Two-Factor RFID plus PIN Lock Kit with Arduino Uno + Relay
Build a Two-Factor RFID + PIN Security Lock with Arduino Uno — Advanced Multi-Factor Access Control Kit
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 locking your lab, hostel room, or project cabinet with a system that demands both an RFID card and a 4-digit PIN — only the right combination triggers the solenoid. In an era of single-point security failures, this advanced kit teaches you how to layer hardware-level authentication. Ideal for final-year engineering projects, Smart India Hackathon prototypes, or building your own portfolio of embedded security systems.
What You'll Build
A fully functional two-factor door lock mechanism. An RFID reader checks the card's UID; if valid, the 0.96-inch OLED prompts for a 4-digit PIN via the membrane keypad. Only when both factors match does the relay energize the solenoid lock. A DS3231 real-time clock stamps access events onto a microSD card — a mini audit trail. This isn't a toy; it's a deployable prototype for lab doors or equipment cases.
What You'll Learn
- Multi-factor authentication logic: sequencing RFID verification with PIN entry using nested control flows
- Integrating SPI devices (MFRC522, OLED) and I2C (DS3231) on the same Arduino Uno
- Driving a 5V solenoid lock safely using a relay and flyback diode to prevent back-EMF damage
- Implementing time-stamped access logging with microSD storage for audit applications
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| MFRC522 RFID module | 1 |
| 4x4 Membrane Keypad | 1 |
| RFID Cards | 5 |
| 5V Solenoid Lock | 1 |
| 5V Relay Module | 1 |
| 0.96-inch OLED display | 1 |
| Active Buzzer | 1 |
| DS3231 RTC module | 1 |
| MicroSD Card Module | 1 |
| 1N4007 Diode | 5 |
| 10kΩ Resistor | 5 |
| 220Ω Resistor | 5 |
| PCB Prototype Board | 2 |
| Male-Male Jumper Wires | 25 |
| 12V Power Adapter | 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
Engineering students pursuing B.Tech in ECE, EEE, or Computer Science who need a capstone-level security project. Perfect for Smart India Hackathon teams tackling surveillance or access control problem statements. Also suitable for IIT, NIT, VIT, BITS Pilani, and state university labs where embedded systems projects must demonstrate real-world application. ATL Tinkering Lab facilitators can adapt it for advanced student groups. If you've already completed basic Arduino tutorials and want to tackle multi-sensor coordination, this is your next challenge.
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 box to activate your AI companion. It gives step-by-step guidance specific to this kit, and you can reach out on WhatsApp for human assistance if the wiring gets confusing.
Can I add biometric fingerprint as a third factor?
Yes, after mastering this kit, you can interface a fingerprint sensor like R307 over UART. The power supplies and logic flow you'll learn here make expansion straightforward.
Is the solenoid lock strong enough for a real door?
The included 5V solenoid is rated for cabinets, lockers, and light-duty doors. For main doors, use the same circuit with a 12V solenoid and a suitable external power supply.
Does the kit include a microSD card for logging?
The microSD module is included, but the microSD card itself is not. A 16GB or smaller FAT32-formatted card works best.
MFRC522 RFID card required PLUS 4-digit PIN on keypad. Both must match for access. Teaches multi-factor logic.
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.
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