>Was thinking of using cadium sulfide cells (light >resistors) in place of radio waves on a pic. I seem to remember Popular Electronics, or one of the other "Popular xxx" American magazines, doing a Theremin using Cds cells back in the 1960s. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist