In our latest PyroElectro tutorial, we show you how to make a basic optical encoder for any mechanical system. Our example setup uses a simple printer pully and motor system. The write-up includes all source code, schematics and parts lists you'd...

A True Random Number Generator seems to be a mathematical myth. However, we can still get pretty good random number generators. This AVR uses noise sampled from a transistor in the breakdown region which should be seemingly random. The schematic...

While surfing around I ran across the Z80 Text Scroller by Tim Williams. Tim's website has a lot of his personal projects and they all have the DIY feel that I love. Take a look at the text scroller and his site, hardware schematics & software...

The PICAxe serial keyboard was built to interface with a XENIX computer. It is fairly custom when compared to the way keyboards work now-a-days. However, I felt the project was noteworthy enough to take a look at. Hardware schematics & software...

This project uses a 12xx series PIC to control the rear light to go on a bicycle. The main function is for when you are riding your bike at night so people can see you. Hardware schematics, PCB layout & software is all there. Avid bicyclists...