In this system, RFID technology is used for user authentication and book issuing/return processes. Each user is provided with an RFID tag, enabling seamless and fast transactions. A Pi Camera connected to the Raspberry Pi scans QR codes placed on books for quick and accurate identification. All book and student details such as Roll Number, Book Name, Issue Time, Return Time, and Pending Status are stored and managed through a web-based application hosted on the Raspberry Pi. An LCD display provides real-time status updates such as successful issue, return confirmation, or pending alerts. The web portal allows users and administrators to browse books, reserve titles, monitor inventory, and track transaction history remotely.

To enhance security, an advanced theft detection mechanism is implemented at the library entrance. An ESP32-CAM is installed at the gate section to scan QR codes of books during exit. If a book’s details are not found in the central database or if it has not been officially issued, the system identifies it as unauthorized. The ESP32-CAM module communicates with the main Raspberry Pi system through a wired connection. Upon detecting an unissued book, the system activates a buzzer alert and LED indication, and the gate automatically closes using a servo motor mechanism to prevent unauthorized removal. Conversely, if the book is properly issued and verified in the database, the gate remains open, allowing the user to exit smoothly.

By integrating RFID authentication, QR code scanning, real-time web monitoring, automated gate control, and intelligent theft detection, the proposed system significantly reduces manual intervention, improves operational efficiency, ensures accurate record management, and enhances library security. This smart automation solution provides a reliable, scalable, and cost-effective approach for next-generation digital libraries.

Features:

  Centralized control using Raspberry Pi 3B+

  RFID-based user authentication for fast book issue and return

  QR code scanning using Pi Camera for quick book identification

  Web-based real-time database management

  Student account management (Roll No, Book Name, Issue Time, Return Time, Pending Status)

  LCD display for instant transaction feedback

  Online book browsing and reservation through web portal

  Real-time inventory tracking and monitoring

  Theft detection at entrance using ESP32-CAM

  Automatic buzzer alert and LED indication for unauthorized books

  Servo motor-based automatic gate control

  Gate remains open for properly issued books

  Reduced manual intervention and improved operational efficiency

  Enhanced security and accurate record maintenance.

The major building blocks of this project are:

1. Power Supply.
2. Raspberry pi3 B+.
3. Pi Camera.
4. RFID reader and TAGs.
5. LCD display.
6. SD card.
7. Esp32 cam.
8. Servo for Gate.
9. Buzzer.
10. LED indication.

Software’s used:

1. Python programming.
2. Raspbian OS.

video:

To accommodate different bottle sizes, the water dispensing pipe can be adjusted manually before dispensing. After the user enters and confirms the desired quantity, the Arduino energizes a relay-controlled water pump/motor, initiating water flow. A flow meter sensor continuously measures the volume of water dispensed and provides real-time feedback to the controller. Once the selected quantity is delivered, the Arduino automatically stops the motor and activates the buzzer to notify the user that the dispensing process is complete.

The system also incorporates an ESP8266 Wi-Fi module to upload dispensing data, including water consumption details, to the ThingSpeak cloud platform for remote monitoring and record maintenance. An LCD display provides user instructions and system status, while Bluetooth connectivity enables communication with an Android mobile device. The proposed system offers a hygienic, accurate, secure, and IoT-enabled solution for smart water management in public places, offices, educational institutions, and commercial establishments.

Objectives of Intelli Flow: Smart Water Dispensing System

1. To provide secure access to the water dispensing system using RFID authentication, allowing only authorized users to dispense water.
2. To dispense a user-selected quantity of water accurately through a flow meter-based monitoring and control mechanism.
3. To automate the water dispensing process by controlling the water pump through an Arduino Uno and relay module.
4. To monitor and record water consumption data in real time and upload it to the ThingSpeak cloud platform using the ESP8266 Wi-Fi module.
5. To provide user-friendly operation and alerts through an LCD display, keypad input, and buzzer notifications for system status, completion, and unauthorized access.

Components Used:

• Regulated Power Supply.
• Arduino UNO Microcontroller.
• 4*4 KEYPAD.
• RFID reader and TAGs.
• DC motor for Water Dispenser.
• Flow Meter.
• ESP8266 WI-FI Module.
• Relay Control.
• Buzzer.
• Servo motor.
• I2C with LCD display.

Software’s used:

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

Regulated Power Supply:

Block Diagram:

video:

The transmission section is powered by solar energy, stored in a battery, and managed by a Arduino Nano microcontroller. An RFID system ensures authorized vehicle access. The power is wirelessly transmitted through eight relay-controlled coils, activated by infrared (IR) sensors and a pulse generator.

