Once the robot reaches the fire, a servo motor rotates the water spray nozzle to accurately aim at the flame. The Arduino activates a relay to switch on the DC water pump, which sprays water directly onto the fire. The servo-controlled nozzle ensures effective water distribution, helping to extinguish the fire quickly while reducing water wastage.

The entire system is powered by a rechargeable battery, and an LM2596 voltage regulator provides the required operating voltage to the electronic components. This low-cost and portable robot can be used for educational purposes, laboratories, homes, and small industrial environments, demonstrating an efficient and safe method for automatic fire detection and suppression.

Objectives:

• To design and develop an Arduino-based autonomous firefighting robot.
• To detect fire using three flame sensors mounted on the front side of the robot.
• To move the robot automatically toward the detected fire source.
• To control the robot’s movement using DC motors and an L298 motor driver.
• To activate a DC water pump through a relay for extinguishing the fire.
• To use a servo motor for precise control of the water spray nozzle direction.
• To provide a low-cost, portable, and efficient fire detection and suppression system.
• To improve safety by reducing the need for human intervention in handling small fire accidents.

The major building blocks of this project are:

• Battery power supply.
• ARDUINO NANO Micro controller.
• Three Fire sensors.
• DC motor along with L298 driver.
• Water motor.
• Relay.
• LM2596 module.
• Servo Motor.

Software’s used:

• Embedded C program.
• ARDUINO IDE studio.

video:

The robot is equipped with a PIR sensor to detect the presence of live human beings and a bomb detection sensor to identify suspicious explosive or metallic objects. When either sensor detects a target, the Arduino activates a buzzer to provide an immediate warning to the operator. A LM2596 voltage regulator ensures a stable power supply to all electronic components.

This system provides a safe and cost-effective solution for remote surveillance, bomb detection, and human presence monitoring in sensitive locations such as military zones, public places, airports, railway stations, and disaster-affected areas. By allowing operators to control the robot from a distance, it helps reduce the risk to human life while improving the efficiency of security and rescue operations.

Objectives:

• To design and develop a mobile phone-controlled robot using an Arduino Nano and GSM (DTMF) communication.
• To enable remote movement of the robot using the mobile phone keypad after making a call.
• To detect the presence of live human beings using a PIR sensor.
• To detect suspicious bombs or explosive/metallic objects using a bomb detection sensor.
• To provide an instant warning through a buzzer whenever a human or bomb is detected.
• To reduce human risk by enabling surveillance and inspection in dangerous or restricted areas.
• To develop a low-cost, reliable, and easy-to-operate security robot for defense and public safety applications.

The major building blocks of this project are:

1. Battery.
2. LM2596.
3. Arduino Nano Microcontroller.
4. GSM.
5. PIR Module.
6. Bomb detector
7. DC Motors with L298 driver.
8. Buzzer.

Software’s used:

1. Embedded C programming.
2. Arduino IDE for dumping code into Micro controller.
3. Express SCH for Circuit design.

Block Diagram:

video:

The rapid growth of precision agriculture demands intelligent monitoring systems that can optimize water usage, improve crop productivity, and reduce energy consumption. This project presents an Energy-Efficient All-Dynamic Multiparameter Sensor System for Battery-Less Smart Nodes in Agricultural Internet of Things (AIoT) using a Raspberry Pi Zero 2W as the central processing unit. The system continuously monitors important environmental parameters such as soil moisture, temperature, humidity, rainfall, and light intensity using a Capacitive Soil Moisture Sensor, DHT22 Sensor, Rain Sensor, and LDR Module. The status of the project will display on LCD. Here Arduino NANO  works as a ADC converter.

The collected sensor data is transmitted to a web-based monitoring platform, allowing farmers to remotely observe real-time field conditions from anywhere through the internet. To enhance decision-making, the system incorporates Machine Learning algorithms that analyze past and present sensor data to predict future soil moisture levels and weather conditions. Based on these predictions, the system intelligently determines the irrigation requirements of the field.

An automatic irrigation control mechanism is implemented using a relay-driven AC water motor. When the predicted soil moisture level falls below a predefined threshold and no rainfall is expected, the system automatically activates the water motor. Similarly, the motor is turned OFF when sufficient soil moisture is achieved or rainfall is predicted, thereby preventing water wastage and improving irrigation efficiency.

The proposed battery-less and energy-efficient architecture minimizes maintenance requirements while ensuring continuous operation. By integrating IoT, Machine Learning, cloud monitoring, and automated irrigation control, the system provides a smart, sustainable, and cost-effective solution for modern agriculture, helping farmers conserve water, reduce labor, and maximize crop yield.

