> How about some details of where to get Kynar film, how to > attach electrodes, etc. to demonstrate this effect? > This sounds like a way cool thing to know about. > Kynar is available from AMP Inc (the big connector makers) The only address I have here is Valley Forge P.A. Kynar is a Piezo Film that can be used for hydrophones (my main use), speakers (above 2kHz), contact microphones, pyro sensing (.. very good IR detectors) and very high reliability/cycle life switches (dynamic only though, not absolute).. Gottlieb use it in Pinball Machines now. Electodes are vapour deposited on the material so can either be inserted in a pressure contact or a type of rivet attached to it. The AMP Basic Design Kit for Piezo Film Sensors is a great start, with many samples, applications etc. Quite a range of off the shelf sensors/transducers in various form factors are available from AMP. I should be on their sales team. Oiii... where's my commission. _____________________________ Lance Allen Technical Officer Uni of Auckland Psych Dept New Zealand _____________________________