I found a tutorial online for a 4X4 matrix. So I built it and all my LEDs are wired properly. Here is the link. http://minipenguin.com/?p=107 I think there may be an issue with the code. I think I have it wired correctly to the arduino. Anodes in rows and cathodes in columns. The diagram is starigh…

4X4 Matrix

nickgammon May 14, 2012, 10:29pm 9

Where are the resistors? Can you show them too please?

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