>> Great point in putting a transistor on the USART output. In hind sight, why >> didn't I think of that. ha >Just remember that a transistor in the common emitter configuration, as >suggested, will invert the signal. Which is why I explicitly pointed out he would need an inverter on the master receive input, but I did not point out why. :) -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu