Soldering + Touch switches

http://erosenthal.com/NYUITP/Session_10.html

http://erosenthal.com/NYUITP/Session_11.html

http://erosenthal.com/NYUITP/Session_12.html

https://www.sparkfun.com/products/10267

http://en.wikipedia.org/wiki/Nyquist_frequency

http://talkingelectronics.com/projects/TouchSwitch/TouchSwitch-1.html

http://www.youtube.com/watch?v=3NN7UGWYmBY&feature=related

http://www.youtube.com/playlist?list=PL2B5F5DC8F7785312

PCB Design