This is my second video. A tutorial on how to use a matrix keypad with just one pin of an Arduino. One reason why I started my Youtube channel with the keypad review video was that I knew that I could make this video afterwards. This was one of the projects that I tinkered with when learning about the Arduino soft- and hardware last year.
You can download the sketch and the library here: AnalogMatrixKeypad
Buy the keypad here: Ebay Matrix Keypad
the sketch:
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