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45 RPM 12V JOHNSON GEAR HIGH TORQUE GRADE B LOW COST
45 RPM 12V Johnson Gear motor – Grade B low cost, high torque, suitable for robotics, DIY automation, and STEM projects.
45 RPM 12V Johnson Gear High Torque Motor – Grade B (Low Cost) is a budget-friendly DC gear motor designed for applications that require moderate-speed rotation with high torque. Operating at 12V DC with an output speed of 45 RPM, this Grade B motor delivers stable and reliable performance for DIY robotics, automation systems, educational STEM projects, and hobbyist applications.
Though a Grade B motor, it provides good torque and durability, making it suitable for smart vehicles, conveyor systems, heavy-load DIY mechanisms, and other small automation projects. Perfect for students, makers, and hobbyists who want reliable performance on a budget.

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- 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.
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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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