This system is designed around an Arduino microcontroller, two ultrasonic sensors, a 2-channel relay module, a DC water pump, a Spur Gear mechanism, a DC dynamo, a rechargeable battery, and an inverter. The Arduino acts as the central controller, while the ultrasonic sensors continuously monitor the positions of two water-filled buckets suspended on opposite sides of a pulley.

Initially, one bucket contains more water than the other, making it heavier. Due to gravity, the heavier bucket moves downward while the lighter bucket moves upward. The ultrasonic sensor attached to the descending bucket measures its distance from the ground and sends this information to the Arduino. When the bucket reaches a predefined position, the Arduino activates the 2-channel relay, which switches on the DC water pump.

The DC water pump transfers water from the heavier bucket to the lighter bucket. As water is transferred, the weight distribution between the buckets changes. Eventually, the previously lighter bucket becomes heavier and starts moving downward under the influence of gravity, while the other bucket moves upward. This continuous transfer of water creates a cyclic up-and-down motion of the buckets.

The movement of the buckets is transmitted through a spur gear mechanism, which is mechanically coupled to a DC dynamo. As the pulley rotates due to the alternating motion of the buckets, the dynamo converts the mechanical energy into electrical energy. The generated DC power is regulated through a charging circuit and stored in a rechargeable battery.

The stored DC power is then supplied to an inverter, which converts it into AC power. The AC output can be used to operate low-power electrical loads such as an AC LED bulb or other small household appliances.

This project demonstrates the conversion of gravitational potential energy into electrical energy using an automated water-transfer mechanism. The Arduino-based control system ensures continuous operation by monitoring bucket positions and controlling the DC water pump, making the system efficient and fully automatic for educational and experimental applications.

Features:

  Arduino-based automatic control system.

  Utilizes gravitational force for mechanical motion.

  Dual-bucket water balancing mechanism.

  Automatic water transfer using a DC water pump.

  Real-time bucket position monitoring using ultrasonic sensors.

  2-channel relay for automatic pump control.

  DC dynamo for electricity generation.

  Rechargeable battery for energy storage.

  Inverter converts DC power into AC output.

The Major building blocks of this project are:

1. Arduino board with power supply
2. Ultrasonic Sensors
3. DC Water Pump.
4. 2-channel Relay.
5. Dynamo
6. Charging Circuit.
7. Rechargeable Battery.
8. Inverter.
9. AC Bulb.
10. Gear Setup.

Block Diagram:

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The system is built around an Arduino Nano microcontroller, which continuously monitors four flame sensors positioned on all sides of the robot for 360-degree fire detection. In Auto Mode, the robot automatically moves toward the detected fire using DC motors driven by an L298 motor driver. A servo motor adjusts the direction of the water nozzle, and a relay-controlled DC water pump sprays water to extinguish the fire. Once the fire is extinguished, the robot resumes monitoring for further fire incidents.

In Manual Mode, the robot is controlled through a web interface, enabling the user to move the robot, switch between Auto and Manual modes, control the water pump, and operate additional functions remotely. An ESP32-CAM module provides real-time live video streaming, allowing the operator to monitor the environment and accurately navigate the robot in hazardous areas. The system is powered by a rechargeable battery with an LM2596 voltage regulator to provide stable power to all modules.

The proposed robot offers a cost-effective, reliable, and intelligent fire safety solution by combining autonomous fire detection, wireless remote control, and live video surveillance. It is suitable for applications in homes, offices, warehouses, laboratories, industrial plants, and other hazardous environments where quick fire detection and response are essential.

Objectives:

• To design and develop an intelligent fire-fighting robot capable of detecting and extinguishing fire automatically.
• To implement Auto and Manual operation modes for flexible robot control.
• To detect fire from all directions using four flame sensors for faster response.
• To provide live video surveillance using the ESP32-CAM for real-time remote monitoring.
• To enable wireless robot control through a web-based interface.
• To control the movement of the robot using DC motors driven by an L298 motor driver.
• To operate a servo-controlled water nozzle for accurate water spraying.
• To activate a DC water pump automatically or manually for fire extinguishing.
• To develop a compact, low-cost, and reliable fire safety system for homes, industries, offices, and hazardous environments.
• To improve firefighter safety by allowing remote operation in dangerous fire situations.

