Build a Keypad Safe Lock with Tamper Detection and Alarm – Advanced 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.

You’ll build a fully functional electronic safe lock that reads a 4x4 keypad, drives a solenoid to unlock a door or drawer, and actively defends against brute-force attacks. After three wrong PIN attempts, a piercing alarm sounds and the system locks out for a predetermined time—just like real-world security panels. This kit turns a theoretical security concept into a practical, deployable device.

What You'll Build

By the end of this build, you’ll have a working safe lock with a 16x2 LCD status display, keypad input, and solenoid actuator. It can secure a study drawer, hostel locker, or prototype security door. The lockout counter and alarm add layers of real-world tamper protection, demonstrating exactly how commercial systems prevent unauthorized access.

What You'll Learn

• Program a 4x4 matrix keypad for PIN entry and validation
• Interface and control a 5V solenoid lock via relay with flyback diode protection
• Implement a brute-force lockout counter and timed reset using Arduino logic
• Integrate an active buzzer and LCD for real-time status and alarm feedback

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

This advanced kit is built for engineering undergraduates (B.Tech ECE, EEE, CS) tackling security-focused projects, Smart India Hackathon teams prototyping access control solutions, and ATL lab mentors demonstrating industrial automation concepts. If you’ve completed basic Arduino projects and want to master real-world logic like lockout timers and alarm triggers, this kit bridges the gap between classroom theory and deployed systems.

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.