Pwm frequency

[Alan_37]

Hi ,

I am trying to build a high power LED dimmer using the ESP PWM but i have a problem PWM frequency is only 1khz this produces a buzzing sound since 1khz is audible tryed to add inductors but the problem still persists

Is there a way to increase the PWM frequency ?

[toffel969]

Hi ,

I am trying to build a high power LED dimmer using the ESP PWM but i have a problem PWM frequency is only 1khz this produces a buzzing sound since 1khz is audible tryed to add inductors but the problem still persists

Is there a way to increase the PWM frequency ?

You will have to change it in the source code, but someone already made a pull request on git hub. So either wait or compile your own bin
https://github.com/letscontrolit/ESPEasy/issues/575

[Alan_37]

Thanks for your help toffel969

[ahlermi]

Hello,

I have a Problem with hard coded frequency because of noices that a PWM controled fan does if you don't bring it into an area where you cant hear it.

In arduino you do it like

Code: Select all

void setup() {

TCCR1B = TCCR1B & 0b11111000 | 0x01; // Setzt Timer1 (Pin 9 und 10) auf 31300Hz
}

what have i to do in easyESP coding?

Best reguards

Michael

[toffel969]

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