This smart alarm system offers a cost-effective and reliable solution for enhancing security in various settings, including homes, offices, and commercial establishments. Its utilization of the LM358 comparator, PIR sensor, and buzzer ensures efficient motion detection and timely notification, contributing to the overall safety and peace of mind of users.

Features of proposed system are:

• It is very cheap and affordable.
• It is efficient and portable that means we can place this circuit at any place easily.
• Very easy to use.
• Maintenance cost is low.

The project focuses on the following areas:

1. Characteristics of PIR sensor.
2. High voltage device controlling.
3. Buzzer working technique.

 The major building blocks of this project are:

1. Regulated power supply with voltage regulator.
2. LM358 Comparator
3. Passive Infra Red Sensor (PIR).
4. Buzzer

Regulated power supply:

Block diagram:

video:

RF Communication ranges in between 30 KHz to 300 GHz. RF communication works by creating electromagnetic waves at a source and being able to pick up those electromagnetic waves at a particular destination. These electromagnetic waves travel through the air at near the speed of light. The wavelength of an electromagnetic signal is inversely proportional to the frequency i.e., the higher the frequency, the shorter the wavelength.

In this project we use micro controller, which is programmed to control the input and output modules interfaced to it. The controller makes use of a PIR based input sensor to sense the human being and give us an alert indication.

The controlling device of the whole system is a Microcontroller to which RF receiver, PIR sensor and DC motors are interfaced. The remote control has control buttons interfaced to RF transmitter. Whenever a button is pressed, the data related to that button will be transmitted through RF transmitter. This data will be received by RF receiver and is fed to the Microcontroller. The Microcontroller processes this data and acts accordingly on Robot motors. PIR sensor is interfaced to the Microcontroller which continuously monitors human presence and intimates to the controller. The controller alerts through Buzzer if human presence is present. The Microcontroller is programmed using Embedded C language.

The main objectives of this project are:

1. Design of real time robot.
2. Wireless control of robot directions and movement.
3. Real time human detection.
4. Buzzer based alert, if human presence is detected.

The learning’s provided by the project are:

1. RF communication.
2. Interfacing RF receiver to Microcontroller.
3. Characteristics of PIR sensor.
4. Interfacing PIR with controller.
5. DC motor working and need for motor driver.
6. Embedded C programming.
7. PCB design concepts.

The major building blocks of this project are:

1. Regulated Power supply.
2. RF transmitter and RF receiver.
3. Microcontroller
4. Control buttons.
5. PIR Module.
6. Reset
7. DC Motors with driver.
8. Buzzer with driver.
9. Crystal
10. LED Indicators.

Software’s used:

1. PIC-C compiler for Embedded C programming.
2. PIC kit 2 programmer for dumping code into Micro controller.
3. Express SCH for Circuit design.

Block diagram:

video:

Wi-Fi (Short for Wireless Fidelity) is a wireless technology that uses radio frequency to transmit data through the air. Wi-Fi has initial speeds of 1mbps to 2mbps. Wi-Fi transmits data in the frequency band of 2.4 GHz. It implements the concept of frequency division multiplexing technology. Range of Wi-Fi technology is 40-300 feet.

In this project we use micro controller, which is programmed to control the input and output modules interfaced to it. The controller makes use of a PIR based input sensor to sense the human being and give us an alert indication through buzzer.

The controlling device of the whole system is a Microcontroller to which Wi-Fi module, PIR sensor, Buzzer and DC motors are interfaced. We can control the robot using smart phone through Wi-Fi. When the user press the button on smart phone this data is received the Wi-Fi module which is connected to the microcontroller. The Microcontroller processes this data and acts accordingly on Robot motors. PIR sensor is interfaced to the Microcontroller which continuously monitors human presence and intimates to the controller. The controller alerts through Buzzer if human presence is present. The Microcontroller is programmed using Embedded C language.

The main objectives of this project are:

1. Design of real time robot.
2. Wi-Fi control of robot directions and movement.
3. Real time human detection.
4. Buzzer based alert, if human presence is detected.