The receiving section is embedded in the EV and includes a copper coil connected to a charging circuit that transfers energy to the vehicle’s battery. An ESP-32 microcontroller monitors voltage levels via a voltage sensor, while an IR sensor detects the presence of charging zones. The DHT-11 sensor measures environmental conditions. A relay circuit manages power to four DC motors, and data is uploaded to ThingSpeak for remote monitoring.

This innovative IoT-enabled wireless charging system eliminates the need for frequent plug-in charging, offering a seamless and sustainable solution for electric vehicle users. The status of the project will display on LCD. To achieve this task Arduino Nano microcontroller loaded program written in embedded C language.

Features:

1. Solar-Powered Charging: Uses solar energy for sustainable power generation.
2. Wireless Power Transfer: Eliminates the need for physical charging cables.
3. RFID Authentication: Ensures only authorized vehicles receive power.
4. IR Sensor-Based Activation: Detects vehicle presence to activate charging coils.
5. IoT-Based Monitoring: Uses ESP-32 and ThingSpeak for real-time data tracking.
6. Arduino Microcontroller Control: Manages power distribution and relay operation.
7. Pulse Generator & Relays: Controls power transfer to charging coils.
8. DHT-11 Sensor: Monitors environmental conditions during charging.
9. Voltage Sensor Feedback: Ensures safe and efficient charging.
10. DC Motor Control: Enables powered vehicle movement during charging.

The major specifications of the modules used in the project are:

• Solar Panel: 12V–24V output for renewable energy.
• Arduino Microcontroller: 5V operation, multiple I/O pins.
• ESP-32: 3.3V, built-in Wi-Fi & Bluetooth for IoT.
• RFID Module: 13.56 MHz frequency for authentication.
• IR Sensors: 3.3V–5V, detects vehicle presence.
• DHT-11 Sensor: 0°C–50°C, 20%–90% RH humidity range.
• Voltage Sensor: 0V–25V range for battery monitoring.
• Relay Modules: 5V/12V for power control.
• Pulse Generator: Activates charging coils.
• Copper Coils: Enables inductive power transfer.
• ThingSpeak IoT: Real-time data logging & monitoring.
• DC Motors (4x): 6V–12V, powers vehicle movement.

Block diagram:

video:

Traffic signals: This project used Arduino Nano controller to program a priority-based traffic light controller for emergency vehicle. During emergency cases, emergency vehicle like ambulance can trigger the traffic light signals to change from red to green in order to make clearance for its path automatically using RFID technology. At traffic signals when the emergency vehicle comes near to the RFID reader, it will read that vehicle tag and identify whether it is normal vehicle or emergency. If the system detects emergency vehicle, it will turn on the GREEN LIGHT to clear the path. After passing the emergency vehicle, traffic lights work in normal mode to clear the traffic conjunction. RFID tag consists of ambulance number and patient health parameters.

Ambulance section: Pulse sensor, temperature sensor, ZIGBEE transceiver and LCD display which is interfaced to the Arduino Nano. Arduino Nano will continuously read the data from sensors will be displays on LCD module and upload this data into the near hospital wirelessly through Zigbee.

Hospital section: Hospital section consists of ZIGBEE transceiver along with PC. HyperTerminal application is used to monitor the ambulance number, driver phone number and patient health parameters. After checking this data doctor will accept and reject the patient from application.

The main objective of this project is:

• Automatic traffic lights control system.
• Automatic emergency vehicle (ambulance) detection using RFID.
• RFID based emergency vehicle detection and path clearance.
• Visible alerts using LCD display.
• Zigbee wireless technology for data sending and receiving.
• HyperTerminal for monitoring details.
• Sensor based patient health parameters monitoring system.

The major building blocks of this project are:

• Power Supply Block.
• Arduino NANOs.
• RFID readers and TAGs.
• Traffic lights (red, green, yellow).
• LCD display.
• ZIGBEE transceiver module.
• USBTTL.

Software’s used:

• Embedded C language.
• Arduino IDE studio for dumping the code into the microcontroller.
• Express SCH for Circuit design.

Regulated Power Supply:

video:

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 input module is the RFID reader which decodes the RFID tag which is with the animal. The decoded information of that animal is sent to the microcontroller, and the data of the animal like name of the animal ID number is displayed on android mobile using Bluetooth technology.

