Arduino. Basically, it is an open source, open hardware microcontroller. They give you the software and the hardware plans online and you can build your own. Of course, you can always buy a premade kit (which is my preference).Recently, I’ve discovered that which is known as
So… what does this “microcontroller” do? Basically it controls simple input and output on a low level. You want to make something turn on and off a light? A microcontroller can do. Sure, you can do that with your computer too, but an Arduino Uno only costs $30 and takes very little power to run.