Overview
Things
Story

Step 1
Step 2
Step 3
Step 4
Step 5
Support

Published August 4, 2017 © GPL3+

Making Capacitance Alarm with Arduino

This alarm will turn on a buzzer and the bulb when the capacitance sensor senses something. And show you how to make the sensor yourself!

IntermediateFull instructions provided30 minutes2,528

Things used in this project

Hardware components

Breadboard (generic)

Relay (generic)

Jumper wires (generic)

Arduino UNO

Software apps and online services

Arduino IDE

Story

Step 1:

First gather all the parts:

gather all the parts

Breadboard

Aluminium foil for sensor

Arduino Uno

Jumpers

Buzzer or speaker

Relay

1M resistor

Step 2:

Connect relay like shown below:

connect like shown

relay IN1 => arduino D8

relay 5v => arduino 5v

relay GND => arduino GND

relay COM => + bulb

relay NO => AC +

- bulb => AC -

Step 3:

Make capacitance sensor by taking a piece of aluminium and connect 2 wires and connect a resistor to its one end.

making and connecting foil sensor

Step 4:

Connecting the buzzer or speaker:

Step 5:

Upload the code. Respect, share the project with others:

Support

Vote For Me Please

https://www.instructables.com/id/How-to-Make-Remote-Controlled-Bulb-With-Arduino/

https://www.instructables.com/id/How-to-Make-a-Parabolic-Microphone-With-an-Old-TV-/

https://www.instructables.com/id/How-to-Make-Secret-Drawer-Alarm/

Code

Arduino code

#include <CapacitiveSensor.h>

// by M shameel kv


CapacitiveSensor   cs_4_2 = CapacitiveSensor(4,2);        // 1M resistor between pins 4 & 2
        

void setup()                    
{
   cs_4_2.set_CS_AutocaL_Millis(0xFFFFFFFF);     
   Serial.begin(19200);
   pinMode(11,OUTPUT);
   pinMode(8,OUTPUT);
   digitalWrite(8,HIGH);
   delay(100);
   
}

void loop()                    
{
    long start = millis();
    long total1 =  cs_4_2.capacitiveSensor(30);
    

 // for debugging
    Serial.print(millis() - start);       
    Serial.print("\t");                    

    Serial.println(total1);  
                    
    if ((total1)>=600) {
      tone(11,750);
      delay(1000);
      noTone(11);
      digitalWrite(8,LOW);
      
      
    }
   
    
    

    delay(10);                              
}

Credits

muhammed shameel k.v

0 projects • 11 followers

I am a great at electronics. I have programming knowledge and some projects of my own

Making Capacitance Alarm with Arduino