![]() The longer leg (known as the ‘anode’), is always connected to the positive supply of the circuit. When you pick up the LED, you will notice that one leg is longer than the other. Therefore, any wire you poke into the green holes will be connected to other wires poked into the other green holes. So, for example, all the green holes marked are connected together, but they are not connected to the yellow holes, nor the purple ones. In the middle, the columns of wires are connected together with a break in the middle. The same goes for the two rows of holes at the bottom of the breadboard. And so are the second row of holes – marked with blue dots. With the breadboard in the CamJam EduKit, the top row of holes are all connected together – marked with red dots. The holes on the breadboard are connected in a pattern. They are often used to test a circuit design before creating a Printed Circuit Board (PCB). The breadboard is a way of connecting electronic components to each other without having to solder them together. You can get all these, and more, in the £5 CamJam EduKit from The Pi Hut, which teaches you more about LEDs, buzzers and switches, and includes all the hardware and eight well-written worksheets about using the GPIO pins on your Raspberry Pi. In addition to your Raspberry Pi running Raspbian, what you will need is: In this tutorial I am going to show you how to light an LED. ![]() With a little programming, you can then control them or detect what they are doing. They are the little pins sticking out of the circuit board and allow you to plug various devices into your Raspberry Pi. One of the biggest selling points of the Raspberry Pi is its GPIO, or General Purpose Input/Output ports.
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