dfu-programmer is an implementation of the Device Firmware Upgrade class USB driver that enables firmware upgrades for various USB enabled (with the correct bootloader) Atmel chips. This program was ...

I'm using two different (but very similar) fingerprint readers here, an R307 and a slightly different, Adafruit-compatible version. I show here how to enrol fingerprints using the Windows (only) demo ...

The Joule Thief Circuit is a simple and clever electronic design that can power an LED using a nearly dead battery.