E&TC / ECE · RFID, smart card and biometric · Final year project
Cashless Money Transfer Wrist Band
A wearable wristband for cashless payments. It pairs with a phone over Bluetooth and authenticates the user with a fingerprint before transferring money, making small payments quick and secure.
What is the Cashless Money Transfer Wrist Band project?
A wearable wristband for cashless payments. It pairs with a phone over Bluetooth and authenticates the user with a fingerprint before transferring money, making small payments quick and secure.
Key facts
- Type
- Final year project · Beginner to intermediate
- Suitable for
- Diploma capstone and B.E / B.Tech final year
- Build time
- 3 to 4 weeks
- Estimated component cost
- ₹3,300 – ₹4,900
- Guidance from
- ₹9,999 (Hardware / IoT Final Year)
How the Cashless Money Transfer Wrist Band works
- 12 V power adapter / step-down transformer supplies the circuit; a regulator gives the controller and sensors a steady 5 V.
- The Fingerprint sensor captures and matches fingerprints to authenticate the user.
- The Arduino Uno R3 reads the inputs, runs the decision logic written in C/C++ and drives the outputs.
- The Bluetooth module links the circuit to a smartphone app so the user can send commands or receive readings.
Block diagram
Inputs
Fingerprint sensorController
Arduino Uno R3Communication
Bluetooth moduleComponents list and cost
Typical prices from Indian online stores and electronics markets (Lamington Road, Budhwar Peth, SP Road). Buy from one store where you can to save on shipping.
| Component | Qty | What it does | Approx. cost |
|---|---|---|---|
| Arduino Uno R3 | 1 | Reads the inputs, runs the decision logic written in C/C++ and drives the outputs. | ₹550 |
| Fingerprint sensor (R307) | 1 | Captures and matches fingerprints to authenticate the user. | ₹1,300 |
| Bluetooth module (HC-05) | 1 | Links the circuit to a smartphone app so the user can send commands or receive readings. | ₹280 |
| 12 V power adapter / step-down transformer | 1 | Supplies stable low-voltage power from the mains. | ₹250 |
| Passive components, PCB and wiring kit | 1 | Resistors (assorted), capacitors (assorted), PCB / breadboard and cables, connectors and jumper wires. | ₹310 |
| Wiring, PCB, soldering and enclosure | 1 | Project overhead | ₹450 |
| Demo model base / mounting board | 1 | Project overhead | ₹500 |
| Testing spares and replacements | 1 | Project overhead | ₹300 |
| Estimated total | Varies with brand, quality and city | ₹3,300 – ₹4,900 |
Prices are estimates for budgeting. We confirm the bill of materials when your design is frozen, and components are charged at actual cost with bills.
How much does this project cost?
| Option | What you get | Cost |
|---|---|---|
| Components only | You buy the parts and build it yourself | ₹3,300 – ₹4,900 |
| Hardware / IoT Final Year | Working model or guided build, Circuit diagram and bill of materials, Firmware / code with explanation | from ₹9,999 + components |
| Capstone Project (CPE) | Working project or model, Black book in MSBTE format, Step-by-step explanation | ₹9,999 + components |
| Diploma ITR | 100% working source code, Project report PDF, PPT | ₹1,999 + components |
No GST and no hidden charges. Use the cost calculator for a quote with your deadline and add-ons, or see all plans.
Download the project brief (PDF)
Summary, working, components and cost and viva questions on one branded PDF to show your guide or team. To get it developed, contact us on WhatsApp.
What you submit with this project
- Working model with circuit diagram and program code
- Project report or black book in your university's chapter order (block diagram, circuit, calculations, results)
- Presentation for the review and final viva
- Synopsis for topic approval, if your college asks for one
E&TC / ECE viva questions on this project
What is the aim of the Cashless Money Transfer Wrist Band project?
A wearable wristband for cashless payments. It pairs with a phone over Bluetooth and authenticates the user with a fingerprint before transferring money, making small payments quick and secure.
Explain the working of your project in short.
12 V power adapter / step-down transformer supplies the circuit; a regulator gives the controller and sensors a steady 5 V. The Fingerprint sensor captures and matches fingerprints to authenticate the user. The Arduino Uno R3 reads the inputs, runs the decision logic written in C/C++ and drives the outputs. The Bluetooth module links the circuit to a smartphone app so the user can send commands or receive readings.
What microcontroller is on the Arduino Uno and what are its key specifications?
The Uno uses the ATmega328P: 8-bit, 16 MHz clock, 32 KB flash, 2 KB SRAM, 14 digital I/O pins (6 PWM) and 6 analog inputs with a 10-bit ADC.
How does the fingerprint sensor match a finger?
It captures an optical image, extracts minutiae points such as ridge endings and bifurcations, and compares them with templates stored in its flash memory. It returns a match ID or failure over UART.
How does the HC-05 Bluetooth module communicate with the microcontroller?
It uses UART serial at 9600 baud by default. Data typed in the phone app is received by the module and passed to the controller's RX pin as serial characters.
How is 230 V AC converted to 5 V DC for the circuit?
A transformer steps down the voltage, a bridge rectifier converts AC to pulsating DC, a capacitor smooths it and a 7805 regulator gives a steady 5 V.
Explain the block diagram of your project.
The input section senses the real-world quantity, the Arduino Uno R3 processes it according to the program, and the output section acts locally and sends the data or alert wirelessly. The power supply section feeds every block.
Which communication protocols are used between the modules?
UART (serial) for the GSM, GPS, Bluetooth or fingerprint modules. Each protocol was chosen because the module supports it and it uses the fewest pins.
What is the operating voltage of the circuit?
The controller and most sensors work at 5 V (ESP boards and some modules at 3.3 V). A 12 V adapter powers the board, and a regulator steps it down. Motors and relays get their own supply line so they do not reset the controller.
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Want to build Cashless Money Transfer Wrist Band?
Send your college, deadline and team size. We confirm the scope, cost and what you will submit.