How to connect a matrix keyboard from Tetris?

Question

Arduino

I have just such a keyboard, I got it from a broken Tetris

And how can I connect it to an arduino uno?

Answer 1

First, draw a diagram to understand where the rows of the matrix are in the loop, and where are the columns. Get started.

Answer 2

After drawing the circuit - you can use "AVR243: Matrix Keyboard Decoder on tinyAVR and megaAVR devices":
https://www.microchip.com/wwwAppNotes/AppNotes.asp...