Objectives:

1. To monitor soil moisture, temperature, humidity, rainfall, and light intensity using sensors.
2. To display sensor data on a web page for remote monitoring.
3. To display sensor data on LCD for local monitoring.
4. To store sensor data for future analysis.
5. To predict future soil moisture levels using Machine Learning.
6. To forecast weather conditions based on collected sensor data.
7. To automatically control the AC water motor using a relay.
8. To reduce water wastage through smart irrigation.
9. To improve crop growth and agricultural productivity.
10. To minimize human effort in irrigation management.
11. To develop an energy-efficient IoT-based smart farming system.

The major building blocks of the project are:

• Regulated Power Supply.
• Raspberry pi zero 2W.
• Arduino NANO.
• SD card.
• LDR sensor.
• DHT22 sensor.
• Capacitive Soil sensor.
• Rain sensor.
• Relay with AC motor.
• LCD display.

Software’s used:

1. Raspbian OS.
2. Machine Learning.
3. Express SCH for Circuit design.

Block diagram:

video:

The robot is powered by a rechargeable battery, and a LM2596 is used to regulate the voltage for safe operation of electronic components. Movement is achieved using three stepper motors controlled via a motor driver, allowing precise and stable navigation. Additionally, a servo motor is incorporated to control a gripper mechanism for object handling tasks such as picking and placing small items.

The cylindrical structure of the robot provides compactness and improved balance, making it suitable for confined environments. The system demonstrates efficient integration of wireless communication, motor control, and mechanical design. This project can be applied in areas such as industrial automation, material handling, and educational robotics, and it can be further enhanced with sensors and IoT-based automation for advanced applications.

Objectives:

• To design and develop a Bluetooth controlled cylindrical mobile robot.
• To implement wireless communication using the HC-05 Bluetooth Module for real-time control
• through a smartphone.
• To use the Arduino Nano as the main controller for processing commands and controlling system
• To achieve smooth and precise robot movement using stepper motors and a motor driver.

• To integrate a servo motor-based gripper mechanism for pick-and-place operations.
• To design a stable cylindrical structure for improved balance and compactness.
• To ensure proper power management using a rechargeable battery and LM2596.
• To develop a system suitable for applications like material handling, surveillance, and educational robotics.

Components used:

• Battery Power Supply.
• Arduino Nano.
• HC-05 Bluetooth Module.
• Three Stepper Motors.
• Stepper Motor Driver.
• Servo Motor.
• Gripper.
• Thread Screw Mechanism.
• Connecting Rods.
• MS steel metal.

Software used:

• Embedded C Language.
• Arduino IDE.
• Express SCH for circuit design.

video:

The main controlling device of the whole system is an Arduino NANO Microcontroller. Single phase selection circuit, LCD and Relays are interfaced to microcontroller. Microcontroller continuously monitors three phases and selects the active phase from the input fed from single phase selection circuit. The selected active phase will be supplied to the load through relays connected to Microcontroller. Microcontroller displays the phase information on the LCD screen. By using this system user can know the activate phase status through SMS using GSM.

The objectives of the project are:

• The system consists of a single-phase selector circuit that monitors all three phases (R, Y, B).
• The monitored signals are fed into the Arduino Nano microcontroller, which makes the decision based on availability.
• If the main phase fails, the controller automatically switches to the next available phase using relay drivers and relays.
• LED indicators and LCD display provide visual indication of which phase is active.
• If all three phases fail, the system activates a buzzer alarm for immediate notification.
• The integrated GSM module sends SMS alerts to the user’s mobile phone about the status of the power supply (phase availability or failure).
• Thus, the system ensures continuous power supply and quick alerts during downtime.

The major building blocks of this project are: 

1. Regulated Power Supply
2. Arduino Nano Microcontroller.
3. LED Indicators.
4. Relays with driver.
5. Single phase selection circuit
6. GSM.
7. LCD with driver.
8. Buzzer.

Software’s used:

1. Embedded C programming.
2. Arduino IDE programmer for dumping code into Microcontroller.
3. Express SCH for circuit designing.

Regulated power supply:

Block Diagram:

video:

The Energy Meter continuously measures the electricity consumption of the connected AC load. The pulses generated by the meter are isolated through an optocoupler and fed to the Arduino Nano, which calculates the real-time energy usage and corresponding billing amount. This information is displayed locally on an LCD screen for the consumer’s reference and is also transmitted to the user’s mobile phone via the GSM module in the form of periodic SMS alerts.

If the consumer fails to pay the electricity bill within the specified time, the Electricity Department can remotely send a control SMS to the GSM module. Upon receiving the command, the Arduino activates the relay driver and disconnects the AC load through the relay, thereby cutting off the power supply. Once payment is completed, another SMS command can restore the power.

