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Raspberry Pi Cookbook for Python Programmers by Tim Cox

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Controlling an LED

The hardware equivalent of hello world is an LED flash, which is a great test to ensure that everything is working and that you have wired it correctly. To make it a little more interesting, I've suggested using an RGB LED (it has red, green, and blue LEDs combined into a single unit), but feel free to use separate LEDs if that is all you have available.

Getting ready

You will need the following equipment:

  • 4x DuPont female to male patch wires
  • Mini breadboard (170 tie points) or a larger one
  • RGB LED (common cathode) / 3 standard LEDs (ideally red/green/blue)
  • Breadboarding wire (solid core)
  • 3x 470 ohm resistors

Each of the previous components should only cost a few dollars and can be reused for other projects afterwards. The breadboard ...

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