Goal:

Creating touchpad that takes light information as data to determine touch area and draw / move / select on an LCD screen. May potentially be used to move mouse cursor on computer.

Sensor:

Phototransistor 5mm

Microcontroller:

Arduino Nano 33 IoT -> (0-1023 analog reading)

- Reading issues with ESP32 S3 as number floats around 4095

Multiplexer:

74HC4501