ADC

http://en.wikipedia.org/wiki/Analog-to-digital_converter
http://embedded-lab.com/blog/?p=379
http://www2.tech.purdue.edu/eet/courses/referencematerial/atmel/Port_Stuff/PortA_ADC.htm

iOS - Iphone Programming

Static LIB  -  http://www.icodeblog.com/2011/04/07/creating-static-libraries-for-ios/
Sample Project - http://mobile.tutsplus.com/tutorials/iphone/learn-ios-game-development-by-example-10-projects-to-get-you-started/
                       - https://github.com/urbanairship/ios-samples

perpetual motion

mostly fake --> http://www.youtube.com/watch?feature=player_embedded&v=287qd4uI7-E

davinci design http://www.youtube.com/watch?v=r66E6QLsMLg

http://www.youtube.com/watch?feature=player_embedded&v=usBFNJSiU1g