Since the box is battery powered, [Mike] has added an extremely clever fail safe mechanism. The 9V battery inside includes two extra contacts to the outside of the box via small screws.

Focus Box Focus Box is a simple project designed to help users minimize distractions by physically locking away their phones for a set period of time. The box is crafted from wood and equipped with an ...

The 3D printed case also makes it easy to incorporate additional features, such as compartments for different items or even a secondary locking mechanism. Watch this video on YouTube.

Once the box is unlocked, the user may update the passwords, combinations, and fingerprints that must be provided to unlock the box again. Watch this video on YouTube. Source: Bruce Land ...