Electronics Articles - The Lost Continent of

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I've been using my own private git server for years and years, but have decided to be a little more public. I've settled on Codeberg.org, a donation-supported service.

Reading the news can erode your faith in humanity. Learning about the work being done on Africa's Great Green Wall reawakens mine. What an incredible project!

My 3D modeling skills are still pretty basic, but I did manage to scratch a personal itch and made an anti-vibration stand for external hard-drives. The size is customisable, and when 3D printed in TPU does a good job of keeping the drive upright — and quiet.

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AVR Multi-Programmer

I'm about 10 years late to the party, but in this project a cheap Arduino UNO clone becomes a very handy AVR programmer for everything from a little 8-pin ATtiny13 to a 28-pin ATmega.

Automatic Low-Voltage Cutoff

Running a battery completely flat can permanently damage it, lead-acid and lithium-polymer types especially. I put together this circuit to protect a small lead-acid UPS battery. It's cheap, has a high current capacity, and use only very common parts. Did I mention that it's cheap?

Cheap Electronics as a Sudoku Alternative

Today's challenge is to drive a cheap 8-digit LED display. Months ago I bought a cheap module from Aliexpress. Too cheap. Instead of a nice smart LED driver chip as I had expected, it features instead the jewel of 1980's technology: a pair of 74HC596 shift registers. Let's explore this puzzle!