Keep your ideas safe and secure with this biometric diary locker

If you want to keep your personal thoughts and ideas to yourself, here’s a diary locker from TechKiwiGadgets that opens with your personal fingerprint.

As shown in the demo video, this Arduino-based device can house a small notebook and even a smartphone, and locks with the press of a button. When you need your secured materials, you simply insert your finger into the fingerprint reader, and the small servo inside moves to allow access.

An infrared sensor is also implemented to make sure the door is closed, and a series of programmable LEDs toward the bottom provide visible user feedback. If you’d like to build your own, code and instructions are available here, and the needed 3D print files can be found on Thingiverse.