Published July 27, 2024

Distance-Based Alarm System:Alert When Objects Are Too Close

Alerts when objects come too close using an HC-SR04 sensor and buzzer. Simple, customizable safety solution! 🚨🔧

BeginnerFull instructions provided1 hour205

Distance-Based Alarm System:Alert When Objects Are Too Close

Things used in this project

Hardware components

Arduino UNO

Ultrasonic Sensor - HC-SR04 (Generic)

Buzzer

Breadboard (generic)

Jumper wires (generic)

Resistor 220 ohm

Story

Have you ever wondered how to create a simple yet effective safety alert system for your home or workspace? Meet our Distance-Based Alarm System—a project born from a desire to enhance everyday safety with smart technology.

Inspired by the potential of ultrasonic sensors and the creativity of DIY electronics, this project uses the HC-SR04 sensor and a buzzer to provide a real-time alert when objects get too close. Whether designing a collision detection system for a robot, setting up a proximity alert in a workshop, or experimenting with new tech, this system is both practical and versatile.

The process is straightforward: the ultrasonic sensor measures the distance to an object, and if it falls below a predefined threshold, the buzzer sounds an alarm. It’s an accessible project for beginners and a valuable tool for more experienced makers looking to add a safety feature to their creations.

From concept to completion, this project demonstrates the power of combining basic components with Arduino programming to create something functional and innovative. Share in the satisfaction of building a system that not only showcases your skills but also adds an extra layer of safety to your environment. Dive into the world of electronics and make your space smarter with this Distance-Based Alarm System!

Schematics

Code

Buzzer Alarm System

Buzzer Alarm System

Arduino

🚀 Just completed this Distance-Based Alarm System project and it’s working perfectly! The HC-SR04 sensor and buzzer are a great combo for creating an effective proximity alert. If you’re looking to add a bit of safety or just want to explore how ultrasonic sensors work, this is a fantastic starting point. Looking forward to seeing how others use this concept in their projects! Feel free to ask any questions or share your own variations. 😊🔧 #Arduino #DIY #Electronics

const int trigger = 9;
const int echo = 10;
const int buzzer = 11;
const int dist = 15; // 15 cm
void setup() {
 pinMode(trigger, OUTPUT);
 pinMode(echo, INPUT);
 pinMode(buzzer, OUTPUT);
 Serial.begin(9600);
}

void loop() {
  digitalWrite(trigger, LOW);
  delayMicroseconds(2);

  digitalWrite(trigger, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigger, LOW);

  long duration = pulseIn(echo, HIGH);
  float distance = (duration/2.0)*0.0344;
  
  if(distance<dist)
  {
    digitalWrite(buzzer, HIGH);
  }
  else{
    digitalWrite(buzzer, LOW);
  }

  delay(500);
}

Distance-Based Alarm System:Alert When Objects Are Too Close

Things used in this project

Hardware components

Story

Custom parts and enclosures

Buzzer alarm system working model

Schematics

Buzzer alarm system wiring

Code

Buzzer Alarm System

Credits

Vidhi Padhiar

Comments

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Distance-Based Alarm System:Alert When Objects Are Too Close

Distance-Based Alarm System:Alert When Objects Are Too Close

Things used in this project

Hardware components

Story

Custom parts and enclosures

Buzzer alarm system working model

Schematics

Buzzer alarm system wiring

Code

Buzzer Alarm System

Credits

Vidhi Padhiar

Comments

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