An Arduino Pro mini handles the selection between outputs by driving a selection of relays with appropriate timing.

In this quick Arduino tutorial I will explain how you can control a relay using the Arduino Board, one 1K and one 10K resistors, 1 BC547 transistor, one 6V or 12V relay, one 1N4007 diode and a 12V fan ...

Hi, I'm Bill. I'm a software developer with a passion for making and electronics. I do a lot of things and here is where I document my learning in order to be able to inspire other people to make ...

– Arduino Learning Board After prototyping countless projects, I designed this board to make creating your first circuits and mini-projects as simple as possible, and to be my “go to” board ...

An Arduino Pro Mini takes care of switching the relays based on the button presses. On the input side, you can plug in devices like a phone, TV, digital audio player or a computer.