This Project consists of Microcontroller Unit, RFID reader and tag, HC-05 Bluetooth module. When the animals enter into the fencing area through the entrance, this system displays the data of the animal on android mobile using RFID and Bluetooth technology. The action of these Instructions is already loaded into the Microcontroller using Embedded C programming. The intelligent control software, which has been developed Embedded C programming language.

The objectives of the project include:

1. Monitoring animals using RFID technology.
2. The data of the animal is displayed on android mobile using Bluetooth technology.

The major building blocks of this project are:

1. Regulated Power Supply.
2. RFID reader.
3. RFID tag.
4. PIC Micro Controller.
5. Hc-05 Bluetooth.
6. Crystal oscillator.
7. Reset button.
8. 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.

Regulated Power Supply:

Block diagram:

video:

Automation is the most frequently spelled term in the field of electronics. The hunger for automation brought many revolutions in the existing technologies. One among the technologies which had greater developments is RF communications. The result of this is the RFID cards which transmit a unique identification number. This number transmitted by the RFID can be read with the help of a RF reader.

We make use of both these devices to construct a prepaid card for petrol station systems based on RFID. The concerned person of the vehicle should initially deposit money in the card using keypad. The RFID reader is interfaced to the on board computer is commonly termed as micro controller. The reader decodes the RFID tag which is with the vehicle and the amount is reduced from the prepaid card and this information is fed as input to microcontroller. The controller reads this input and controller starts operating the dispensing motors until the required amount of petrol is dispensed into the vehicle. The dispensing system forms the output module and is interfaced to the same onboard computer. The input from RFID is also displayed on the Graphical LCD for the acknowledgement of the user.

Features:

1. Real time authentication system
2. Low power consumption.
3. Long life.
4. Accuracy in the amount of petrol dispensed.
5. Highly sensitive.

This project provides exposure to the following technologies:

1. Interfacing Dispensing system and microcontroller.
2. Interfacing RF reader and microcontroller.
3. Embedded C programming for microcontroller.
4. Design of PCB.
5. GLCD interfacing and programming.

The major building blocks of this project are:

1. Regulated power supply.
2. RFID reader.
3. RFID tag.
4. Microcontroller
5. Graphical LCD.
6. Keypad
7. Crystal
8. Dispensing system.
9. LED Indicators.
10. Buzzer

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.

Block Diagram:

video:

Automation is the most frequently spelled term in the field of electronics. The hunger for automation brought many revolutions in the existing technologies. One among the technologies which had greater developments is RF communications. The result of this is the RFID cards which transmit a unique identification number. This number transmitted by the RFID can be read with the help of a RF reader.

The project consists of a RFID module, voice module, and a microcontroller mother board. The RFID tags are attached to the busses and the entire system is at the bus stop. Whenever the bus reaches the bus stop the RFID tag attached to the bus is decoded by the RFID reader at the bus stop and announces the bus information using voice module.

Micro controller is the heart of the device. It stores the data of the buses and the RFID reader which is interfaced to the microcontroller decodes the RFID tag attached to the bus. Whenever the bus reaches the bus station the system gives an alerting voice message of the bus information. This device is designed to provide with a greater advantage producing voice based announcement for the user especially for the blind /illiterate person to recognize the bus required to reach the destination area.

The main features of this project are:

1. Voice based announcement regarding bus information.
2. Very helpful for blind and illiterate people.

This project provides learning’s on the following advancements:

1. Characteristics of voice module.
2. Voice generation circuit.
3. RFID module.
4. Conversion of AC supply to DC supply.
5. Embedded C programming.
6. PCB design.

     The major building blocks of this project are:

1. Regulated Power Supply
2. RFID reader and RFID tag.
3. Voice Circuit
4. Micro controller.
5. Crystal oscillator.
6. 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:

The RFID reader is interfaced with the microcontroller and RFID tag is attached to each and every good package.When the goods are placed in the trolley the RFID tags attached to the goods are decoded by the RFID reader interfaced to the microcontroller and the information is stored and displayed on LCD. The system automatically sends the selected goods number along with cost onto the PC of billing counter using wireless ZigBee.

The proposed system consists of two sections:

(i) Trolley section (user)

(ii) Billing section

The Trolley section consists of RFID module, Zigbee module, LCD display and microcontroller. The input module is the RFID reader which gives the information of the goods when it decodes the RFID tag of the good, this information is displayed on the LCD along with cost details. The output modules isLCD. The RFID reader continuously checks the placing of the goods package inside the trolley or removing from the trolley using RFID tag attached to it and these details along with the cost is automatically uploads onto the PC section or billing counter section. Costumer will pay the bill through Bluetooth using mobile and send this data like cart no and paid money to the PC using wireless ZIGBEE.