This GSM-enabled smart billing and load control system enhances transparency, reduces manual intervention, ensures timely bill payment, and supports automation in energy distribution networks. It can be effectively used by power utility companies to monitor consumption, send alerts, and manage load control in a reliable and user-friendly manner.

Objectives:

• To continuously monitor electricity consumption using an energy meter and accurately calculate real-time billing through Arduino Nano.
• To provide automatic billing updates to the consumer by sending periodic SMS alerts through the GSM module.
• To enhance transparency in energy usage by displaying consumption and billing details on an LCD screen.
• To reduce manual meter reading efforts by enabling remote and automated communication between the consumer and electricity department.
• To integrate a remote load control mechanism, allowing the electricity board to disconnect the power supply using an SMS command if the user fails to pay the bill on time.
• To ensure safe switching of the AC load through an isolated relay and relay driver circuit to prevent electrical hazards.
• To maintain proper electrical isolation using an optocoupler to safely interface the energy meter pulses with the microcontroller.
• To support quick reconnection of supply once the bill is paid, using authenticated SMS commands.
• To develop a reliable, low-cost, and user-friendly GSM-based energy management system suitable for households, commercial buildings, and utility providers.

The major building blocks of this project are:

1. Regulated Power Supply.
2. ARDUINO NANO.
3. GSM Modem.
4. Digital Energy Meter.
5. Optocoupler.
6. Relay with driver.
7. LCD with driver.

Software’s used:

1. Arduino IDE Studio compiler for Embedded C programming.
2. Express SCH for Circuit design.

Regulated Power Supply:

video:

The system uses an ultrasonic sensor to detect obstacles. If an obstacle is detected, the rover automatically stops to avoid collisions and improve safety. A fire sensor, DHT11 temperature and humidity sensor, and vibration sensor continuously monitor environmental conditions and detect abnormal events such as fire, excessive vibration, or unauthorized movement. When an emergency is detected, the GSM module sends an SMS alert to the registered user for immediate action. The L298 motor driver controls the DC motors, while an LM2596 voltage regulator provides a stable power supply from the battery. An LED indicator displays the system status.

This surveillance rover offers a low-cost, portable, and efficient solution for remote security monitoring. It enhances safety by providing live video, environmental sensing, obstacle avoidance, and instant alert notifications, making it suitable for security surveillance, industrial inspection, warehouse monitoring, and disaster-prone environments.

Objectives of the project:

1. To provide real-time video surveillance using the ESP32-CAM for remote monitoring.
2. To enable wireless control of the rover through a web interface.
3. To detect obstacles using an ultrasonic sensor for safe movement.
4. To monitor environmental conditions such as fire, temperature, humidity, and vibrations.
5. To send SMS alerts through the GSM module during emergency situations for improved security.

The major building blocks of the project are:

• Battery power supply.
• LM2596.
• ARDUINO NANO Microcontroller.
• ESP32 camera module.
• Ultrasonic sensor.
• DHT11 sensor.
• FIRE sensor.
• VIBRATION sensor.
• Servo Motor.
• DC motors with L298 Motor Driver.
• GSM.
• LED indications.

Software’s used:

• Embedded C programming.
• Arduino IDE programmer for dumping code into Micro controller.
• Express SCH for Circuit design.
• WEB technology.

video:

The delta robot mechanism consists of three servo motors placed at the joints of the robot arms, which control the movement of the end effector in multiple directions such as front, back, left, and right. The robotic structure includes distal joints connected through parallelogram linkages, ensuring stable and precise movement of the lower base plate. A suction gripper mechanism driven through a relay-controlled suction motor is mounted at the end effector to perform pick-and-place operations. A stepper motor with an L298 driver is used to provide additional front-and-back motion, improving the working range of the robot. Two limit switches are incorporated to ensure safety and proper positioning during operation.

The servo motors are controlled by pulse signals generated by the Arduino Nano microcontroller, which is programmed to coordinate the movements of all joints while preventing collisions between links. The integration of IoT technology enables remote monitoring and control, making the system suitable for modern automation applications. This project demonstrates an efficient, low-cost robotic solution for automated sorting tasks in industrial and laboratory environments.

Objective:

  To design and fabricate a delta robot mechanism for pick-and-place operations.

  To integrate ESP32-CAM for live video monitoring through the internet.

  To control the robotic movements using Arduino Nano and servo motors.

  To implement a suction gripper system for object picking and placement.

  To use limit switches for safe and accurate positioning of the robot.

  To develop a web interface for remote control and monitoring.

