In this video, I evaluate a tower heatsink and combo provided to be my Seeed Studio: Background I’ve already done a blog post on Raspberry Pi4 cooling where I tried a Raspberry Pi 4, both with and without a fan. I investigated whether you really needed a fan (my conclusion generally being “it depends”) and …
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Supercapacitor Uninterruptable Power Supply (UPS) for Raspberry Pi
In this post, I build a couple supercapacitor UPS boards for my raspberry pi projects. Motivation For my Convergent restoration, I decided to build an RASCSI to replace some failing SCSI hard drives. The RASCSI is a SCSI emulator built using a raspberry pi. Problem with these types of emulators is that if you carelessly …
Read MoreThe Hayes Chronograph, a Remake for 2020
I couldn’t find myself a Hayes Chronograph, so in this video I just went off and built one… Purpose I always wanted a Hayes Chronograph, but I seem to miss the opportunity to acquire one, every time the opportunity presents itself. So I decided that in 2020 I would just have one … or else. …
Read MoreTandy 1000 Upgrades / PS2-Tandy Keyboard Adapter
In this video, I spiff up a Tandy 1000 that I bought on ebay: Purpose: A Tandy 1000 was the second computer that I owned, the first was a Tandy CoCo. Note that I keep a slightly different mental “computers that I owned” list and “computers that I used list”. There are a few computer …
Read MoreRestoring a Convergent Technologies NGEN PC/Workstation (Burroughs B25 / Unisys)
In this set of videos, I work on getting a used Convergent Technologies NGEN computer up and working: In the second video, I figure out the pinout for the 25-pin connector, and I get the keyboard working and the video displayed on an MCE2VGA. In the third video of the series, I design and build …
Read MoreRaspberry Pi Controlled DC Load
In this video, I build a DC electronic load that’s controlled by a raspberry pi. Purpose A DC Load is useful for testing lots of different things. If you have a power supply and want to make sure it’s able to deliver its fully designed potential, then you can use a DC Load to test …
Read MoreHot Shoe to 1/4-20 Quick Release Magnetic Mount for LumeCube
Short diversion from the usual electronics posts, while I talk about my new camera light… I designed and 3D printed this magnetic quick release mount to attach a LumeCube v2 that I recently purchased to my DSLR camera. Purpose I noticed recently that my camera lighting is sometimes lousy, the Polaroid light that I had …
Read MoreBuilding a Power-over-Ethernet (PoE) Power supply using a DPS5005 module
In this video, I design an build a PoE-powered lab power supply. Purpose What can I say, I like building power supplies. 🙂 Seriously though, I’ve been looking for a reason to play with these DPS5005 and related modules ever since seeing them on popular forums and video blogs. The DPS5005 is relatively well regarded, …
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