PWM module for Arduino

Using Arduino Project Guidance
#1

Hello,

I'm trying to create a Arduino Nano based PWM generator. However, since the pins from the Arduino only can produce PWM signals up to approx. 1kHz (and I need mauybe 2-3kHz) my plan is to use additional components to create the PWM signal.

My idea is to find a single component that can be operated through Arduino and can generate an adjustable PWM signal. But I'm really having a hard time finding this type of module. For example:

AD9833 Module

This one can produce the wanted waveforms but has no duty cycle adjustment.

1Hz-150Khz 3.3V-30V Signalgenerator

This one seems to be able to do everything I need but is not digitally adjustable through Arduino input.

Does anyone have suggestions on what module to use? Thanks!

#2

PCA9685

#3

Thanks for the fast answer! Think that the PCA9685 is exactly what I need.

Will maybe try to find a smaller one with less channels since I only need one.

#4

If you only need few channels, use a free timer on the Arduino, see e.g. TimerOne library. Only timer 0 should not be touched, because the timing functions depend on its frequency.

#5

With some register tweaks you can easily increase the PWM frequency from the default 490 or 980 Hz (depending on the PWM output pin) - but the vast majority of applications doesn't need this.

#6