The main building blocks of the project are:

• Power supply.
• ESP32 CAMERA.
• Three Servo motors.
• Stepper Motor with l298 driver.
• Arduino Nano.
• LCD display.
• Relay along with Suction Motor
• Two limit switches.

Software’s used:

• Arduino IDE for Embedded C programming.
• Express SCH for Circuit design.

video:

The robot is controlled through a web browser interface using IoT technology, allowing the user to operate it remotely via an Android smart phone. An ESP32 camera module is integrated to provide real-time live video streaming. By viewing the live stream, the user can accurately control the robot’s movement and monitor the surroundings in real time.

The robot is equipped with a metal sensor to detect metallic objects such as landmines or explosive devices. When metal is detected, the system immediately activates a buzzer alert and sends an email notification along with GPS location details to the concerned authorities. For mobility, an L298 motor driver is used to control the DC motors, ensuring smooth navigation.

Additionally, the robot includes a headlight for visibility in low-light conditions and a laser light for indication or targeting purposes. Both can be controlled remotely through the web interface while observing the live video feed. This system is highly useful for defense surveillance, bomb detection, and security applications, minimizing human risk by enabling remote operation in dangerous environments. To achieve this task microcontroller loaded program written in embedded C language.

Objectives of the project:

• To design and develop an IoT-based surveillance robot for monitoring hazardous and war field environments.
• To enable remote control of the robot through a web browser using an Android smartphone or computer.
• To provide real-time live video streaming using an ESP32 camera for effective surveillance.
• To implement metal detection capability for identifying bombs or hidden metallic threats.
• To generate instant alerts using a buzzer when metal is detected.
• To send email notifications along with GPS location to concerned authorities for quick response.
• To control robot movement efficiently using DC motors driven by an L298 motor driver.
• To integrate a headlight for clear visibility in dark or low-light conditions.
• To include a laser light for targeting or indication during surveillance operations.
• To utilize solar-powered charging for improved energy efficiency and longer operation time.
• To minimize human involvement in dangerous areas, thereby enhancing safety and reducing casualties.

The major building blocks of the project are:

• Solar.
• Charging circuit.
• Rechargeable Battery power supply.
• ARDUINO Nano Microcontroller.
• ESP32 camera module.
• Metal Detection Sensor.
• DC motors with L293d.
• Buzzer.
• Laser Light.
• GPS.
• LED indications.

Software’s used:

• Embedded C programming.
• Arduino IDE programmer for dumping code into Micro controller.
• Express SCH for Circuit design.
• IOT technology for sending mail.
• WEB technology for robot control.

video:

The rescue rover is built around an Arduino Nano microcontroller, which acts as the central control unit. A LoRa module enables long-distance, low-power wireless communication between the rover and the user. Upon receiving target coordinates, the robot autonomously moves toward the destination using real-time GPS data and a digital compass for navigation. Once the rover reaches the target location, it sends a confirmation message to the user and continuously transmits latitude and longitude values, temperature data, and gas concentration levels to assist in situational assessment.

An ESP32-CAM module is integrated to provide live video streaming, allowing real-time visual monitoring of the disaster area on the user’s mobile device. The rover is driven using DC motors controlled through an L298 motor driver, ensuring reliable movement over rough terrain. In case of Wi-Fi disconnection during operation, the system ensures fail-safe communication by notifying the user through the serial monitor using LoRa, thereby maintaining operational reliability.

The proposed rescue rover enhances disaster response by enabling remote surveillance, environmental monitoring, and autonomous navigation in dangerous zones. This system reduces risks to human rescuers and provides timely, accurate information, making it a cost-effective and efficient solution for disaster management applications.

Features of Rescue Rover Robot:

  The robot can be controlled from a long distance using LoRa communication.

  The user can send GPS coordinates, and the robot will move automatically to that location.

  It shares its current location (latitude and longitude) continuously.

  A camera provides live video streaming to the user’s mobile phone.

  The robot can measure temperature in the disaster area.

  It can detect harmful gases using a gas sensor.

  Once the robot reaches the given location, it sends a confirmation message to the user.

  If the Wi-Fi connection is lost, the robot alerts the user through LoRa/serial monitor.

  DC motors allow the robot to move smoothly on rough surfaces.

  The system is battery powered, making it easy to carry and deploy.

  It helps rescue teams monitor dangerous areas without human presence.

The major building blocks of this project are:

• Rechargeable battery.
• ESP32 Camera.
• TWO Arduino Nano modules.
• DC motor with l298 driver.
• GPS.
• Digital compass.
• Temperature sensor.
• GAS sensor.
• LoRa Modules.
• PC.

Software’s used:

1. Arduino IDE for compiling and dumping code into ESP32 Camera and Arduino NANO.
2. Express SCH for Circuit design.

video: