http://www.mds975.co.uk/Content/crystalsets1.html
AM Radio "crystal diode" receiverÂ
I have the diodes and resistors
Independent study of topic we did not address in AP Physics
?????
Rimba Tubes "Slap Tubes"
http://makezine.com/2010/12/01/theyre-called-slap-tubes/
Stirling Engine
http://diystirlingengine.com/category/homemade-stirlings/