Most of the r/c peizo units are using a Tokin or Murata sensor. The new Futaba gyros uses these; http://www.spp.co.jp/sssj/sirikon-e.html which have less drift problems than the piezos. All are hard for hobbyists to obtain. > There are lots of solid state gyros out there: > http://www.analogdevices.com/index_noflash.html Michiana R/C Choppers http://www.mrcc.info miked@mrcc.info -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads