Driving the Atomizer(Humidifier)

Projects Programming
1

Hi,
I'm trying to drive the 113KHz Atomizer with esp32
(https://robu.in/product/dc-5v-ultrasonic-humidifiers-power-circuit-board-with-atomizing-chip/) with esp32
But I do see that the atomizer tries to turn on and a beep sound but I don't see any mist effect from the transducer
The circuit is similar to this: https://www.electroschematics.com/wp-content/uploads/2019/06/7-Atomizer-Driver-Blueprint.png

Code:

#define LEDC_CHANNEL_0 0

// use 4 bit precission for LEDC timer
#define LEDC_TIMER_4_BIT 4

// use 113KHz Hz as a LEDC base frequency
#define LEDC_BASE_FREQ 113000
#define LED_PIN 5

void setup() {
// Setup timer and attach timer to a led pin
ledcSetup(LEDC_CHANNEL_0, LEDC_BASE_FREQ, LEDC_TIMER_4_BIT);
ledcAttachPin(LED_PIN, LEDC_CHANNEL_0);
ledcWrite(LEDC_CHANNEL_0, 7);
}

void loop() {

}

Can anyone suggest what's going wrong here?

2

Your topic has been moved to this forum section as this location is more relevant to the subject

Please Auto format your code in the IDE, select all of it, use Copy for forum in the IDE and paste it here so that it is in code tags to make it easier to read and copy for examination

The easier you make it to read and copy the code the more likely it is that you will get help

3

Your code uses undefined functions. How can it compile? I suspect that you have not shown everything.

The schematic does not show resistor values or a part number for the FET. Where do any beeps come from?

4

Are you not going to use the driver board that comes with it?!?

5

The code is:

#define LEDC_CHANNEL_0     0

// use 4 bit precission for LEDC timer
#define LEDC_TIMER_4_BIT  4

// use 113KHz Hz as a LEDC base frequency
#define LEDC_BASE_FREQ     113000
#define LED_PIN            5

void setup() {
  // Setup timer and attach timer to a led pin
  ledcSetup(LEDC_CHANNEL_0, LEDC_BASE_FREQ, LEDC_TIMER_4_BIT);
  ledcAttachPin(LED_PIN, LEDC_CHANNEL_0);
  ledcWrite(LEDC_CHANNEL_0, 7);
}

void loop() {

}

The Mosfet-IRZ44n and Resistor to the Gate is 10 Ohm and Inductor value-220uH, Capacitor-100nF.

Beep is from Transducer

6

Yes, I've used and it works.
I want to drive it with ESP32 PWM.
Tried directly connecting esp32 PWM out to driver board Mosfet gate pin, still doesn't seem to produce mist effect.

7

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