Fingerprint Door Lock Kit with Arduino Uno + Sensor
Build a Fingerprint-Controlled Door Lock with Arduino Uno & R307 Sensor
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Imagine unlocking your room or lab with just a fingerprint — no keys, no codes. This kit guides you through building a fully functional biometric door lock using an Arduino Uno, a high-precision R307 optical fingerprint sensor, and an electromechanical solenoid. It’s a practical entry into smart security systems, ready to mount on a door panel or present as a college engineering project.
What You'll Build
You’ll assemble a working fingerprint door lock that scans, stores up to 127 fingerprints, and triggers a solenoid lock when an authorized print is detected. An LCD display gives real-time feedback — adding prints, showing access granted/denied, and system status — while a buzzer provides audio confirmation. The system runs on 12V DC, making it safe and portable for demonstration.
What You'll Learn
- Enrolling and managing fingerprint templates with the R307 optical sensor
- Interfacing a solenoid lock safely using a relay and flyback diode
- Programming Arduino for biometric authentication and multi-print database
- Displaying dynamic messages on a 16x2 LCD via I2C backpack
- Prototyping on PCB to create a rugged, compact module
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| R307 Fingerprint Sensor | 1 |
| 5V Solenoid Lock | 1 |
| 5V Relay Module | 1 |
| 16x2 LCD | 1 |
| I2C Backpack | 1 |
| Active Buzzer | 1 |
| 1N4007 Diode | 5 |
| 10kΩ Resistors | 5 |
| 220Ω Resistors | 5 |
| PCB Prototype Board | 2 |
| M-M Wires | 25 |
| 12V Adapter | 1 |
| Soldering Iron | 1 |
| Solder Wire | 1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
Designed for B.Tech ECE/EEE students building final-year or Smart India Hackathon projects, CBSE Class 12 students exploring embedded systems, and ATL Tinkering Lab mentors looking for a biometrics module. It’s also ideal for makers who want a reliable fingerprint security solution for their home or hostel room.
Built and Backed by Compoden
Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.
What if I get stuck during the build?
Scan the QR code included in the box to chat with our AI build companion trained specifically for this fingerprint lock project. If you need human help, our team is available via WhatsApp.
Can I install this on a real door?
Yes, the solenoid lock is rated for light-duty use and can be mounted on a door frame. The kit is designed as a functional prototype; you may need additional carpentry for permanent installation.
How do I add or delete fingerprints?
The provided code allows you to enroll new fingerprints via the serial monitor. The LCD guides you through the process, and the buzzer confirms each action. You can manage up to 127 prints.
Is the soldering iron necessary?
Yes, you'll need to assemble the relay circuit and a few connections on the PCB board. We include a soldering iron and solder wire to ensure you can build everything without extra tools.
R307 optical fingerprint sensor stores up to 127 prints and controls solenoid lock with LCD feedback.
What's in this kit
Choose your assembly option:
- Soldering Kit — 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
- Breadboard Combo — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.
Other projects you can build
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items