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Kopplingsschema och kodexempel

Så här kopplar du Justerbar Step-down Module 3-40VDC till 1.5-35VDC LM2596 till en Arduino UNO eller ESP32, med ett exempel­sketch som du kan ladda upp direkt.

LM2596 Step-Down Voltage Monitor

This project monitors the output voltage of the LM2596 adjustable step-down converter using analog pin A0. Power the module from the Arduino 5V/VIN pin and turn the onboard potentiometer to watch the measured voltage update in the Serial Monitor (ensure output voltage does not exceed 5V).

Kopplingsschema: Justerbar Step-down Module 3-40VDC till 1.5-35VDC LM2596 på en Arduino UNO
Kopplingsschema · Klicka för att förstora
Kopplingstabell: Justerbar Step-down Module 3-40VDC till 1.5-35VDC LM2596 på en Arduino UNO
Kopplingstabell · Klicka för att förstora
LM2596_Step_Down_Voltage_Monitor.ino · kompilerad och testad
/*
 * ==================================================================
 *  Generated by Codey.online  —  https://www.codey.online
 * ==================================================================
 *  Project   : LM2596 Step-Down Voltage Monitor
 *  Board     : Arduino UNO (arduino:avr:uno)
 *  Parts     : Adjustable Step-down Module 3-40VDC 1.5-35VDC LM2596
 *  Libraries : none (built-in)
 *
 *  Codey Online is an AI-powered browser IDE for Arduino and ESP32.
 *  Describe your project and Codey writes the code, draws the wiring
 *  diagram and uploads it to your board, straight from the browser.
 *  This code is free to use, modify and share, without warranty.
 * ==================================================================
 */

// LM2596 Buck Converter Voltage Monitor
// Reads the regulated output on analog pin A0.
// Note: Keep the output voltage at or below 5.0V to protect the analog pin.

const int sensePin = A0;

void setup() {
  Serial.begin(115200);
  while (!Serial) {
    ; // Wait for Serial Monitor
  }
  Serial.println(F("LM2596 Step-Down Voltage Monitor Initialized"));
  Serial.println(F("Adjust the trimmer potentiometer on the module."));
}

void loop() {
  int rawValue = analogRead(sensePin);
  float voltage = rawValue * (5.0 / 1023.0);

  Serial.print(F("ADC Value: "));
  Serial.print(rawValue);
  Serial.print(F(" | Output Voltage: "));
  Serial.print(voltage, 2);
  Serial.println(F(" V"));

  delay(500);
}

Wiring diagram and example code generated by Codey.online — https://www.codey.online

Powering ESP32 with LM2596 Buck Converter

This setup uses the LM2596 step-down module to regulate a 12V DC power source down to 5V to power the ESP32 via its VIN pin. Before connecting the output to the ESP32, use a multimeter and turn the onboard trimmer potentiometer until the output measures exactly 5.0V. The ESP32 blinks its onboard status LED and reports uptime over Serial to confirm stable operation.

Kopplingsschema: Justerbar Step-down Module 3-40VDC till 1.5-35VDC LM2596 på en ESP32 DevKit V1
Kopplingsschema · Klicka för att förstora
Kopplingstabell: Justerbar Step-down Module 3-40VDC till 1.5-35VDC LM2596 på en ESP32 DevKit V1
Kopplingstabell · Klicka för att förstora
Powering_ESP32_with_LM2596_Buck_Converte.ino · kompilerad och testad
/*
 * ==================================================================
 *  Generated by Codey.online  —  https://www.codey.online
 * ==================================================================
 *  Project   : Powering ESP32 with LM2596 Buck Converter
 *  Board     : ESP32 DEVKIT V1 (esp32:esp32:esp32doit-devkit-v1)
 *  Parts     : Adjustable Step-down Module 3-40VDC 1.5-35VDC LM2596
 *  Libraries : none (built-in)
 *
 *  Codey Online is an AI-powered browser IDE for Arduino and ESP32.
 *  Describe your project and Codey writes the code, draws the wiring
 *  diagram and uploads it to your board, straight from the browser.
 *  This code is free to use, modify and share, without warranty.
 * ==================================================================
 */

// Onboard LED on ESP32 DevKit V1 is on GPIO 2
const int LED_PIN = 2;

void setup() {
  Serial.begin(115200);
  pinMode(LED_PIN, OUTPUT);
  
  Serial.println("LM2596 Step-Down Module ESP32 Power Demo");
}

void loop() {
  digitalWrite(LED_PIN, HIGH);
  Serial.print("ESP32 running stably on buck converter power. Uptime: ");
  Serial.print(millis() / 1000);
  Serial.println(" s");
  delay(1000);

  digitalWrite(LED_PIN, LOW);
  delay(1000);
}

Wiring diagram and example code generated by Codey.online — https://www.codey.online

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