Charlieplexing is a technique of controlling many LEDs using a few I/O pins. Charlieplexing is same as multiplexing, but it uses the tri-state logic (high, low input) to reduce the number of pins ...
https://github.com/marcuserronius/ChuckPlex I couldn't get the original code to work- the pin numbers seemed to be corrupted (non-sensical at least) when writing ...
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