Well I have to be about the dumbest person and why this eluding me on how to correct this is beyond me. Anyway I am working with a 16f877 and I've got a pressure sensor thats range is .5vdc to 4.5vdc and I am trying to get the full range of the AD but I am stuck. It works perfectly when I hook it up my AD output reads .47v which is perfect since there is some degree of percission. I don't know why they don't make these to read 0v to whatever but they don't So my quesiton is how to programatically drop that first .5v and still take advantage of the entire 1-1024 range of the AD converter or is there a better way?


Thank you.
David