Tuesday, November 10, 2015

Multiplexing Capacitive Sensors and TouchRead with Teensy

Multiplexing multiple capacitive sensors via a 4067 multiplexer works surprisingly well with a Teensy 3.2 and the TouchRead function. Data is clean, there is little noise or crosstalk (see image below) and the multiplexing doesn't necessarily need to be slowed down in order to accommodate the switching of sensors.