The monitoring or billing section mainly connected with the computer at the bill counter consists of another RFID reader interfaced with microcontroller along with LCD, buzzer modules. The details of selected items along with costs are automatically fed as input to microcontroller using zigbee module and displayed on to the monitor of PC. The RFID reader which is located at the exit section will check the RFID tags attached to the goods have been made hidden with customers and alerts the shop keepers with panic alarming unit. The entire data related to goods are stored in the microcontroller and also displays on LCD. This application is very useful in big shopping malls to store data of all the goods in thedepartmental stores, and to display on LCD using RFID technology.

1. User-friendly interfacing.
2. Information related to the goods display on LCD.
3. Automatic billing with selected items onto the billing counter PC using wireless zigbee
4. Audible and visual alerts using LCD and buzzer
5. RFID based Wireless Communication.
6. Automatic Hidden items or stolen items identification and alerting using RFID and buzzer.

This project provides exposure to the following technologies:

1. Behavior of RFID module.
2. Interfacing RFID module with the PIC.
3. RFID reader and Tags.
4. Interfacing geared LCD and driver with microcontroller.
5. Embedded C programming.
6. PCB designing.

The main building blocks of the project are:

1. Regulated Power Supply.
2. PIC Microcontroller.
3. RFID reader.
4. RFID tag.
5. Zigbee module.
6. Reset.
7. Crystal.
8. LCD display with driver.
9. Buzzer with driver.
10. Bluetooth.
11. LED indicators.

Software’s used:

1. PIC C compiler for Embedded C programming.
2. Express SCH for Circuit design.
3. Proteus for hardware simulation.

To implement this project we are using microcontroller, RFID, LCD (16×2) and Buzzer. It will consist of RFID reader. All the items in the mall will be equipped with RFID tags. When person put any item in the trolley its code will be detected and the price of that item will be stored in memory. As we put the items the costs will get added to total. Thus, the billing will be done at the trolley itself. The entire data related to goods are stored in the microcontroller will be displays on LCD along with Buzzer and LED. For detecting different items RFID reader will be used. LCD used will be 16X2 liquid crystal display. It will be used to display item names, item cost and total bill. By using push button, we can remove the items from trolly and automatically that particular item cost will reduce from total amount. The entire system works with a battery power.

The Microcontroller is programmed using Embedded C language which provides effective environment for performing the task of the project. Express PCB software is extracted to design the circuit boards.

The major building blocks of this project are:

1. Battery power supply.
2. Arduino nano Micro controller.
3. RFID TAGs.
4. RFID Reader.
5. Push button.
6. Buzzer.
7. LCD display.
8. RED, GREEN LED indicators.

Software’s used:

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

BLOCK DIAGRAM:

video:

Automation is the most frequently spelled term in the field of electronics. The hunger for automation brought many revolutions in the existing technologies. One among the technologies which had greater developments is RF communications. The result of this is the RFID cards which transmit a unique identification number. This number transmitted by the RFID can be read with the help of a RFID reader.

The RFID reader is interfaced with the microcontroller and RFID tag is attached to each and every good package. When the goods are moving on the trolley with the RFID tags attached to every product are decoded by the RFID reader interfaced to the microcontroller and display the bill and product name on LCD along with buzzer.

The project consists of RFID module, LCD display and Arduino Nano microcontroller. The input module is the RFID reader which gives the information of the product when it decodes the RFID tag of the product, this information is displayed on the LCD. The output module is LCD. When the RFID tag of the product is decoded by the RFID reader, the system and continuously monitors. The entire data related to goods are stored in the microcontroller and also displays on LCD along with buzzer.

This application is very useful in big shopping malls to store data of all the products in the departmental stores, and to display on LCD using RFID technology.

This project makes use of an onboard computer, which is commonly termed as micro controller. It acts as heart of the project. This Arduino 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.

This ensures a smooth inventory management. The integrated system is built around microcontroller and has a 16×2 LCD display unit and miscellaneous circuit including power supply. The Microcontroller is programmed using Embedded C language which provides effective environment for performing the task of the project.

The major building blocks of the project are

• Adapter power supply.
• Arduino nano Micro controller.
• RC522RFID reader and tags.
• LCD display.
• Buzzer.

Software’s used:

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

Block diagram:

video: