2A resettable fuse protects the controller from overcurrent and short circuits. Potentiometer with an integrated switch provides easy speed adjustment and simple power control. 1803BK DC Motor Speed Regulator controls motor speed by adjusting PulseWidthModulated PWM signals, delivering precise and smooth speed changes. Input power range is DC 1.815V, enabling use with a wide range of DC motors and compatible power sources. Benefits and features at a glance Safe operation: builtin 2A resettable fuse protects the controller during power surges or faults. Precise speed control: PWMbased regulation delivers smooth speed changes and better motor performance. Easy to use: potentiometer with switch for quick on/off and speed adjustment in one control. Broad compatibility: supports DC motors powered by 1.8 to 15 volts, useful for many hobby and project applications. 23 practical use scenarios Educational robotics: integrate with small DC motors to demonstrate PWM speed control, learning current protection and control interfaces. Hobby projects and models: adjust motor speed for DIY cars, robots, conveyors, or fan applications using a compact regulator. Prototyping and testing: use in development setups to test motor response to variable voltage and PWM without modifying the motor or power supply. Specification highlights Model: 1803BK DC Motor Speed Regulator Control method: PulseWidth Modulation (PWM) Input voltage: DC 1.815V Protection: 2A resettable fuse Control interface: Potentiometer with switch function This description preserves the original model and functions while presenting clear, customerfocused benefits, practical applications, and key specifications in plain, readable language.