Modular keypad matrix resistance calculation and wiring

Other Hardware General Electronics
1

Hi!
I would like to build a modular keypad buttons/leds preparing single units of 4x2 buttons that I would later assembly toghether according to what I'm working on. i.e. putting together 4 of them for an 8x8 custom launchpad or a 16x2 sequencer board.

I was thinking to listen buttons and controlling led with the "matrix logic" (cols and rows) but, considering that all the components are in serial I'm wondering if the resistance shall be all different according to their position in the grid. Or I'm wrong?
Maybe the first question is: "is it possible to make what I'm looking for?".Then,. What can I do?

Thank you
(I'm noob...)

2

several keys ? This is an example to add 12 of pushbuttond to one analog input.

12keys.jpg
12keys.jpg630×1362 238 KB

3

Hi kronikle!

If I understand you correctly you want to interface a certain amount of buttons with fewer inputs (no matter if they're going into a microcontroller or are handled differently)? You could go knut_ny's way and simply built yourself a small D/A converter. The mentioned methode of using a matrix to read different buttons should also work just fine. See the attached picture.