With this free web app, you can build circuits from scratch using three popular Arduino boards — Uno, Nano, and Mega — and any of the 50+ hardware components, ranging from the basic mini ...

It’s worth noting that the actual USB interface is being done with a stand-alone controller, so the Arduino here is being used purely to drive the lighting effects.

Two MIT Media Lab students have created an electronics circuit building kit called Makey Makey, that turns almost any object into a computer touchpad or key input.

While RFToy is Arduino code ... The 128×64 pixel OLED screen and 3 button interface make it easy to set up simple ... Something else in the power supply circuit? Check out [Ray’s] demo ...