Hi all. I'm making a macro keyboard by using a pro micro and a button matrix. My issue is that the keypad code I've been working with seems to only work when I have max 4 rows. A fifth row of buttons does not work as soon as I add that row and edit the code to how logically I would think it should …

You replied while I was editing my first post to add a bit more information. The diodes are not reversed, they are wired in series on your breadboard. This is how the keypad should be wired (schematic taken from https://www.gammon.com.au/forum/?id=14175 ). You will not need the resistors, the keypa…

[Solved] Keypad matrix with more than 4 columns issue

Projects Programming

carloszman43 November 7, 2021, 9:31am 7

Ah ok whoops sorry. Thanks for the example schematic!

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[Solved] Keypad matrix with more than 4 columns issue

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