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Topic: PaperTeclado (PaperKeyboard) (Read 3248 times) previous topic - next topic

PaperTeclado (PaperKeyboard)

PaperTeclado  (in Spanish, click British flag for Google translation)

You can create a keypad/keyboard using Inkjet printer, paper, tape, and some cables.

Strips made of ink are slightly conductive, as the length of the strip increases, the resistance increases, and as the width of the ink strip decreases, the resistance decreases.

Two ink strips can act as a voltage divider, and when pressing one against the other, the value of the voltage divider changes. Looking at this value you can determine which button was pressed.