D2-6 Line Follower Intelligent Robot Car With Bluetooth Remote Control DIY Kit

Specifications

• Model: D2-6 Intelligent Tracking Car Kit
• Operating Voltage: 3V - 6V DC (Standard 4x AA Batteries recommended)
• Battery type: 1*AA(Not Included)

      Control Modes:

• Mode 1: Infrared Line Following (Autonomous)
• Mode 2: Bluetooth Remote Control (via Android App)

• Microcontroller: Pre-programmed MCU (typically 8051-based architecture for this kit series)
• Motor Drive: Dual DC Gear Motors (1:48 reduction ratio for torque)
• Connectivity: Serial Bluetooth Module (HC-05/HC-06 compatible footprint)
• Sensors: 2x IR Reflex Sensors (Adjustable sensitivity)
• Dimensions: Approx. 100mm x 80mm x 50mm
• PCB Quality: FR-4 Fiber Glass, Green Solder Mask

Applications 

• STEM Education Classrooms: Perfect for teaching logic gates, sensor calibration, and soldering skills.
• Warehouse Robotics Prototype: Understand the fundamental logic used by AGVs (Automated Guided Vehicles) in Amazon warehouses.
• Mobile App Development: Use this platform to test your own custom Bluetooth control apps.

Features:

• Pre-programmed single-chip microcomputer as the core
• Line follower robot, obstacle avoidance, Bluetooth mobile phone control, gravity induction control functions.
• Runs on two powerful DC Motors.
• Operates on 1.5V DC supply. 
• Easy to use & handle.

Project Evolution

Concept: From Soldering Iron to Wireless Commander.

• Past Projects (Prerequisites): If you have practiced with basic soldering kits or built a simple LED chaser, you are ready for this. This kit requires intermediate soldering skills.
• Feature Upgrade: This chassis unlocks Wireless Motor Control. Unlike the basic D2-1, adding Bluetooth allows you to intervene in the robot's path, teaching you the basics of Human-Machine Interface (HMI).
• Effort Level: Intermediate. Expect 1-2 hours of soldering and assembly.
  
  
•  Warning: The electrolytic capacitors and IR LEDs have specific positive (+) and negative (-) legs. Reversing these can cause the components to pop or fail immediately. Check the PCB silkscreen symbols twice!

Package Includes:

• 1 x D2-6 Line Follower Intelligent Robot Car With Bluetooth Remote Control DIY Kit

Frequently Asked Questions (FAQ)

• Does this kit come fully assembled?
  No, this is a DIY (Do-It-Yourself) kit that requires soldering and mechanical assembly.
• What batteries do I need for the D2-6 robot?
  It typically requires 4x AA batteries. We recommend high-capacity alkaline or rechargeable NiMH batteries.
• Is the Bluetooth module included in the kit?
  Yes, the specific Bluetooth module required for remote control is included.
• Do I need to program the chip myself?
  No, the microcontroller provided in the D2-6 kit usually comes pre-programmed with the line following and Bluetooth logic.
• Can I use an Arduino to control this chassis?
  Yes, you can bypass the stock circuit and mount an Arduino Uno or Nano on the chassis for custom programming, though some modification is required.
• How do I control the robot with my phone?
  You will need to download a "Bluetooth Serial Controller" app from the Play Store and configure the buttons to send the correct characters (e.g., 'F' for forward).
• My robot spins in circles during line following. Why?
  This usually means one motor is spinning in the wrong direction or one sensor is not detecting the line. Check motor wiring and sensor height.
• What is the range of the Bluetooth control?
  The typical range is about 10 meters (33 feet) in an open space.
• Can it follow a line on a shiny floor?
  Reflective floors can confuse IR sensors. A matte finish floor with black electrical tape works best.
• Is a soldering iron included?
  No, you must buy a soldering iron and solder wire separately. Check our "Tools" section.
• What is the width of the line it can follow?
  It works best with a black line that is 15mm - 20mm wide (standard electrical tape width).
• Does it support obstacle avoidance?
  Out of the box, the D2-6 is designed for Line Following and Bluetooth. It does not include ultrasonic sensors for obstacle avoidance.
• Can I speed up the motors?
  The speed is determined by the battery voltage (up to 6V) and the motor gearing. You cannot significantly change the speed without changing motors or voltage.
• Is there a schematic available?
  Yes, a basic schematic is usually included in the instruction sheet provided with the kit.
• My Bluetooth module is not pairing. What should I do?
  Ensure the red LED on the module is blinking. If solid, it might already be connected. Try restarting your phone's Bluetooth.
• Are the tires rubber or plastic?
  The wheels come with rubber tires for better grip on smooth surfaces.
• What happens if I connect the battery backwards?
  This kit does not always have reverse polarity protection. Connecting batteries backwards may damage the ICs. Probots Logic-Safe advice: Check polarity twice!
• Is this suitable for a 10-year-old?
  Yes, with adult supervision for soldering. It is a great introduction to electronics.
• Can I use a 9V battery instead of AA?
  Technically yes, but 9V batteries have low mAh capacity and will drain very quickly with motors. 4x AA is superior.
• Where can I find the assembly code/instructions?
  We provide a digital link to the assembly guide and app download in the "Resources" section below.