SVA-CS2-24

RGB Led Instructions

A RGB led can be used to produce any color.

There are 4 pins. Three pins for each color channel and one pin to connect to ground.

Getting the Library

There is a adafruit library that makes it easier to control and RGB led. Download bundle and unzip.

Find the file adafruit_rgbled.mpy and copy it to the lib folder on the pico. This will restart the pico.

Circuit

• Pins 5, 6, and 7 each get connected to a 470 ohm resistor.
• Resistors connect to the shorter legs on the LED.
  • Pin 5 to Red leg
  • Pin 6 to Green leg
  • Pin 7 to Blue Leg
• Long leg (cathode) gets connected to ground

Code

Copy this code to Mu Editor.

import board
import adafruit_rgbled

# Pin the Red LED is connected to
RED_LED = board.GP5

# Pin the Green LED is connected to
GREEN_LED = board.GP6

# Pin the Blue LED is connected to
BLUE_LED = board.GP7

# Create a RGB LED object
led = adafruit_rgbled.RGBLED(RED_LED, BLUE_LED, GREEN_LED)

while True:
    led.color = (107, 235, 52) #greenish blue

Ideas

• You could cycle through colors by using a variable to control each color channel.
• Combine with other circuits like the potentiometer or button.