• Bluetooth Smartphone Controlled Socket

    Ever wanted to control your lighting, or any other appliance, from your phone?

    I built a bluetooth operated socket to switch a desk light on and off remotely. I used a arduino compatible microcontroller based on the arduino nano, HC-06 bluetooth module to connect to a phone and a relay board to switch on and off the 230v supply.
    To power the microcontroller I used the 5v transformer from a phone charger.
    I used the app “ArduDroid By TechBitar” to send messages to the  microcontrollers Serial Port. By sending different commands you can turn on and off each relay separately or them both at once.
    A relay acts like an electronic switch. It has two outputs, normally closed and normally open. When it receives a control signal it  connects the input of the relay to the normally closed output. Otherwise the input signal is sent top the normally open output.





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    The Relay Board, Mircocontroller and Bluetooth module.





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    Once the circuit had been assembled and tested I fitted it into a 2 gang pattress box. I connected one of the relay's outputs to a one gang socket.