2022-10-05 15:00:59 +01:00
|
|
|
import plasma
|
2022-10-18 13:13:57 +01:00
|
|
|
from plasma import plasma_stick
|
2022-10-05 15:00:59 +01:00
|
|
|
import time
|
|
|
|
|
|
|
|
|
|
"""
|
|
|
|
|
This super simple example sets up two alternating colours, great for festive lights!
|
|
|
|
|
"""
|
|
|
|
|
|
|
|
|
|
# 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 = 40
|
|
|
|
|
HUE_2 = 285
|
|
|
|
|
|
|
|
|
|
# Set up brightness (between 0 and 1)
|
|
|
|
|
BRIGHTNESS = 0.5
|
|
|
|
|
|
|
|
|
|
# Set up speed (wait time between colour changes, in seconds)
|
|
|
|
|
SPEED = 1
|
|
|
|
|
|
|
|
|
|
# WS2812 / NeoPixel™ LEDs
|
2022-10-19 16:31:36 +01:00
|
|
|
led_strip = plasma.WS2812(NUM_LEDS, 0, 0, plasma_stick.DAT, color_order=plasma.COLOR_ORDER_RGB)
|
2022-10-05 15:00:59 +01:00
|
|
|
|
|
|
|
|
# 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)
|
