Hi, I just dissasembled a calculator and wanted to connect the keypad to my arduino. Honestly I have no clue how to do that. I think I know the idea behind matrix keypads, but the keypad works bit different.The only things I know:-The keypad is piece of paper-There is specially crafted rubber pad, that helps to make connection between paper and finger-The keypad is connected via 11 pin FFC/FPC-There are 25 keys on the keypad-I have no success with checking conductivity between each pin pair with pressed button Does anybody have any tips that would help connect the keypad with mine microcontroller?Images:Front:Back:
Is such a keyboard usable with an Arduino? Depends on the resistance you read with your ohmmeter when the pad is pressed down.