I want to create my own hardware transponders for lap counting software. I have lap counting software that accepts Transponder inputs via rs232. The problem is that the Transponders are very expensive and im thinking about using my own Transponder. Ive seen on the web software that uses rs232 and IR remotes to control a PC. So i want to write my own software that will take an IR input. convert it to the string the lap counting software needs to keep track of laps. So really is there a way to use java to send a signal to say comm2 even tho there is nothing connected to it? I would of course have the lap software set to comm 2 to wait for the input.