Just curious, is it possible to harvest an Am-241 module from a smoke detector and somehow make a low power electrical generator from it? Something to power an MSP430? Am-241 undergoes alpha and beta decay, but Wikipedia also says it emits gamma radiation. Probably a health hazard to play with these things. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .