Common anode LED display solution
It is using the same schematics with a few exceptions:
- common anode switching transistors are of PNP type (best solution is to
take low power switching transistors),
- resistor from pin 3 of decoder 4051 should be grounded,
- source code should be slightly changed
(Changes are in the source code commented. You should uncomment them and comment
"cathode" blocks.)
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