In this example we will display the red, green and blue colours on an RGB LED
I used a breakout which came as part of a kit, it was a common anode type
rgb breakout
Here is a schematic that shows how to connect this to your Raspberry Pi B
Pi and RGB Led schematic
Code
Written in python and requires the RPi.GPIO library to be installed
import time
import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
#Color blue : GPIO Pin 37
GPIO.setup(26,GPIO.OUT)
#Color green : GPIO Pin 35
GPIO.setup(19,GPIO.OUT)
#Color red : GPIO Pin 33
GPIO.setup(13,GPIO.OUT)
while True:
#all off
GPIO.output(13,GPIO.HIGH)
GPIO.output(19,GPIO.HIGH)
GPIO.output(26,GPIO.HIGH)
#RED ON
GPIO.output(13,GPIO.LOW)
time.sleep(1)
#RED OFF
GPIO.output(13,GPIO.HIGH)
time.sleep(0.1)
#GREEN ON
GPIO.output(19,GPIO.LOW)
time.sleep(1)
#GREEN OFF
GPIO.output(19,GPIO.HIGH)
time.sleep(0.1)
#BLUE ON
GPIO.output(26,GPIO.LOW)
time.sleep(1)
#BLUE OFF
GPIO.output(26,GPIO.HIGH)
time.sleep(0.1)Save as rgb.py and run with the following sudo python rgb.py
