Datasheet

and when it will turn of. Channel indicates which of the 16 PWM outputs should be updated

with the new values.

Arguments

channel: The channel that should be updated with the new values (0..15)

on: The tick (between 0..4095) when the signal should transition from low to high

off:the tick (between 0..4095) when the signal should transition from high to low

Example

The following example will cause channel 15 to start low, go high around 25% into the pulse

(tick 1024 out of 4096), transition back to low 75% into the pulse (tick 3072), and remain low

for the last 25% of the pulse:

If you need to calculate pulse-width in microseconds, you can do that by first figuring out

how long each cycle is. That would be 1/freq where freq is the PWM frequency you set

above. For 1000 Hz, that would be 1 millisecond. Then divide by 4096 to get the time per

tick, eg 1 millisecond / 4096 = ~0.25 microseconds. If you want a pulse that is 10

microseconds long, divide the time by time-per-tick (10us / 0.25 us = 40) then turn on at tick

0 and turn off at tick 40.

pwm.setPWM(15, 1024, 3072)

https://learn.adafruit.com/adafruit-16-channel-pwm-servo-hat-for-

raspberry-pi

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