Smart Lock with Access Log
Build Your Own Dual-Factor Smart Lock with RFID, Keypad & Access Log – Arduino Project 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 a lock that only opens when you present the right RFID card and enter a secret PIN – while silently recording every attempt with a precise timestamp. This kit transforms that idea into a working prototype you can mount on a room door, locker, or college project setup. You’ll wire an Arduino Uno to an MFRC522 RFID reader, a 4x4 keypad, and a relay that fires a solenoid strike, all while an OLED display provides instant feedback and a microSD card stores a complete access log powered by a DS3231 real-time clock.
What You'll Build
A dual-factor access control system that unlocks only when a pre-authorized RFID card is scanned followed by the correct 4-digit PIN. Every access event – granted or denied – gets written to the SD card with date and time. The OLED shows status messages like “Access Granted” or “Wrong PIN,” and the relay drives an electromagnetic lock. You’ll have a fully functional model that demonstrates the logic behind commercial smart locks.
What You'll Learn
- SPI communication to read and write RFID tags using the MFRC522 module
- Matrix keypad scanning and password validation logic
- DS3231 RTC interfacing to generate accurate timestamps for SD card event logs
- Driving a relay with back-EMF protection using 1N4007 diodes to control high-current locks
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| MFRC522 RFID Module | 1 |
| 4x4 Matrix Keypad | 1 |
| RFID Cards (13.56 MHz) | 5 |
| 5V Relay Module | 1 |
| DS3231 Real-Time Clock Module | 1 |
| MicroSD Card Module | 1 |
| 0.96-inch OLED Display (I2C) | 1 |
| 1N4007 Diode | 5 |
| 10kΩ Resistor | 5 |
| 100nF Ceramic Capacitor | 5 |
| 830-point Breadboard | 1 |
| Male-to-Male Jumper Wires | 25 |
| 9V Battery Snap Connector | 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
CBSE Class 11–12 students who want a standout computer science or physics project, first-year B.Tech ECE/EEE students learning embedded systems, and ATL Tinkering Lab members who need a functional security prototype. It’s equally ideal for Smart India Hackathon participants and hobbyists at IIT/NIT/VIT/BITS Pilani who want to understand two-factor access control.
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 inside the box to open the AI build companion — it guides you through wiring, code upload, and debugging. For trickier problems, ping us on WhatsApp for direct human support.
Can I use my own RFID tags instead of the included cards?
Yes, any 13.56 MHz MIFARE Classic tag works seamlessly with the MFRC522 module. You can even clone the included cards using the same reader.
Is any programming experience needed?
Basic familiarity with the Arduino IDE helps, but the code is fully commented and the build companion explains each sketch section. You’ll only need to upload the pre-written program.
Can this lock a real door?
The 5V relay can switch loads up to 10A, so you can wire an external 12V electromagnetic lock or solenoid strike. The included 1N4007 diodes protect the circuit from back-EMF spikes.
MFRC522 and keypad dual factor unlock solenoid. Events logged to SD with RTC timestamp.
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