The Circuit Playground is a simple single board computer with many built in Inputs and Outputs for us to explore. Before digging too deep however, let's start with the basics.
When a computer only needs to communicate simple information, often a blinky light is the quickest and easiest way to do so. LEDs, or Light Emitting Diodes, are small, low power, and easy to use devices for communicating with light. Take a look at the Circuit Playground image to right.
ledblocks. It also can be used to help debug your board - every time you plug the board in, you should see this LED blink for a few seconds. Notice that printed next to the red LED is the number 13, this is the Pin on the board that this LED is connected to - we'll learn more about Pins later.
Plug your board into your computer using a USB cable, and notice how these two LEDs respond. How else might you use a single light to communicate useful information to a user?
Found a bug in the documentation? Let us know at firstname.lastname@example.org