Jinx wrote: > Can anyone here help out ? I probably could do it but for the fact I've > simply got so much else on and it would be very low priority > > My design referred to is here > > http://home.clear.net.nz/pages/joecolquitt/emouse84.html Hi Jinx, Can't help you with the code but couldn't you lose the opto for the RS232 output? I've used a PNP transistor to do the +ve level (from the 5V supply) and a resistor back to the -ve supply so it swings +/-5V. Just a thought. :-) David... -- ___________________________________________ David Duffy Audio Visual Devices P/L U8, 9-11 Trade St, Cleveland 4163 Australia Ph: +61 7 38210362 Fax: +61 7 38210281 New Web: www.audiovisualdevices.com.au ___________________________________________ -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.