using old vending machine touch pad to control LEDs

I am converting an old vending machine into a sitting box and wanted to light it up with leds. It has a 21 button touch key pad (for selecting what snacks you want)…3 columns and 7 rows. the controller has 12 pin connection coming from the top. Attached to that was a 12 pin with the wires connecting to a 8 pin and 4 pin connection.

i am a total newbie, but what would i need to do to program a device so when the buttons are fixed to change to a fixed LED color.

would this be feasible?

this is the controller i wanted to use.

OP image.


How to post images so we don't have to download them and everyone can see them.
How to post an image.
Another page on posting images.

Ohm out the keyboard matrix.
Use a keypad library to read the keypad.

Since we know not what a "fixed LED" is, can't comment on how to control it.

thanks for the suggestion.

a fixed LED color would be one that the user cannot change and is assigned to a button or button combination.

for example. pushing button 1 would turn the LED blue, button 2...RED...button 3 Yellow...and so on.

So it is a RGB LED connected to 3 output pins? Is it common anode or cathode?