Smart Lockbox with PIN History & Audit Trail — Arduino 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 lockbox that does more than just lock—it records every access with a timestamp, creating a complete audit trail. This kit guides you through building exactly that: a PIN‑protected security system where a 4x4 keypad controls a servo lock and the last 10 access attempts are logged in EEPROM. Designed for students who want to understand how real‑world access control works, the project combines input validation, time‑stamped logging, and physical actuation into one satisfying build.

What You'll Build

You’ll assemble a working smart lockbox prototype. A correct PIN entered on the keypad swings the servo motor to unlock the box, while an LCD shows access status in real time. Every successful and incorrect attempt is recorded with date and time from the DS3231 RTC, stored in the Arduino’s EEPROM. The result is a device that can tell you exactly who (or which PIN) was used and when—perfect for securing personal items or demonstrating an audit‑ready security system.

What You'll Learn

• Interfacing a 4x4 matrix keypad and implementing multi‑digit PIN verification
• Reading and writing non‑volatile EEPROM to store access logs that survive power loss
• Using a DS3231 real‑time clock module to timestamp every event accurately
• Controlling a servo motor, displaying messages on an I2C LCD, and triggering a buzzer for feedback

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

CBSE Class 11–12 students pursuing computer science or electronics will find this project directly relevant to curriculum topics like embedded systems and data logging. B.Tech ECE/EEE first‑year students can use it for mini‑projects or hackathon prototypes, including Smart India Hackathon ideas around security. ATL Tinkering Labs and hobbyist makerspaces will appreciate the guided build that combines hardware, coding, and real‑world audit concepts.

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.