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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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TB6560 4 Axis Cnc Controller 4 Axis Stepper Motor Driver DSP Controlled 3.5A 24V
- Rated maximum output: ± 4.5A, 40V, Peak 5A, low output impedance, source 0.5?,
- the receiving end of 0.4?, low voltage shutdown, thermal parking and circulation.
- circuit protection. After I design, you can set the current output of 0.5A 1A 1.8A 2.5A.
- 3.3A 4A 4.5A to accommodate more and different motor Current.
- The drive is suitable software mach2, mach3, (mach3 have support WIN7 system), KCAM4 like.
Text to Speech TTL Module (Serial to Speech)
-  Single row 0.1″ header for easy connection to a host system
- Power requirements: +5 VDC
- 30 mA idle
- 46-220 mA active (depending on speech parameters and output load)
- Â Communication: Asynchronous 9600 bps serial (8N1)
- 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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 Voice effect optimization
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 Module miniaturization and easy integration
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Dimension: 33*27.5mm
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With mounting holes

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