thankyou to all that wrote in reply .. i sat back and had a bit of at think about this and pondered what the Hoff would do in this situation and it finaly came to me to make a buffered R,C network and process the signal that was too fast for arduino to read and break it down to an analog reference voltage and then write a sketch that picked a center point and referenced the output from that it works and i even built in an adjustable center dead zone to stop any nasty center oscillations .. cheers again for any replies
