Hi everyone.

I am hoping to build a budget timing system. I have found pages on how to build a photocell detector, with a laser, so when the beam is broken it can activate buttons on a stopwatch or when connected to a printer port be connected to a piece of budget timing software.

My question is if I build one can I write VBA code to accept an input from the photocell if it is connected to the computer? If not, by way of just connected wires to a printer port or such like, then what if I was to use Arduino?

Excel would be much better as I can then play with the data and also drop it straight into our results sheet. If this is just not possible though I will have to look at software instead.

Thanks for your help. KAL