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DIY 15 Mechanical Password Box STEM Education kit
DIY 15 Mechanical Password Box STEM kit for students and hobbyists to learn mechanics, gears, and hands-on engineering.
The DIY 15 Mechanical Password Box STEM Education Kit is an engaging hands-on project designed for students, hobbyists, and STEM enthusiasts to explore mechanics, problem-solving, and engineering design. This kit allows you to build a mechanical password-protected box, teaching principles of gear systems, levers, and lock mechanisms.
Featuring easy-to-assemble components and clear instructions, it promotes critical thinking, creativity, and practical engineering skills. Ideal for STEM education, classroom experiments, and DIY engineering projects, this kit provides a fun and interactive way to learn mechanical design and secure system concepts.

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- Limit switches:Â 6
- Micro-stepping:Â 1/16
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- Uses removable Pololu A4988 compatible stepper drivers. (A4988, DRV8825, and others) (Not Included)
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- Runs on 12-36V DC. (At the moment only the Pololu DRV8825 drivers can handle up to 36V so please consider the operation voltage when powering the board.)
- Please note that this is an unassembled kit and needs soldering.
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- Microcontroller: ATmega168 or ATmega328V
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- Analog Input Channels: 6
- DC Current per I/O Pin: 40 mA
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- Power requirements: +5 VDC
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- Dimensions: 1.25″x1.5″x0.37″
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Text support rate is better
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 Interface operation is simpler
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5V single power supply.
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Output directly connected to the speaker, can drive 4 ohms 3W / 8 ohm 2W speakers
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Busy status output, can be connected to the microcontroller IO or indicator light, no need to be left floating.
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