Hi All, I have built, coded and tested an Arduino with DHT11 Temp & humidity Sensor and Relay This will switch on the relay when Temp goes below 17 and turn off when Temp is above 22 I am happy with my build and ready to implement. I only have one question - Powering the Arduino with Mains AC (I…

Arduino Temp Controlled Heater - Connecting to Main AC 220v

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