Circuit Documentation

Summary

The circuit consists of an Arduino UNO microcontroller interfaced with an IR sensor, a buzzer, and a red two-pin LED. The IR sensor is used to detect the presence of an object, and upon detection, the Arduino activates the buzzer and the LED to signal that an object has been detected. The circuit is powered by the 5V output from the Arduino, and a common ground is shared among all components.

Component List

Arduino UNO

• Description: A microcontroller board based on the ATmega328P.
• Pins Used:
  • 5V - Provides power to the IR sensor.
  • GND - Common ground for the circuit.
  • D2 - Receives the output signal from the IR sensor.
  • D3 - Controls the anode of the LED.
  • D4 - Controls the buzzer.

IR Sensor

• Description: A sensor that detects the presence of an object by using infrared light.
• Pins Used:
  • out - Sends the detection signal to the Arduino.
  • gnd - Connected to the common ground.
  • vcc - Powered by the 5V supply from the Arduino.

Buzzer

• Description: An electronic buzzer that emits sound when powered.
• Pins Used:
  • PIN - Controlled by the Arduino to emit sound.
  • GND - Connected to the common ground.

LED: Two Pin (red)

• Description: A red LED that lights up when powered.
• Pins Used:
  • anode - Controlled by the Arduino to turn the LED on and off.
  • cathode - Connected to the common ground.

Wiring Details

Arduino UNO

• 5V connected to IR sensor vcc.
• GND connected to IR sensor gnd, LED cathode, and buzzer GND.
• D2 connected to IR sensor out.
• D3 connected to LED anode.
• D4 connected to buzzer PIN.

IR Sensor

• vcc connected to Arduino UNO 5V.
• gnd connected to Arduino UNO GND.
• out connected to Arduino UNO D2.

Buzzer

• PIN connected to Arduino UNO D4.
• GND connected to Arduino UNO GND.

LED: Two Pin (red)

• anode connected to Arduino UNO D3.
• cathode connected to Arduino UNO GND.

Documented Code

// Code for Arduino UNO
int sensorPin = 2;    // IR sensor pin
int ledPin = 3;       // LED pin
int buzzerPin = 4;    // Buzzer pin

void setup() {
  pinMode(sensorPin, INPUT);    // Set IR sensor pin as input
  pinMode(ledPin, OUTPUT);      // Set LED pin as output
  pinMode(buzzerPin, OUTPUT);   // Set buzzer pin as output
}

void loop() {
  int objectDetected = digitalRead(sensorPin);  // Read the sensor value

  if (objectDetected == LOW) {  // Assuming LOW means object detected
    digitalWrite(ledPin, HIGH);  // Turn LED on
    digitalWrite(buzzerPin, HIGH);  // Turn Buzzer on
  } else {
    digitalWrite(ledPin, LOW);   // Turn LED off
    digitalWrite(buzzerPin, LOW);  // Turn Buzzer off
  }
}

The code is written for the Arduino UNO and is responsible for reading the output of the IR sensor. When the sensor detects an object (signaled by a LOW reading), the Arduino turns on the LED and the buzzer. When no object is detected, the LED and the buzzer are turned off. The setup() function initializes the pins, and the loop() function contains the main logic that is executed repeatedly.