I built an alarm clock that wakes me up in the morning by slapping me in the face with a rubber arm. I picked apart a clock, wired it to an Arduino UNO and controlled a 165 rpm brushless DC motor through a relay. Electrodoodle by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/...) Source: http://incompetech.com/music/royalty-... Artist: http://incompetech.com/