23 lines
724 B
Python
23 lines
724 B
Python
# SPDX-FileCopyrightText: 2018 Kattni Rembor for Adafruit Industries
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#
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# SPDX-License-Identifier: MIT
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"""CircuitPython Essentials PWM with variable frequency piezo example"""
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import time
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import board
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import pwmio
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# For the M0 boards:
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piezo = pwmio.PWMOut(board.A2, duty_cycle=0, frequency=440, variable_frequency=True)
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# For the M4 boards:
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# piezo = pwmio.PWMOut(board.A1, duty_cycle=0, frequency=440, variable_frequency=True)
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while True:
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for f in (262, 294, 330, 349, 392, 440, 494, 523):
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piezo.frequency = f
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piezo.duty_cycle = 65535 // 2 # On 50%
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time.sleep(0.25) # On for 1/4 second
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piezo.duty_cycle = 0 # Off
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time.sleep(0.05) # Pause between notes
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time.sleep(0.5)
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