LOTHYE D2-5 DIY Line Tracking Smart Robot Car Kit for STEM
LOTHYE D2-5 DIY Line Tracking Smart Robot Car Kit for STEM
LOTHYE D2-5 DIY Intelligent Line-Tracking Robot Car Kit
Build your own intelligent, self-navigating robot car from scratch with the LOTHYE D2-5 DIY Tracking Trolley Kit! Designed for electronics enthusiasts, students, and educators, this hands-on kit teaches fundamental concepts in circuits, mechanical assembly, and automated control systems — all in one exciting project.
⚠️ Important Before Purchase: This kit is intended for buyers who have prior experience with circuit soldering and assembly. While all components are verified in good condition before dispatch, successful assembly depends on the builder's skill level. Batteries are NOT included.
What Does It Do?
The D2-5 intelligently follows a black line on a white surface using a clever photoresistor-based optical sensing system. Red LEDs emit light onto the ground; the reflected light is read by photoresistors to detect whether the car is on the black track or the white field. When the car drifts off the line, the corresponding motor slows or stops and the car steers itself back — fully automatically, no remote control needed!
Key Features
- 🚗 Automatic Line-Tracking: Follows a 16 mm wide black runway on any white surface, no matter how it curves or bends
- 💡 Optical Sensing: Uses red LEDs + photoresistors for real-time ground detection and course correction
- ⚙️ Expandable Platform: Serves as a hardware base for advanced projects — obstacle-avoidance robots, fire-fighting robots, soccer robots, and remote-control cars
- 🎓 STEM Education Ready: Ideal for schools, maker labs, and engineering courses as a vivid, practical electronics experiment
- 🔧 Full DIY Assembly: Includes PCB, motors, acrylic wheels, silicone tires, resistors, transistors, LEDs, capacitors, and more
- 📐 Compact PCB Size: 73 × 105 mm board — perfectly sized for a desktop build
Specifications
| Kit Model | D2-5 Intelligent Tracking Trolley Kit |
| Power Supply | 3V DC (2 × AA batteries — not included) |
| PCB Size | 73 × 105 mm |
| Sensing Method | Photoresistor + Red LED optical reflection |
| Condition | New |
| Origin | Made in Mainland China |
Assembly Overview (4 Steps)
- Circuit Soldering: Solder all resistors, transistors, LEDs, and capacitors following low-to-high component height order. Verify resistor values with a multimeter. Observe polarity on all polarised components.
- Mechanical Assembly: Attach the gimbal screw and nut, mount the battery box with double-sided adhesive, assemble the three-piece acrylic wheels (remove protective film first), fit silicone tires, and secure motors.
- Photoelectric Circuit Installation: Mount the photoresistors and LEDs (observe polarity) in reverse on the PCB approximately 5 mm from the ground and 5 mm apart from each other.
- Full Car Debugging: Install 2 AA batteries, power on, and confirm the car drives forward (toward the universal wheel). Adjust motor wiring if direction is incorrect.
Who Is This For?
This kit is perfect for electronics students, hobbyist makers, robotics club members, and STEM teachers looking for an engaging, real-world project. It covers mechanical structure, basic electronic circuits, and automated control — all at once.
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Frequently Asked Questions
Q: Does the LOTHYE D2-5 smart robot car kit include batteries?
A: No, batteries are not included. The kit requires 2 × AA batteries (3V DC) to operate. Please have these ready before beginning the final assembly and testing step.
Q: Is this line-tracking robot car kit suitable for beginners with no soldering experience?
A: This DIY kit is recommended for buyers who already have some basic circuit soldering experience. While the soldering steps are clearly outlined, novice builders may find it challenging. It is best suited for electronics students, hobbyists, and educators with a foundational understanding of circuits.
Q: Can the D2-5 kit be extended to build other types of robots?
A: Yes! The D2-5 board is a versatile hardware platform. With additional control circuits, it can be adapted for obstacle-avoidance robots, fire-fighting robots, soccer robots, and remote-control car projects — making it an excellent ongoing learning tool.
Q: What track surface does the line-tracking car work on?
A: The car is designed to follow a 16 mm wide black line on a white background. It uses red LED and photoresistor-based optical sensing to detect the contrast between black and white surfaces, automatically steering itself to stay on the track.