Simple voltmeter using ADC

Solving Approach:

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Code

/*Paste your code here*/
// Pin for analog input
const int analogPin = A0;

void setup() {
  Serial.begin(9600);
}

void loop() {
  // Read the raw ADC value (10-bit resolution: 0 to 1023)
  int adcValue = analogRead(analogPin);
  
  // Convert the ADC value to voltage
  // 5V reference, voltage = (adcValue * 5.0) / 1023
  float voltage = adcValue * (5.0 / 1023.0);

  // Print the ADC value and corresponding voltage
  Serial.print("ADC Value: ");
  Serial.print(adcValue);
  Serial.print(" | Voltage: ");
  Serial.print(voltage);
  Serial.println(" V");
  
  // Wait for a short time before taking another reading
  delay(500);  // 500ms delay
}



 

Output

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