Peter got an Arduino board for his birthday. An Arduino is a tiny standalone computer that can connect to all sorts of input and output devices. After the obligatory blink sketch, he put a variant together that blinks back and forth between a red LED and a blue LED.
Here he is waving it in front of the slow camera in Chris’ iPhone.
And here he is messing around in the dark with it.
Tonight we got a potentiometer hooked up to control the speed of the flashing leds.