Fingerprint Attendance System Kit with Arduino Uno + Sensor
Build a Fingerprint Attendance System with Arduino Uno & R307 Sensor — Logs 127 Users to SD Card with Timestamp
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Create a reliable fingerprint attendance device that enrolls up to 127 users, authenticates each touch, and logs the timestamped entry to a microSD card. The 16x2 LCD shows the user's name on successful match. Perfect for school labs, college projects, or small offices that need a tamper-proof attendance record without manual registers.
What You'll Build
You'll assemble a standalone system where the R307 sensor captures and stores fingerprint templates in its flash memory. When a finger is placed, the Arduino matches it against enrolled prints; if verified, it writes the user ID plus date/time from the DS3231 RTC to an SD card as a CSV file. The I2C LCD provides real-time feedback—displaying "Place Finger," "Match Found: Name," or "Access Denied." The entire circuit runs on a breadboard, powered by a 9V battery or USB.
What You'll Learn
- Enroll, verify, and delete fingerprint templates using Arduino and the R307 sensor library
- Interface the DS3231 real-time clock to maintain accurate time across power cycles
- Implement a microSD card logger that writes attendance records with CSV formatting
- Display dynamic status messages on an I2C-controlled 16x2 LCD, minimizing wiring complexity
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| R307 Fingerprint Sensor | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 16x2 LCD | 1 |
| I2C Backpack | 1 |
| 10kΩ Resistors | 5 |
| 100nF Capacitors | 5 |
| 830-pt Breadboard | 1 |
| M-M Wires | 25 |
| 9V Battery Snap | 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 CBSE Class 11–12 students exploring embedded systems, B.Tech ECE/EEE undergraduates building semester projects, and participants in Smart India Hackathon or ATL Tinkering Labs. Whether you're at an IIT, NIT, VIT, or a community college, this kit turns a theoretical biometric concept into a working prototype you can demonstrate.
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 on the kit box to open the AI companion that knows this project inside out. It guides you step by step, and you can also reach us on WhatsApp for a quick reply.
Can I enroll more than 127 fingerprints?
The R307 sensor stores up to 127 templates. For larger needs, you could extend the project by offloading template storage, but this kit is built around the sensor’s native capacity.
Does the SD card store the fingerprint image?
No, only the user ID and timestamp are logged. The actual fingerprint template remains securely in the sensor’s flash memory.
Can I power the system with a USB instead of a battery?
Yes, the Arduino Uno can be powered via USB while programming and running. The 9V battery snap is included for standalone deployment where a USB port isn’t handy.
R307 fingerprint sensor logs attendance with timestamp to SD card and shows name on LCD. Up to 127 users.
What's in this kit
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