So I am new to the arduino scene and have good knowledge of physics but limited knowledge of micro-electronics. I have been coding for years however Basically what I'd like to do is have a 4x5 matrix of buttons that works using 4 output pins and 5 input pins (that looks similar to the attached imag…

Controlling a Button Matrix

Grumpy_Mike May 1, 2018, 10:12am 3

Note you can only read a single button being pressed. Any more and you get phantom presses detected.

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