather interesting results in the previous section, I was curious as to who actually manufactured the cells for the lesser known brands, and whether that could be determined just by examining the physical characteristics of the cells. Given … Continue reading

Posted in Electronics | Tagged , , , , , , , , , | 2 Comments

Great AA Alkaline Battery Test – Pt 3: The Results

If you’ve made it this far, congratulations, you’ve earned the right to read the results! If not, you could be doing yourself a big disservice and not understanding the true intricacies that underlie the subject of battery testing and the … Continue reading

Posted in Electronics | Tagged , , , , , , , , , | Leave a comment

Great AA Alkaline Battery Test – Pt 2: The Contenders

Welcome to the second installment in the Great AA Alkaline Battery Test series, where the contenders for testing are presented. This post is one of the most image heavy posts I have ever delivered, so apologies if my webserver falls … Continue reading

Posted in Electronics | Tagged , , , , , , , , , | Leave a comment

Great AA Alkaline Battery Test – Pt 1: Battery Testing Fundamentals

Regular readers would probably know that I have a love of batteries, and their associated test equipment. Maybe it was the fact that they were expensive, but pervasive, and my enjoyment as a child relied quite heavily on batteries to … Continue reading

Posted in Electronics | Tagged , , , , , , , , , | Leave a comment

RoadTest Review: B&K Precision Model 8600 DC Electronic Load

It’s a rather late night for me – as it has been for the past few weeks. But that’s not without reason, as a rather useful piece of equipment headed my way and my review was due. I had a … Continue reading

Posted in Electronics | Tagged , , , , | Leave a comment

Power Bank Endurance Test – Hillo Power Jin Gangxia (Part 19)

This is one of those ongoing experiments which just seems to keep dragging on and on. Initially, I thought I’d torture a relatively unknown power bank by cycling it over and over on the test rig, expecting to see it … Continue reading

Posted in Electronics, Power Bank | Tagged , , , | 5 Comments

Review: Raspberry Pi 3 – More Pi, No Cables Attached?

It’s been a while since I checked out the Raspberry Pi, as my fleet of original Raspberry Pi Model B, B+ and Pi 2 Model B’s have all been working well doing their little jobs around the house. I haven’t … Continue reading

Posted in Computing, Electronics, Raspberry Pi | Tagged , , , , , , , , , | 4 Comments

Hack: Customize the LED Shake-Stick Images

As I managed to construct the LED shake-stick kit just yesterday evening, I wasn’t entirely satisfied with its operation. For one, the images weren’t particularly inspiring. I mentioned that it should be possible to replace the images in the ROM … Continue reading

Posted in Computing, Electronics | Tagged , , , , , , | Leave a comment

Project: AT89S52-based LED Shake-Stick Kit

Just recently, I built an AT89S52-based LED Heart and an LED Clock Kit, so I wondered just what else is out there that is AT89S52-based. Searching around on eBay led me to a “shake stick” kit for AU$4.37. It looked … Continue reading

Posted in Electronics | Tagged , , , , , | 3 Comments

Project: AT89S52+DS1302-based LED Clock Kit (EC1204B-Equivalent)

Since I started along the line of garish LED-adorned kits, I thought I’d order a few other kits built around the AT89S52. In this case, it was a clock based around the AT89S52 80C51 microcontroller and a DS1302 real-time clock. … Continue reading

Posted in Electronics | Tagged , , , , , | 3 Comments

Project: AT89S52-based Multi-Coloured LED Heart Kit

As my radio kit-building adventures have reached the “bottom” of the eBay well, with most of the kits available being built, I decided to branch out into other “low cost” kits to see what they are like. Most of the … Continue reading

Posted in Electronics | Tagged , , , , , | 4 Comments

Review, Teardown: “Generic” BT-168 Battery Tester

A short while back, I posted about this generic battery tester, which was a cheap and nasty clone of a model which was quite popular, which I used frequently as a child. In my quest to buy it, I came … Continue reading

Posted in Electronics | Tagged , , , , , , , , | Leave a comment

Power Bank Endurance Test – Hillo Power Jin Gangxia (Part 18)

This is one of my ongoing experiments to see how a rather no name power bank ages with charge/discharge cycles, and it’s been quite surprising all the way. This is the 18th installment, meaning that we have reached a total … Continue reading

Posted in Electronics, Power Bank | Tagged , , , | Leave a comment

Project, Reverse Eng, Repair: ATmega328-based “Transistor Tester” Kit

A common complaint and reason for the falling popularity of electronic kits is that none of them really let you build something that’s really useful that you couldn’t buy pre-built at a lower cost. I believe this complaint does have … Continue reading

Posted in Electronics | Tagged , , , , , , , , , , , | 7 Comments

Project: YYDZW BH1417F-based Stereo FM Transmitter Kit

While I was browsing the listings of electronics kits on eBay, I came across this particular stereo FM transmitter kit but I didn’t think much of it. In fact, given the chance to buy it, I passed over it twice. … Continue reading

Posted in Electronics, Radio | Tagged , , , , , , | 1 Comment

Project: Sainsmart Forty-9er “3W” 7.023Mhz QRP CW Transceiver Kit

Even though I’m insanely busy, it seems I just can’t help myself when it comes to cheap Chinese kits available on eBay. Of course, having built most of the cheap radio-based kits already, there isn’t really that much to build … Continue reading

Posted in Electronics, Radio | Tagged , , , , , , | 2 Comments

Project: CD2003GP+SC3610D FM Receiver w/LCD Alarm Clock (74-108Mhz)

My little “mission” to build random Chinese radio-kits from eBay continues with this rather odd and difficult kit. Unlike the other kits, this is the first to come with an LCD display, but is advertised strangely as FM Radio Kit … Continue reading

Posted in Electronics, Radio | Tagged , , , , , , | 3 Comments

Power Bank Endurance Test – Hillo Power Jin Gangxia (Part 17)

In this long ongoing experiment, I attempt to see just how a “no name” power bank stands up to repeated cycling. My expectations were fairly low at the outset, but it seems I’ve been proved completely wrong, as now I’m … Continue reading

Posted in Electronics, Power Bank | Tagged , , , | Leave a comment

Project: S66D/E 9018-based AM Radio Kit

If you’ve been wondering about all the random radio kits I’ve posted about recently and had the thought “Gee, that guy must’ve just looked for any cheap radio kits on eBay and bought them all!” You’d be absolutely right. In … Continue reading

Posted in Electronics, Radio | Tagged , , , , , , | Leave a comment

Project: 7.023Mhz PIXIE_V3 QRP CW Tranceiver Kit

After I stupidly decided to push the limits on the PIXIE_4.1 and subsequently destroyed its amplification, I wasn’t too concerned. Being the prepared sort, when it comes to low-cost kits, I sometimes buy two in anticipation that maybe some parts … Continue reading

Posted in Electronics, Radio | Tagged , , , , , | Leave a comment