Potentiometer controlled Red-Green-Blue LED
[Light Challenge 4 Fritzing File](https://drive.google.com/open?id=0B13oE93nzkTCbDJxdUFtN0VsSGM)
One of our favorite components is a Potentiometer. It is like a dimmer switch or the volume knob in our car stereo. It is totally analog, a range of values. It can be used in many ways, but ultimately, it's a variable resistor, giving a range of power to a device. Let's try it first with the RGB LED.
1 Arduino
1 USB cable
1 Breadboard
1 RGB LED - short lead GREEN, medium lead BLUE, longest lead NEGATIVE, short lead RED
3 330 ohms resistors
7 jumper wires - one for GND, three for pins 9, 10, 11. 3 for the Potentiometer
1 Potentiometer
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