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1203B PWM DC Motor Speed Regulator
1203B PWM DC Motor Speed Regulator – Efficiently controls DC motor speed with smooth PWM adjustment, high torque at low speeds, and easy installation for DIY, robotics, and automation projects.
1203B PWM DC Motor Speed Regulator
The 1203B PWM DC Motor Speed Regulator is a compact and efficient controller designed to precisely adjust the speed of DC motors. Using Pulse Width Modulation (PWM) technology, it delivers smooth speed control while maintaining high torque at low speeds and minimizing power loss.
This regulator supports a wide voltage range, making it suitable for DIY projects, robotics, automation systems, and educational applications. The onboard potentiometer allows easy manual speed adjustment, while its durable build ensures stable and long-lasting performance.
Key Features:
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PWM technology for smooth and efficient speed control
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Wide DC voltage input support
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High torque output even at low speeds
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Easy speed adjustment via built-in knob
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Compact design for easy installation
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Low heat generation and energy-efficient operation
Applications:
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DC motor speed control
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Robotics and automation projects
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DIY electronics and hobby projects
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Educational and training kits

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Mini Portable Virtual Laser Projection Keyboard and Mouse Wireless Bluetooth
- Compatible with Android, iOS, Windows and Mac all kinds of operation systems that can be used with any phone, tablet, PC and laptop for a smooth and fast way of text input.
- Built-in Bluetooth for connecting to other devices without complex wired troubles
- More stable and smarter
- Can change the mini USB port to micro USB port.
- With mini Bluetooth speakers, which support voice reporting and music playing
- 3 in 1 Function: Laser keyboard,Mouse and bluetooth speaker
- Good touch sensitivity
- The BEEP sound and brightness can be adjusted on the laser keyboard
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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