https://github.com/matesoft2033/signal-detection-lcd

An Arduino project using Adafruit LCD to display system status based on signal input.
https://github.com/matesoft2033/signal-detection-lcd

arduino-programming embedded-systems lcd-display pir-sensor ultrasonic-sensor

Last synced: 4 months ago
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An Arduino project using Adafruit LCD to display system status based on signal input.

• Host: GitHub
• URL: https://github.com/matesoft2033/signal-detection-lcd
• Owner: matesoft2033
• Created: 2025-02-08T19:28:53.000Z (5 months ago)
• Default Branch: main
• Last Pushed: 2025-02-08T19:59:13.000Z (5 months ago)
• Last Synced: 2025-02-08T20:28:20.370Z (5 months ago)
• Topics: arduino-programming, embedded-systems, lcd-display, pir-sensor, ultrasonic-sensor
• Language: C++
• Homepage: https://www.tinkercad.com/things/3joX91VP9AS-lcd-ipr-and-piezo?sharecode=lEEG7kYPQ0_kl7-CPF_PBfpeMoTCeVGT43g9hkbGiik
• Size: 0 Bytes
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# 🚨 LCD Security Alert System  

An Arduino-powered **security alert system** that uses an **Adafruit LCD display** to show status messages based on a detected signal. It includes **LED alerts** to indicate warnings.

## 📸 Circuit Diagram  

Here’s the circuit setup for this project:  

![Circuit Diagram](circuit_img.png)

## 🔧 Features  

✅ **Real-time status display** using `Adafruit_LiquidCrystal`  

✅ **Signal detection** using a digital sensor  

✅ **Alert system** with LED blinking  

✅ **Automatic LCD updates**  

## 🛠 Components Used  

- **Arduino Board** (Uno/Nano)  

- **Adafruit LCD Display**  

- **LED** (for alert system)  

- **Resistors & jumper wires**  

- **PIR sensor**  

## 🚀 How It Works  

1. **Connect the Circuit**: Follow the diagram above.  

2. **Upload the Code**: Load `lcd_alert.ino` to your Arduino.  

3. **Power On**:  

   - If a signal is detected, the LCD displays **"Unidentified"**, and the LED blinks.  

   - If no signal is detected, the LCD displays **"All Fine"**, and the LED turns off.  

## 📜 Code  

```cpp

#include 

Adafruit_LiquidCrystal lcd(0);

int signal;

void setup() {

  pinMode(2, OUTPUT);

  pinMode(3, INPUT);

  pinMode(4, OUTPUT);

  pinMode(6, OUTPUT);

  lcd.begin(16,2);

}

void loop() {

  signal = digitalRead(3);

  if (signal == 1) {

    digitalWrite(6, LOW);

    digitalWrite(2, HIGH);

    lcd.setCursor(2,0);

    lcd.print("Unidentified");

    for (int i = 0; i < 10; i++) {

      digitalWrite(4, HIGH);

      delay(100);

      digitalWrite(4, LOW);

      delay(100);

    }

  } else {

    digitalWrite(2, LOW);

    digitalWrite(4, LOW);

    digitalWrite(6, HIGH);

    lcd.clear();

    lcd.setCursor(2,0);

    lcd.print("All Fine");

  }

}