an Arduino board (this was developed on a Leonardo, but should work with any other Arduino board) one Arduino digital pin for each relay, by default pins 2 to 8 are used 1 to 8 relays which can be ...

Arduino powered car heater timer. 2 and 3 pins is relay, i used two relays for 230v that I can make sure that my car starts to warm up even if the second relay breaks down, the intention was to test ...

Droplet and StackAR, developed by MIT’s Media Lab, allow users to set timers or program an Arduino using light-based communication. By pressing the tool against a screen, flashes of light can ...