Music Safe Box

Difficulty: ****

Learning Focus: Dual servo control, assembling safe box opening/closing mechanisms and locking mechanisms, and basic A/B button passcode programming and decryption techniques.

By controlling servo angles, the linkage mechanism drives the opening and closing action of the safe. A second servo functions as the safe lock. Once the safe is closed, entering the correct combination of A and B buttons programmed into the system will unlock it. Built-in Micro:bit LED matrix displays and audio prompts enhance both practical usability and interactive fun.