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need help w/7-segment displays


rynot

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I have a 2 digit timer using common cathode 7segment displays. Because Im enlarging the displays to 3 inch I need to change them to common anode. and I want to add 2 more diplays to the circuit making it a 4 digit timer. I want to do this without changing the program on the pic. Any ideas on how to do this?

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