Room Automation With Adruino

So I would like to control my room with my Arduino Uno. The only problem is that I cant find a way to control the lights in my room without putting in something like a servo to move the switch. I was looking into using a relay but I didn't understand how to do it. Any help please? Thank You :)

Hi Cz,

To understand more about relays and controlling power with Arduino, see the Arduino Power page on the http://ArduinoInfo.Info WIKI:

Also see the whole “Hardware Thing” here:

Thank you Terryking, i will look into that