The learning’s provided by the project are:

1. IOT communication.
2. Interfacing WI-FI module to Microcontroller.
3. Characteristics of PIR sensor.
4. Interfacing PIR with controller.
5. DC motor working and need for motor driver.
6. Embedded C programming.
7. PCB design concepts.

The major building blocks of this project are:

1. Regulated Power supply.
2. ESP8266 Wi-Fi module.
3. Microcontroller
4. PIR Module.
5. Reset
6. DC Motors with driver.
7. Buzzer with driver.
8. Crystal
9. LED Indicators.

Software’s used:

1. PIC-C compiler for Embedded C programming.
2. PIC kit 2 programmer for dumping code into Micro controller.
3. Express SCH for Circuit design.
4. Proteus for hardware simulation.

Block diagram:

video:

This project makes use of an onboard computer, which is commonly termed as micro controller. It acts as heart of the project. This onboard computer can efficiently communicate with the output and input modules which are being used. The controller is provided with some internal memory to hold the code. This memory is used to dump some set of assembly instructions into the controller. And the functioning of the controller is dependent on these assembly instructions.

The main controlling device of the project is PIC Microcontroller. IR sensor, PIR sensor, KEY, GSM, LCD display is interfaced to the PIC microcontroller.PIC microcontroller continuously read the data from sensors and KEY.When the person switches OFF the vehicle ignition, then Microcontroller will monitor the baby motion inside the CAR using sensor. When the system detects the baby, then message will send to the predefine mobile number through GSM if the vehicle ignition is OFF condition. Otherwise, it’s not possible.To achieve this task microcontroller loaded program written in embedded C language.

• Power Supply.
• PIC Microcontroller.
• IR sensor.
• PIR sensor.
• GSM
• KEY
• LCD display.

Software’s used:

• PIC-C compiler for Embedded C programming.
• PIC kit 2 programmer for dumping code into Micro controller.
• Express SCH for Circuit design.
  
  
  

video:

The objective of this project is fulfilled by employing a DTMF mobile, a microcontroller, few DC motors for direction control, and an interfacing between the different modules of the project and the controller.

The project makes use of a microcontroller which acts as a central controlling unit. This module is capable of communicating with the input and the output modules. The controller makes use of a PIR based input sensor to sense the human being and give us an alert indication through a buzzer that alerts the presence of humans. We also make use of a mobile phone, which is used to control the robot. Also, the Microcontroller continuously checks for bombs in its presence and alerts the user through buzzer, if present. The output module is formed by the motors used for controlling the direction of the robot i.e. the forward, left, right and backward movement of the robot. To perform the task, Microcontroller is loaded with an intelligent program written in embedded ‘C’ language.

The main objectives of this project are:

1. Design of real time robot.
2. Mobile phone control of robot directions and movement.
3. Real time human detection.
4. Buzzer alerts.

The learning’s provided by the project are:

1. Characteristics of PIR sensor.
2. Characteristics of bomb detection sensor.
3. Interfacing PIR with controller.
4. DC motors controlling through controller.
5. DTMF decoder interfacing with microcontroller.
6. Embedded C programming.
7. PCB design concepts.

The major building blocks of this project are:

1. Regulated Power Supply.
2. Microcontroller.
3. DTMF decoder.
4. PIR Module.
5. Bomb detector.
6. DC Motors with driver.
7. Buzzer with driver.
8. Crystal.
9. LED Indicators.

Software’s used:

1. PIC-C compiler for Embedded C programming.
2. PIC kit 2 programmer for dumping code into Micro controller.
3. Express SCH for Circuit design.
4. Proteus for hardware simulation.

Regulated Power Supply:

Block diagram:

video:

The main object of this project:

1. Detect unauthorized entry using sensors.
2. Send real-time alerts via SMS.
3. Activate alarms to deter intruders.
4. Monitor ambient light for unusual activity.
5. Ensure system reliability with stable power supply.

The major building blocks of this project are:

• Power Supply.
• Arduino UNO.
• PIR.
• GSM.
• Laser.
• LDR.
• Buzzer.

Software’s used:

1. ARDUINO IDE STUDIO compiler for Embedded C programming.
2. Express SCH for Circuit design.

Block Diagram:

video: