import time from machine import ADC, Pin from neopixel import NeoPixel adc0 = ADC(Pin(10)) np = NeoPixel(Pin(15), 10) np.fill((0,0,0)) np.write() class IIRLowPassShift: def __init__(self, shift: int, initial: int=0): self.shift = shift self.y = initial def update(self): x = adc0.read_u16() self.y = self.y + ((x - self.y) >> self.shift) return self.y low_pass = IIRLowPassShift(2) while True: value = low_pass.update() / 65536 * 10 -1 value, fraction = divmod(value, 1) for i in range(10): if value >= i: np[i] = (255, 0, 0) elif fraction: np[i] = (int(fraction * 255), 0, 0) fraction = 0 else: np[i] = (0, 0, 0) np.write() time.sleep_ms(50)
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