Photoresistor GL5528 LDR

Here's a step-by-step tutorial:

Step 1: Gather the materials you'll need:

• Arduino Uno board
• Photoresistor (GL5528)
• Breadboard
• Jumper wires
• Resistor 1K

Step 2: Understand the Photoresistor:

• A photoresistor is a type of resistor whose resistance changes with respect to the amount of light falling on it.
• The GL5528 photoresistor is a common type of photoresistor that has high resistance in the dark and low resistance in bright light.

Step 3: Connect the Photoresistor to the Breadboard:

• Insert the photoresistor into the breadboard so that its legs are in separate rows.
• Connect one leg of the photoresistor to the 5V pin on the Arduino Uno board using a jumper wire.
• Connect the other leg of the photoresistor to the A0 pin on the Arduino Uno board using a jumper wire.
• Connect a third jumper wire from the A0 pin to the ground (GND) pin on the Arduino Uno board to create a voltage divider circuit.

Step 4: Upload the Arduino Code:

• Open the Arduino IDE on your computer and create a new sketch.
• Copy and paste the following code into the sketch:

int photoResistorPin = A0;  // Pin connected to the photoresistor
int ledPin = 13;  // Pin connected to the built-in LED on the Arduino Uno

void setup() {
  Serial.begin(9600);  // Initialize serial communication
  pinMode(ledPin, OUTPUT);  // Set the LED pin as an output
}

void loop() {
  int lightValue = analogRead(photoResistorPin);  // Read the value from the photoresistor
  Serial.print("Light Value: ");
  Serial.println(lightValue);  // Print the light value to the serial monitor

  if (lightValue < 500) {  // If the light value is below 500 (you can adjust this threshold as needed)
    digitalWrite(ledPin, HIGH);  // Turn on the LED
  } else {
    digitalWrite(ledPin, LOW);  // Turn off the LED
  }

  delay(100);  // Delay for stability
}

• Verify and upload the code to your Arduino Uno board.

Step 5: Test the Photoresistor:

• Open the Serial Monitor in the Arduino IDE to see the readings from the photoresistor.
• Cover the photoresistor with your hand or shine a flashlight on it to see the readings change.
• The built-in LED on the Arduino Uno should also turn on and off based on the light intensity detected by the photoresistor.

That's it! You have successfully connected a photoresistor (GL5528) to an Arduino Uno and created a simple light sensor circuit. You can further customize the code and experiment with different thresholds to suit your specific needs. Have fun exploring the world of electronics with Arduino!