> >Not to play expert or anything, but I guess that means I'd need a negative >supply voltage for the opamp stages. No, that's the whole point of rescaling it to battery/2 -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads