Using a paper model of Wall-E, he added some servos and connected it to his computer using a PIC. The Mail-E robot is actuated by three 9g mini-servos, and controlled by a SD21 servo driver and a picaxe 18x
We think it’s An overkill for a simple mail notifier, but still this is very nice. Mail-E has independent arm rotation and head rotation. He admits that the PIC processor is major overkill and plans some upgrades such as making it wireless and using a little better suited chip to control it. Not bad for a proof of concept.