Freenove Ultimate Starter Kit User Manual

115
Chapter 9 Potentiometer & RGBLED
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Chapter 9 Potentiometer & RGBLED
In this chapter, we will use 3 potentiometers to control the brightness of 3 LEDs of RGBLED to make it show
different colors.
Project 9.1 Colorful Light
In this project, 3 potentiometers are used to control RGBLED and the principle is the same with the front soft
light. Namely, read the voltage value of the potentiometer and then convert it to PWM used to control LED
brightness. Difference is that the front one need only one LED, but this project needs a RGBLED（3 LEDs）.
Component List
Raspberry Pi 3B x1
GPIO Expansion Board & Wire x1
BreadBoard x1
Jumper
Rotary potentiometer x3
PCF8591 x1
Resistor 10kΩ x2
Resistor 220Ω x3
RGBLED x1

Freenove Ultimate Starter Kit Specifications

General

Brand	Freenove
Model	Ultimate Starter Kit
Category	Single board computers
Language	English