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Author Topic: Keyboard from old cash register.  (Read 1334 times)
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I got a cash register machine from 1985, i've taken it apart to see what can a i use, and i would like to interface with the keyboard if possible. It have two layers with their corresponding bus, i think it should work like modern keyboards, one pin from one layer makes short with a pin from the other layer, but i haven't had any results yet.

¿Any advice or clue?

Photos, i've removed some keys experimenting.




Thx.
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Massachusetts, USA
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From the flex circuits it looks like a 4x8 matrix keypad.  The keypad library should help:

http://arduino.cc/playground/Code/Keypad
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Thanks, it headed me in the right direction.
Now i just need a way to hookup the flexible cables.
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Thanks, it headed me in the right direction.
Now i just need a way to hookup the flexible cables.

Can you remove the original connector from whatever board the keypad plugged into?

I find a propane torch to melt the solder and a sharp rap on a hard surface will nock most connectors off a board. smiley
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I managed to remove the original connectors with one like this.


Now i'm mapping the keys  smiley

Thx.
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