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500 RPM 12V JOHNSON GEAR HIGH TORQUE GRADE B LOW COST
500 RPM 12V Johnson Gear motor – Grade B low cost, high torque, ideal for robotics, DIY automation, and STEM projects.
500 RPM 12V Johnson Gear High Torque Motor – Grade B (Low Cost) is a high-speed, budget-friendly DC gear motor designed for applications that require fast rotation with strong torque. Operating at 12V DC with an output speed of 500 RPM, this Grade B motor delivers smooth, reliable performance for DIY robotics, automation systems, educational STEM projects, and hobbyist applications.
Although a Grade B motor, it maintains good torque, durability, and efficient operation, making it ideal for smart vehicles, conveyor systems, heavy-load DIY mechanisms, and small automation projects. Perfect for students, makers, and hobbyists seeking a cost-effective high-speed, high-torque solution.

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Serial LCD Driver
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)
- 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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