Even if you don't know what an Arduino board actually is (in which case, ), chances are you've excitedly shared a link with your friends about something powered by Arduino. This wondrous open-source ...

This article describes how I have set up a simple “door-sentry” at home. The door-open detector is designed to alert you to an unauthorized entry in a confined area. It uses a little ATtiny85 ...

If you buy expensive computer speakers, they often have a volume knob you can mount somewhere on your desk so you aren’t dependent on the onboard volume control. [Kris S] decided to build his own ...