Cycle through a rainbow of colors using the on-board RGB LED (aka neopixel)
(optional) pycubed.py
Using the pycubed.py helper library:
'''
General rainbow routine for neopixel adapted from Adafruit Neopixel example.
Should work on all PyCubed boards with a "NEOPIXEL" pin defined in firmware.
M.Holliday
pycubed.org
'''
from pycubed import cubesat
import time
cubesat.neopixel.auto_write=False
cubesat.neopixel.brightness=1
def wheel(pos):
if pos < 0 or pos > 255:
return (0, 0, 0)
if pos < 85:
return (255 - pos * 3, pos * 3, 0)
if pos < 170:
pos -= 85
return (0, 255 - pos * 3, pos * 3)
pos -= 170
return (pos * 3, 0, 255 - pos * 3)
def rainbow_cycle(wait):
for j in range(255):
cubesat.RGB = wheel(j & 255)
cubesat.neopixel.show()
time.sleep(wait)
######################### MAIN LOOP ##############################
while True:
rainbow_cycle(0.1) # change value to adjust speed
Using only built-in libraries:
'''
General rainbow routine for neopixel adapted from Adafruit Neopixel example.
Should work on all boards with a "NEOPIXEL" pin defined in firmware.
M.Holliday
pycubed.org
'''
import time
import board
import neopixel
pixel = neopixel.NeoPixel(board.NEOPIXEL, 1, brightness=0.5, auto_write=False)
def wheel(pos):
if pos < 0 or pos > 255:
return (0, 0, 0)
if pos < 85:
return (255 - pos * 3, pos * 3, 0)
if pos < 170:
pos -= 85
return (0, 255 - pos * 3, pos * 3)
pos -= 170
return (pos * 3, 0, 255 - pos * 3)
def rainbow_cycle(wait):
for j in range(255):
pixel[0] = wheel(j & 255)
pixel.show()
time.sleep(wait)
######################### MAIN LOOP ##############################
while True:
rainbow_cycle(0.1) # change value to adjust speed