Capacitive Touch Sensor with Arduino — Maker Portal
Amazon.com: TOLAKO Digital Touch Sensor Capacitive Touch Switch Module for Arduino : Electronics
1Pc TTP223 Capacitive Touch Switch Digital Touch Sensor Module for Arduino Single Bond 2.0 V to 5.5 V Integrated Circuits: Amazon.com: Industrial & Scientific
Amazon.com: OLatus OL-METAL-TOUCH-SENSOR Metal touch sensor module KY-036 Human Body Touch sensor For Arduino, ARM and other MCU : Industrial & Scientific