Hi Folks,

I'm designing a little PIC-based gadget that will have 8-10 variable paramaters that I'll store on-board the PIC.
I'd like people to be able to configure this gadget by means of a PC program. The program will have the nice interface and do the
necessary calculations, but ultimately the 8-10 8-bit variables that will result need to be delivered to the PIC. I want to keep
cost and weight down, so my idea is to use a phototransistor on the PC board to watch a "flashing box" on the monitor that sends
serial data from the PC program. The user would hold the board up to the monitor, hit a key, and the data would be transferred.

Has anyone done anything like this before? I think it would be relatively straight forward, but I'm not sure how to filter and
massage the input from the phototransistor. Any help would be appreciated.

Thanks,

Jeff

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