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== References == | == References == | ||
* Arduino. https://www.arduino.cc/en/Tutorial/PWM | * Arduino. https://www.arduino.cc/en/Tutorial/PWM | ||
* Collins, N. (2009) Handmade Electronic Music: The Art of Hardware Hacking. Routledge, 2 edition, pp. | * Collins, N. (2009). Handmade Electronic Music: The Art of Hardware Hacking. Routledge, 2 edition, pp. | ||
* interspecifics. http://interspecifics.cc/ | |||
* wikipedia A, https://en.wikipedia.org/wiki/Voltage-controlled_oscillator | * wikipedia A, https://en.wikipedia.org/wiki/Voltage-controlled_oscillator | ||
* wikipedia B, https://en.wikipedia.org/wiki/Schmitt_trigger | * wikipedia B, https://en.wikipedia.org/wiki/Schmitt_trigger |