Security Based Alarm System With Arduino Mega 2560

Introduction

In this article, I will explain about security-based Alarm Systems with Arduino Mega 2560. It can be used to identify a person who crossed a line without permission. It can be used in many places like schools, homes, hospitals, colleges, industries, etc.

• Arduino Mega 2560.
• PIR Sensor
• GSM Module
• Buzzer
• LED

• GSM means a Global System For Mobile Communication. It is used to send and receive a message in critical areas.
• It can also act as a GSM modem.
• It can have a PIN configuration and MIC is also attached.
  
  Figure 1: GSM Board

• It is used to detect people moving around approximately 10m from the sensor.
• The actual range is between 5m to 12m.
• It is of high sensitivity and low noise.
  
  Figure 2: PIR Sensor

• Connect the RX pin of the GSM board to the 04 of Arduino Mega 2560.
• Connect the TX pin of the GSM board to the 03 of Arduino Mega 2560.
• Connect the 5V power supply to the Arduino Mega 2560.
• At last, connect the 12 DC voltage to the GSM board.

• In the PIR sensor, they have three pins.
• The first pin can be connected to dc voltage range as 5v.
• The second pin can be connected to the Arduino board 5 in the digital pin.

• The Anode(+) pin can be connected to the digital pin 7 to an Arduino board.
• The cathode(-) pin can be connected to the Gnd to an Arduino board.

• The red color wire can be connected to the digital pin 10 to the Arduino board.
• The black color wire can be connected to the Gnd to the Arduino board.
• We can connect both the wires in exchange.