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Here's how I did mine using a 12V vent motor - http://www.youtube.com/watch?v=DCNL0n1CkJk&list=UUKKBTwYyVYxkpa0_9pqQ13A&index=7&feature=plcp

This is the controller I designed to trigger my projection remote as well as to start my VSA program for my 3 axis skull routine with a PIR. It's a mechanical solution that uses a $10 Picaxe...

If your looking for a controller which doesn't need to be programmed by computer and can control several different props, take a look at the EZ-8 from EFX-TEK. It's a button banger (you just press...