Thanks to All who replied. I may go down the software route, I don't know if anyone on this list lives in England, but as far as I know the only place I can get pics is from a firm called Maplin, who seem to have stopped stocking all the pics that they had said had built in serial I/O. I will be seeing what pics I can get and what programmers are easy to build. Thank you again for your time. Ian. (replies Snipped)