![]() ![]() The relay module and Bluetooth module can be, in turn, powered using a board power supply of Arduino Uno. Arduino Uno is powered with a 12V DC adaptor/power source. The number of channels depends on the number of appliances you wish to control. The home automation circuit is built around an Arduino Uno board, Bluetooth module HC-05 and a 3-channel relay board. So you need not get up to switch on or switch off the device while watching a movie or doing some work. Commands are sent via Bluetooth to Arduino Uno. Presented here is a home automation project using a simple Android app, which you can use to control electrical appliances with clicks or voice commands. ![]() So it makes sense to use these to control home appliances. Nowadays, people have smartphones with them all the time.
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