My brother was appalled that I would explose my kids Basic Stamp and suggested coding for a real computers. He pulled out an AVR chip, connected an LED and proceeded to make it blink. This is Hello World for microcontrollers.
Blinking Morse Code as a simple extension of my brother's blink code.
Video Test Patterns as a simple extension of blinking morse code.
Video Circles incrementally solved the second-order polynomial for a circle
American Glory kinetic sculpture responds to 9/11 flag waving with two rc-servos waving a plastic flag.
Cybords series of projects building on statistical signaling.
Throwie Talkie mashup with Graffiti Research Lab.