Write a program to interface Light Dependent Resistor (LDR) and display the values read on the Serial monitor after delay of 2 seconds each.
Last Updated : 16 Jul 2025
Solution:
const int ldrpin = A0; // LDR (Light Dependent Resistor) connected to analog pin A0
void setup(){
Serial.begin(9600); // Initialize serial communication at 9600 baud rate
}
void loop(){
int ldrvalue = analogRead(ldrpin); // Read the value from the LDR
Serial.println(ldrvalue); // Print the LDR value to the serial monitor
delay(2000); // Wait for 2 seconds before taking the next reading
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