Looking for an application for the button pads, we ultimately settled on re-creating this classic. It blinks. It makes a lot of noise. And it's guaranteed to suck you away from doing any real work. Project description, more information and ordering can be found at https://www.sparkfun.com/products/7947 Simon Schematic: http://www.sparkfun.com/datasheets/Prototyping/General/Simon-0E-v23.pdf Simon Assembly Procedure: http://www.sparkfun.com/datasheets/Kits/Simon-assembly-instructions-v23.pdf Github Page: https://github.com/sparkfun/Simon WinAVRSimon-v21-Firmware: http://winavr.sourceforge.net/http://www.sparkfun.com/datasheets/Widgets/Simon-v21.zip Simon-v12: http://www.sparkfun.com/datasheets/Widgets/Simon-v12.zip Simon-v1 FirmwareCC5x: http://www.sparkfun.com/datasheets/Widgets/Simon-v1.ziphttp://www.bknd.com