Interfacing Arduino with 7-segment display | 4 digit counter

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Interfacing Arduino with 7-segment display | 4-Digit counter example.
Circuit diagram and Arduino code at:

7-Segment display with 74HC595 shift register:

Interfacing PIC18F46K22 with 7-segment display | CCS C Projects:

Interfacing PIC16F887 with 7-segment display | mikroC Projects:
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This is so helpful! Do you happen to have a tutorial for just 2 multiplexed 7 segment leds?

tylerswenerton
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Is it possible to add another switch to count by 10 and another to count by 100as in points

rccanuck
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I cannot get the button to increment the counter. Everything else seems to be working fine, though I've modified the circuit slightly for my common cathode display. Using NPN instead of PNP and tying to ground instead of 5V.

Sturdij
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