Fingerprint Secure Box

Here's a tutorial on how to make a fingerprint sensor-secure lock box.

Step 1: Parts List

• Arduino compatible microcontroller. For mine, however, I used an Arduino Micro.

• Fingerprint Sensor

• Lighted Button

• 12v Power Adapter

• Solenoid

• Diode

• MOSFET Transistor

• Panel Mount 12v Power Jack

• Any type of box

• Long Breadboard

• Adhesive

• Screws, drills, jumper cables, electrical tape etc.

Step 2: Circuit Layout

The transistor acts as a switch for the solenoid and because the solenoid requires 12 volts, the diode helps make sure that back current doesn't fry the Arduino.

Solenoid: Pin 2

The light for the button: Pin 3

The input and output for the finger print sensor: Pins 11 and 12

Step 3: Code

This is the sketch that will run the whole circuit.

In order to add fingerprints, the library given with the sensor has an example called "enroll" which you can use to enroll fingerprints onto the sensor.

Step 4: Assembly and Testing