Motion Tracker Using 4 PIRS, servo and Arduino Uno
Channel: Jimmy Demello
Date: 2014-03-05

Here is a simple application of using PIRs as simple switches to place a servo in a particular angle so as to simulate head motion tracking. Kind of fun to play with and would be great for Halloween.
Only 45 lines of code. See my robot at letsmakerobots.com here:
http://letsmakerobots.com/node/40600