Control Bulb Using Arduino And LDR in Proteus
Turn On Bulb Based On Darkness Level Measured or Detected By Light Dependent Resistor
You Can Do it Yourself
Use this Code Below But Remember That you Can Change Pins
// Pin Definitions
const int ldrAnalogPin = A1; // Connected to A0 of LDR Module
const int ldrDigitalPin = 2; // Connected to D0 of LDR Module
const int ledPin = 13; // The LED
void setup() {
pinMode(ledPin, OUTPUT);
pinMode(ldrDigitalPin, INPUT); // D0 provides a signal to the Arduino
Serial.begin(9600);
Serial.println("LDR Dual-Mode System Starting...");
}
void loop() {
// 1. Read Analog Value (0 to 1023)
int lightIntensity = analogRead(ldrAnalogPin);
// 2. Read Digital Value (0 or 1)
int isDark = digitalRead(ldrDigitalPin);
// Print data for debugging
Serial.print("Intensity: ");
Serial.print(lightIntensity);
Serial.print(" | Digital Status: ");
Serial.println(isDark);
// Logic: Use the Digital pin to toggle the LED
// NOTE: On most 4-pin modules, D0 goes LOW when light is detected
// and HIGH when it is DARK.
if (isDark == HIGH) {
digitalWrite(ledPin, HIGH); // Turn LED ON in the dark
} else {
digitalWrite(ledPin, LOW); // Turn LED OFF in the light
}
delay(200);
}