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Get Altium (One Month Free) - https://www.altium.com/yt/RoboCircuits
Previous Video - https://youtu.be/9F_2iM1VDcg
This project is based upon 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.
Code and Schematics - https://www.hackster.io/robocircuits/touch-switches-for-home-a2292f
IoT Board from RhydoLabz - https://www.rhydolabz.com/iot-boards-kits-c-209/iot-wifi-board-with-smps-relay-2-op-2-ip-p-2729.html?zenid=800fumisrcfs1iti23tecb8va6