Model D21 Intelligent Tracking Line Smart Car Kit A compact DIY electronic kit for building a TT motor driven line following and patrol robot. Designed for hobbyists, students, and makers who want a practical, handson project to learn electronics, motor control, and sensor integration. Key benefits Teaches core robotics skills: assemble the chassis, connect TT motors, wire sensors, and configure control logic to learn practical electronics and programming. Ready for handson testing: intended for line following and patrol tasks so you can move quickly from build to real world trial. Modular and expandable: uses standard TT motor mounting and common connector layouts to add sensors or substitute control boards as needs grow. What it does and how it solves problems Line tracking function: built to follow marked paths reliably, solving the need for a repeatable, lowcost platform for path following demonstrations and experiments. Smart patrol capability: supports routines to patrol preset routes, enabling simple automation and demonstration of autonomous behavior for projects and teaching. TT motor drive: provides straightforward, proven drive performance for small robotics projects, simplifying motor selection and mechanical design. Core attributes Function: Line tracking and smart patrol in a DIY electronic kit format suitable for assembly and . Drive type: TT motor based drive system for reliable, low speed torque suited to small mobile platforms. Compatibility: Works with standard TT motor mounts and common hobby control boards and sensor modules, allowing integration with many educational microcontrollers and motor drivers. Construction: Compact kit format that assembles into a small mobile chassis suitable for tabletop testing and classroom use. Performance: Designed for stable line following and basic patrol behavior under typical indoor conditions. Typical use scenarios Classroom STEM project: Students assemble the D21 kit, learn wiring and sensor use, and program a controller to make the car follow lines and patrol a course. Hobby prototyping: Use the kit as a base platform to test control algorithms, add additional sensors, or prototype features before scaling up to larger robots. Demonstration and competition practice: Build a reliable line following robot to practice route planning and tuning for small robotics contests or inclass demonstrations. What you receive and who it is for A complete DIY kit that assembles into an intelligent tracking line smart car driven by TT motors. Ideal for beginners with basic soldering or wiring skills, educators designing handson lessons, and makers who want a compact, modifiable platform for robotics experiments. Why choose this kit Focused on practical learning and rapid testing of line tracking and patrol functions, the D21 kit offers a straightforward, modular foundation for education and hobby robotics projects without unnecessary complexity.