ESP32 PWM Max frequency output

[ESP_Minatel]

Can you check the output signal using a scope?

[JKL@122JKL]

I do not have the scope at the moment due to WFH.
I've checked voltage using a meter (average) value of 1.75V.
At this, I can hear a slow humming sound(turns on) from the Transducer but doesn't produce the vaporize effect.
I've changed the duty cycle value from the above code to 10, and even at higher voltage, still the same doesn't produce any.


ledcWrite(LEDC_CHANNEL_0, 10);

[JKL@122JKL]

Can I try with varying frequency to check whether at particular freq inside a for loop or so?

[JKL@122JKL]

Hi @ ESP_Minatel
From this board linked below, I removed an unknown uC PWM resistor to MOSFET and connected ESP32 PWM Output-113KHz 50% Duty cycle, even with that transducer turns on and no mist effect.
(https://robu.in/product/dc-5v-ultrasoni ... zing-chip/)