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PWM is a form of signal modulation that allows digital output to approximate an analog signal. Use this for questions about using the PWM pins (marked with ~).
8
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How precise is the timing of pulseIn()?
I've been using the pulseIn() function for processing PWM-based binary data encoding. It works well for distinguishing pulses which are significantly different lengths, e.g. 500us vs. 1500us. …
22
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Why do some pins have a different PWM frequency?
According to the Arduino reference for analogWrite(), the PWM frequency on most pins is ~490 Hz. However, it's ~980 Hz for pins 5 and 6 on the Uno, and for pins 3 and 11 on the Leonardo. …