Detect Light Flickering with Photodiode

Introduction

This experiment demonstrates how to use a photodiode to detect flickering light and send alerts when the flicker is detected.

Components Needed

• Photodiode
• Arduino
• Resistors
• Jumper Wires

Circuit Setup

1. Connect the photodiode to an analog input pin on the Arduino through a resistor to form a simple light detection circuit.

Code for Light Flickering Detection

Upload the following code to your Arduino to detect light flickering:

const int photodiodePin = A0;
int lightLevel;
int threshold = 500;

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

void loop() {
  lightLevel = analogRead(photodiodePin);
  if (lightLevel > threshold) {
    Serial.println("Flickering Detected!");
  } else {
    Serial.println("Normal Light");
  }
  delay(500);
}
            

Explanation

The photodiode detects changes in light intensity. When a flicker is detected, the Arduino alerts the user via the Serial Monitor.

Troubleshooting

• If no flicker is detected, check the wiring of the photodiode.
• If the flicker is not detected accurately, adjust the threshold value in the code.