Capacitive touch sensor module for Arduino and other microcontroller projectsOne side has a 9mm x 9mm capacitive touch area, and a TTP223 touch sensor IC on the reverse. An LED indicates when the switch is touched. It can be set to either a high or low output, and momentary or latching output by joining or not joining the A and B connections:
A open = High output when touched
A Closed = Low output when touched
B open = Momentary switch action
B Closed = Latching switch action
Voltage : 3 to 5VDC
PCB Size 14x10mm
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