Yes the projector is for the rest of the racers to see. It will display the real time race times and laps for each lane. There are a few programs out there that simply rely on the printer port for a on or off switch set up with light detectors and a bank of light over them, But the windows timers are not very accurate as far as timing go's. I am just trying to do this myself to see if I can improve on it. I need to time 2 cars and need a way of manually stopping the timers when there is a crash. I am just starting and will work these details out on my own I just needed a starting point. Should the 1/100th second timing be done on the pic and sent to the PC or should the pic only send a signal that the light has been tripped and do the timing in windows. VB does have a few different ways of timing so maybe one of them is better. If the pic and serial port can handle a real time 1/100th second update I will use it for timing if not I will only use it to start the windows timer.