> I was wondering whats the best way to interface the 90 wires to
> the PIC?

You might consider a couple of 64-pin PICs. Some like the 16F1946
are cheap, have 50 I/O, and one could pass its results to the other. A
Vinculum serial-to-USB IC would simplify the comms to the PC

http://ww1.microchip.com/downloads/en/DeviceDoc/41414A.pdf

www.vinculum.com/


Joe
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