Hi

Im new to PIC and electronics in general, having come from a software 
background. Im looking to design something which can sample 90 wires for 
the presence or absence of a DC voltage (50v, but can be taken down to 
say 5v with a voltage divider if needed). It then needs to store a bit 
in memory for each wire indicating if the wire was live or not and then 
interface to a computer over USB so the computer can read the bits.

Having done some research it seems to me that a PIC based system is 
probably the best way to go, but I was wondering whats the best way to 
interface the 90 wires to the PIC? All the example projects I can find 
so far interface to a much smaller number of wires.

Thanks
Andrew
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