Morning Wake-up Alarm With Sound And Light Robotic Kit

Function

Project Overview: In this experiment, we build a “Sunlight-Activated Alarm.” Instead of setting a fixed time, this alarm relies on environmental sensors. It demonstrates how street lights or automatic brightness systems work in the real world.

Key Features:

• Automatic Detection: Uses an LDR Sensor to distinguish between Day and Night.
• Smart Logic: The Arduino constantly reads light levels. If the light value crosses a specific threshold (Morning), it triggers the alarm.
• Output: A rhythmic Beep (Buzzer) and Blink (LED) pattern indicates morning has arrived
  What You Need for This Project

To build this Automatic Morning Wake-up Alarm With Sound And Light, we used the following parts from the Robots 2030 Basic Robotic Kits:

• Arduino Uno
• BreadBoard
• LDR (Light Sensor)
• Buzzer (For Sound)
• LED (Koi bhi rang)
• Resistor Blue (LED ke liye)
• Jumper Wires 

Wiring (Taarein Jorna)

1. BreadBoard:

• + Connect with GND
• – Connect with A0

2. LDR Sensor:

• LDR Leg 1: Breadboard +.
• LDR Leg 2: Breadboard –.

3. LED Connections:

• LED Long Leg (+): Arduino Pin 13
• LED Short Leg (-): Blue Resistor ki aik side ke sath jorien.
• Blue Resistor doosri side: Breadboard +

4. Buzzer Wiring

• Buzzer Long Leg (+): Arduino Pin 10.
  Buzzer Short Leg (-):  Breadboard +

Code

int ldrPin = A0;      // LDR Pin
int buzzerPin = 10;   // Buzzer Pin
int ledPin = 13;      // LED Pin

int lightValue = 0;
// Threshold ko adjust karein.
// Internal Pullup mein: KAM number = ROSHNI, ZYADA number = ANDHERA
int threshold = 300;  

void setup() {
  pinMode(buzzerPin, OUTPUT);
  pinMode(ledPin, OUTPUT);
 
  // YEH LINE BOHAT ZAROORI HAI (LDR ke liye internal resistor ON karti hai)
  pinMode(ldrPin, INPUT_PULLUP);
 
  Serial.begin(9600);
}

void loop() {
  lightValue = analogRead(ldrPin);
  Serial.print("Sensor Value: ");
  Serial.println(lightValue);

  // Agar Roshni hai (Value 300 se kam hai)
  if (lightValue < threshold) {
    Serial.println("Subah Ho Gayi! Alarm Baj Raha Hai");
   
    // Alarm ON
    digitalWrite(ledPin, HIGH);
    digitalWrite(buzzerPin, HIGH);
    delay(200);
   
    // Alarm OFF (Blink effect)
    digitalWrite(ledPin, LOW);
    digitalWrite(buzzerPin, LOW);
    delay(200);
  }
  else {
    // Andhera hai (Sab band)
    digitalWrite(ledPin, LOW);
    digitalWrite(buzzerPin, LOW);
  }
  delay(100);
}