>Doing this with an HMD sounds like you are creating a headache generator. It really won't be bad at all if the displays have an appropriate (2 frame) peristance. Bob Ammerman RAm Systems (contract development of high performance, high function, low-level software) -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads