Easy and fun to assemble. The detection module can be replaced if desired without needing to change the device's basic structure.

• The logic is based on the PIC16F630 (DIP14) microcontroller
  • programming connector on the top board
  • the code of the preprogrammed chip is protected
  • red LEDs indicate operation
• Obstacle detection is done with three infrared LED pairs placed on a separate board
  • common IR power adjustment
  • separate sensitivity adjustment for each pair
  • reports detected obstacles with a named signal "voltage level"
• two DC motors with gearbox and large wheels
  • 68 mm wheels with rubber coating
  • mounted directly to the right-angle gearbox behind the motor
• operates on 4x AA batteries (battery holders are under the base plate)