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This project is based on ttp223 capacitive touch sensors. When we touch that sensor it gives the output as high. we can use that output as an input to Arduino or an esp8266-based NodeMCU. Then Arduino controls the relay accordingly.
Relay act as a switch between AC wires. IoT Projects
Code and Schematics - https://www.hackster.io/robocircuits/...
IoT Board from RhydoLabz - https://www.rhydolabz.com/iot-boards-...