pimoroni-pico/micropython/examples/plasma2040/alternating-blinkies.py

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1.3 KiB
Python

# This super simple example sets up two alternating colours, great for festive lights!
import plasma
from plasma import plasma2040
import time
# Set how many LEDs you have
NUM_LEDS = 50
# Pick two hues from the colour wheel (from 0-360°, try https://www.cssscript.com/demo/hsv-hsl-color-wheel-picker-reinvented/ )
HUE_1 = 0
HUE_2 = 127
# Set up brightness (between 0 and 1)
BRIGHTNESS = 0.5
# Set up speed (wait time between colour changes, in seconds)
SPEED = 1
# Pick *one* LED type by uncommenting the relevant line below:
# APA102 / DotStar™ LEDs
# led_strip = plasma.APA102(NUM_LEDS, 0, 0, plasma2040.DAT, plasma2040.CLK)
# WS2812 / NeoPixel™ LEDs
led_strip = plasma.WS2812(NUM_LEDS, 0, 0, plasma2040.DAT)
# Start updating the LED strip
led_strip.start()
while True:
for i in range(NUM_LEDS):
# the if statements below use a modulo operation to identify the even and odd numbered LEDs
if (i % 2) == 0:
led_strip.set_hsv(i, HUE_1 / 360, 1.0, BRIGHTNESS)
else:
led_strip.set_hsv(i, HUE_2 / 360, 1.0, BRIGHTNESS)
time.sleep(SPEED)
for i in range(NUM_LEDS):
if (i % 2) == 0:
led_strip.set_hsv(i, HUE_2 / 360, 1.0, BRIGHTNESS)
else:
led_strip.set_hsv(i, HUE_1 / 360, 1.0, BRIGHTNESS)
time.sleep(SPEED)