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This is what the circuit looks like I used "D Circuits" by Autodesk. Connect the middle pin of you potentiometers to the analog pins A0, A1 and A2 of your Arduino, this will send a different voltage to the pins of the Arduino depending of the position of the potentiometer. Check the specs of your potentionmeters to know which pin is which. Connect the voltage and grounds to the potentiometers.
OK, we are ready to move forward and learn new circuit skills and new programming skills. This will introduce us to a new circuit component, and will require us to learn some new programming skills. It has 4 leads. One lead, the long lead, is the common ground. You can control the color you get out of the LED based on the voltages you write to the different control pins. A schematic will probably help you understand how the component works and how you should hook up to it.
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Posted by michael on Jan 15, in Raspberry PiTutorials 34 comments. The next step is to configure the servoblaster kernel driver. To setup the servo blaster on the Raspberry Pi, we will need to have git installed to pull down the sources. In either case, the module will not yet be loaded so go ahead and install it using modprobe:. Now that all the prerequisites have been installed and the servo blaster device configured, on to the actual sample code. The python sample script uses PWM to fade from blue to violet, to red, to yellow, to green, to teal, back to blue.