Small PWM module?

0
votes

I'm trying to find a fitting module/component for a project, but have a hard time finding the right thing.

I need a PWM module/component that can provide a PWM signal and can be controlled via Arduino, preferably TX/RX. I've used this previously: https://protosupplies.com/product/xy-lpwm-pwm-signal-generator-module/

It works great, but is bulky due to the screen and buttons which I don't really need. Would be perfect to find the same module but without the screen and buttons.

What it needs to do:

  • Duty cycle 0-100%
  • Frequency 1-10kHz
  • 5V preferably
  • Communication via tx/rx or other arduino compatible
  • 1-2 channels
  • Small as possible

I've seen some Adafruit modules but they have at least 16 channels which is not necessary. Would also work, but if I can find an even smaller alternative that would be great.

Any suggestions?

(And no, the Arduino's PWM signals do not work in my case)

1
arduinopwm
IMO, your question should be asked at electronics.stackexchange.com – xuanduc611
Oh, good idea. Thank you! – Jan-Erik Runge
seeking recommendations for things like this is off-topic. please read How to Ask – Piglet
You could create your own PWM signals. – Rojo
I will not post as anwser but as commet to question. You need PWM extender, like GPIO extender? Those chips are actually LED Drivers. electronics.stackexchange.com/questions/277848/… – Pararera

1 Answers

1
votes

The standard Arduino analogWrite() can't do what you want without trickery, but most Arduino hardware can, so there's no real need for a separate PWM IC or module; you just need to code the Arduino's MCU's timer peripheral to do what you want.

You can do that "by hand", but I would try first to see if an alternative library like TimerOne can get you the PWM you specify. For SAMD21-based Arduinos there is this library (that I wrote), among others.

If you insist on having a separate module for your PWM, just google around (modules exist, but recommendations are not done here), or simply use a second Arduino of your choice as a dedicated PWM generator.