Note that PWM control in MicroPython is somewhat in flux and varies greatly depending on the board. Using PWM you can control the brightness of a LED so that it pulses and glows in interesting ways instead of just blinking fully on and off. Instead the eye will see a brighter light the longer the PWM signal is turned on vs. If a PWM signal is fast enough (changing more than about 60 times a second) the human eye won't be able to see the LED turning on and off quickly. One great example of using PWM is to dim a LED between full and no brightness. off, or the duty cycle, allows you to smoothly control the output values. Controlling how long the signal is on vs. If the output is turned on for slightly longer then it's turned off it will appear to be a higher value. So quickly that the component connected to it can't tell the output signal is changing, instead it just sees the 'average' of how long the signal is on vs. PWM works by turning a digital output on and off very quickly. one that is only on or off) to simulate an analog or varying voltage output. Pulse-width modulation (PWM) is a way to use a digital output (i.e.
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