44 lines
1.3 KiB
Python
44 lines
1.3 KiB
Python
import time
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import board
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import adafruit_hcsr04
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from adafruit_circuitplayground.express import cpx
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# This line creates the distance sensor as an object.
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sonar = adafruit_hcsr04.HCSR04(trigger_pin=board.D9, echo_pin=board.D6, timeout=0.1)
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pixels = cpx.pixels
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pitchMultiplier = 300 # Change this value to modify the pitch of the theremin.
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def wheel(pos):
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# Input a value 0 to 255 to get a color value.
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# The colours are a transition r - g - b - back to r.
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if pos < 0 or pos > 255:
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return (0, 0, 0)
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if pos < 85:
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return (255 - pos * 3, pos * 3, 0)
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if pos < 170:
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pos -= 85
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return (0, 255 - pos * 3, pos * 3)
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pos -= 170
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return (pos * 3, 0, 255 - pos * 3)
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while True:
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try:
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handDistance = int(sonar.distance)
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print("Distance:", handDistance)
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except RuntimeError:
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print("retrying!")
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time.sleep(.00001)
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pitch = handDistance*pitchMultiplier
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# Limits on the distances that trigger sound/light to between 3 and 25 cm.
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if (handDistance >= 3) & (handDistance < 25):
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cpx.play_tone(pitch, 0.1)
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pixels.fill(wheel(handDistance*10))
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pixels.show()
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time.sleep(.00001)
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print(pitch)
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else:
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cpx.stop_tone()
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pixels.fill((0, 0, 0))
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pixels.show()
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