54 lines
1.2 KiB
Python
54 lines
1.2 KiB
Python
import time
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import board
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import pwmio
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RED_PIN = board.D5 # Red LED pin
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GREEN_PIN = board.D6 # Green LED pin
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BLUE_PIN = board.D3 # Blue LED pin
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FADE_SLEEP = 10 # Number of milliseconds to delay between changes.
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# Increase to slow down, decrease to speed up.
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# Define PWM outputs:
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red = pwmio.PWMOut(RED_PIN)
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green = pwmio.PWMOut(GREEN_PIN)
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blue = pwmio.PWMOut(BLUE_PIN)
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# Function to simplify setting duty cycle to percent value.
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def duty_cycle(percent):
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return int(percent / 100.0 * 65535.0)
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# Fade from nothing up to full red.
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for i in range(100):
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red.duty_cycle = duty_cycle(i)
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time.sleep(FADE_SLEEP)
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# Now fade from violet (red + blue) down to red.
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for i in range(100, -1, -1):
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blue.duty_cycle = duty_cycle(i)
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time.sleep(FADE_SLEEP)
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# Fade from red to yellow (red + green).
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for i in range(100):
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green.duty_cycle = duty_cycle(i)
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time.sleep(FADE_SLEEP)
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# Fade from yellow to green.
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for i in range(100, -1, -1):
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red.duty_cycle = duty_cycle(i)
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time.sleep(FADE_SLEEP)
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# Fade from green to teal (blue + green).
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for i in range(100):
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blue.duty_cycle = duty_cycle(i)
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time.sleep(FADE_SLEEP)
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# Fade from teal to blue.
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for i in range(100, -1, -1):
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green.duty_cycle = duty_cycle(i)
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time.sleep(FADE_SLEEP)
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