Light Up Your People

Infrared diodes and detectors make things fun and magical. We are used to touching or flipping a switch to turn on lights. A simple transistor circuit with an infrared detector and the lights change with a wave of your finger. My circuit boards are simple and all of the parts... Read more »

Cheap, Friendly, and Precise PCB Etching

You can’t throw a rock without hitting a tutorial on etching your own PCBs. They’re everywhere, and there seem to be as many techniques as there are hackers. So why am I bothering to write another one? Well, there wasn’t any single procedure that met all my goals, so I... Read more »