![]() One major disadvantage is that any interrupts will affect the timing, which can cause considerable jitter unless you disable interrupts. In addition, you have full control the duty cycle and frequency. This technique has the advantage that it can use any digital output pin. e.g.ĭelayMicroseconds(100) // Approximately 10% duty cycle 1KHz You can "manually" implement PWM on any pin by repeatedly turning the pin on and off for the desired times. Probably 99% of the readers can stop here, and just use analogWrite, but there are other options that provide more flexibility. (Note that despite the function name, the output is a digital signal.) The analogWrite function provides a simple interface to the hardware PWM, but doesn't provide any control over frequency. The Arduino's programming language makes PWM easy to use simply call analogWrite(pin, dut圜ycle), where dut圜ycle is a value from 0 to 255, and pin is one of the PWM pins (3, 5, 6, 9, 10, or 11). ![]() Simple Pulse Width Modulation with analogWrite
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