Help me make a light watch for a prank! Answered
For reference, here is a video: http://www.youtube.com/watch?v=G5zCiBeQxRI&list=UUCsj3Uk-cuVQejdoX-Pc_Lg&index=3&feature=plcp
Can someone help me with making a watch that can make a big flash on command for doing pranks like these. He has someone near his wrist, and I want it to be a watch if possible. How can I begin, I just need ideas. Could it ever be wireless, or how should I do it?