The easiest, cheapest and fastest way in which we could implement a touchpad was to use simple metal strips horizontally and vertically. When the user touches, the two strips come in contact and this is detected by a micro controller. This data is then sent to the computer.
The aluminium strips.
Tape used as insulation.
Visualization on the computer.
Materials: Aluminum foil, plastic sheets and tape.
Software: Processing and Arduino IDE.
Hardware: Arduino USB Board.
Code on Github: https://github.com/paramaggarwal/touchpad
Made by Mukul Bharti and Param Aggarwal.
Originally published at paramaggarwal.com.