Onboard MCU generates resolution PWM signals with precise control, enabling accurate steering gear positioning and smooth motor response. Modes: manual mode and modes, switchable by a button, with a mode indicator to show the current mode. Manual mode control: knob adjustment or serial port commands for flexible integration with external controllers or software. Steering gear control accuracy: 0.09 degrees, i.e., the minimum PWM change is 1 microsecond, delivering fine resolution and repeatable motion. Benefits and performance: precision, predictable behavior, easy mode switching, and multiple control paths that fit standard PWM based steering gear systems. Compatibility and integration: designed to work with standard PWM based steering gear configurations; supports external serial control. Use scenarios: RC robotics or hobbyist projects requiring precise joint or steering motion for arms, gimbals, or steering links. Automated test benches needing programmable PWM to simulate steering input and validate control algorithms. Prototyping and educational platforms for vehicle steering experiments with manual override and clear mode indication.