DIY Project: Fingerprint-Activated Security Box

Details

Design Concept

Tired of worrying about privacy when storing personal items?

This fingerprint-activated security box solves it!

Using biometric authentication, only authorized users can unlock it—perfect for safeguarding kids’ treasures like secret notes or stickers.

Why Fingerprint?

Unique Identification: Eliminates traditional lock complexity.
Instant Access: Kids love the futuristic “magic touch” to open their private space.

Hardware Setup

Core Components

Main Controller: Ai-M61-32SU development board (coordinates fingerprint

recognition and servo control).

Fingerprint Module: FPM383C for instant biometric scanning.

Lock Mechanism: 9g servo motor (compact, reliable torque for precise latch

control).

Prototyping Challenges

Planned a 3D-printed enclosure but improvised with a sturdy shoebox (flexible, eco-friendly, and surprisingly stylish!).

How It Works

Authentication: Place a registered finger on the FPM383C module.

✅ Green LED: Unlock successful → Servo opens the latch.

❌ Red LED: Unauthorized access → Servo locks immediately.

Code Snippet

#include "FPM383C.h"
#include "bflb_servo.h"
#include "bflb_gpio.h"
void main() {
// Initialize fingerprint module & servo
FPM383C_Init();
servo_init();
while(1) {
// Check fingerprint match
if (FPM383C_Verify()) {
servo_unlock(); // Rotate servo to open
set_led(GREEN);
} else {
servo_lock();
// Rotate servo to close
set_led(RED);
}
}
}