THE MAJOR BUILDING BLOCKS FOR THIS PROJECT:

1. Battery power supply.
2. LM2596.
3. ESP32 CAM.
4. Arduino NANO.
5. Relay.
6. DC Water motor.
7. Four Flame sensors.
8. Servo motor.

Software’s used:

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

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The system uses multiple sensors including four flame sensors positioned in four directions, a gas sensor, and a temperature sensor to continuously monitor the surrounding environment. These sensors send real-time data to the ESP32 microcontroller, which processes the information to detect the presence and location of fire. Once a fire is detected, the system automatically rotates a stepper motor controlled through a ULN2003 driver, enabling a 360-degree scanning and targeting mechanism to locate the fire source and a servo motor is used to adjust the direction of the water pump.

After identifying the direction of the fire, the ESP32 activates a relay-controlled DC water pump to spray water toward the affected area to extinguish the flames. Simultaneously, a buzzer alert is triggered to notify nearby people. The system also displays status information such as sensor readings and fire alerts on an LCD display for local monitoring.

In addition, the ESP32 sends real-time data such as temperature, Gas and fire detection status to the IoT cloud platform ThingSpeak, allowing users to remotely monitor the system through the internet. This enables quick response and continuous supervision from anywhere.

The proposed system provides automatic detection, precise fire localization, rapid extinguishing, and remote monitoring, making it a reliable and cost-effective solution for improving fire safety in homes, laboratories, industries, and warehouses.

Objectives:

• To detect fire using flame sensors, gas sensor, and temperature sensor.
• To identify the direction of fire using multiple sensors placed at different angles.
• To rotate the extinguisher mechanism using a stepper motor for 360° coverage.
• To automatically activate a water pump to extinguish fire.
• To provide audio alert using a buzzer during fire detection.
• To display system status on an LCD display.
• To send real-time data to ThingSpeak IoT cloud for remote monitoring.
• To adjust the direction of the water pump using servo motor.

The Major Building Blocks for This Project:

1. Regulated power supply.
2. ESP32 Microcontroller.
3. Stepper motor with ULN2003A.
4. Relay
5. DC Water motor.
6. Four Flame sensors.
7. GAS sensor.
8. Temperature sensor.
9. LCD display.’
10. Buzzer.
11. Servo motor.

Software’s used:

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

Regulated Power Supply:

Block Diagram:

video:

Objectives

1. To design and develop a solar-powered crop spraying system.
2. To utilize solar energy for operating a DC water pump.
3. To store generated energy in a rechargeable battery for continuous operation.
4. To provide a backup charging facility using AC power through a transformer.
5. To reduce dependence on fuel-powered and conventional electric sprayers.
6. To ensure efficient spraying of pesticides, fertilizers, and water on crops.
7. To minimize operating and maintenance costs for farmers.
8. To promote the use of renewable energy in agriculture.

The major building blocks of this project are:

• Charging Circuit.
• Solar panel.
• Rechargeable Battery.
• Switch.
• DC water pump.

video:

Objectives:

1. To make a smart water dispenser that gives water automatically when a coin is inserted.
2. To identify different coins like ₹1, ₹2, and ₹5 and give the correct amount of water (100 ml, 200 ml, 500 ml).
3. To use voice commands so the user can say “water” to start the process after inserting the coin.
4. To use an IR sensor to check if a glass is kept properly before pumping water.
5. To use Arduino Nano to control all sensors, the motor pump, and the display.
6. To show messages like “Insert Coin”, “Say Water”, and “Dispensing…” on the LCD display.
7. To save electricity by using a solar panel and rechargeable battery to power the system.
8. To provide clean, safe, and simple drinking water access in schools or public places.

The major building blocks of this project are:

• Solar Panel.
• Charging circuit.
• Rechargeable Battery.
• ARDUINO NANO.
• Multi-Coin sensor.
• IR sensor.
• Relay.
• DC water pump.
• HC-05 Bluetooth module.
• LCD display.

Software Used:

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

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