I am really interested in doing a circuit with arduino with some relays.
It's a simple circuit, its the arduino with a relay, that turn on and turn off a light connected to ac (220v). But my problem is that it is possible to power the arduino with the same power that the lights.
I am trying to not having the arduino connected with a cable to another socket, to avoid using a big power transformer in a plug.
How do you think that I can do that?
Thanks for your time and sorry if I maked lot of mistakes on the spelling.