MegBot

thingiverse

This is an affordable MicroBit robot built around the Kitronik Motor Driver Board V2, designed to be easily assembled and used by students at a minimal cost. The complete robot (excluding the MicroBit) should cost approximately £20 or less when purchased in bulk. Robust motors and wheels are both inexpensive and highly accurate, making them ideal for this project. The build process itself takes only a few minutes to complete and can be done without any tools other than a screwdriver for securing the motor points. The code incorporated into this robot enables obstacle avoidance using the Sonar:bit sensor and the Kitronik motor board. Although the Sonar:bit is a somewhat expensive component (£7), it operates at low voltage and requires only three pins, making it a worthwhile investment. A marble caster can be sourced from Thingiverse, with options available from https://www.thingiverse.com/thing:609498 or https://www.thingiverse.com/thing:1408935. Further resources include the Motor Board, which is available at https://www.kitronik.co.uk/5620-motor-driver-board-for-the-bbc-microbit-v2.html, and motors that can be found on Amazon at https://www.amazon.co.uk/Wheel-and-Motor-Assembly-x2/dp/B01E958ZZI/ref=sr_1_2_sspa?keywords=motor+and+wheel&qid=1554287815&s=gateway&sr=8-2-spons&psc=1. Note: When utilizing the Sonar:bit sensor, it is essential to use a low-power version (3v) of the HC-SR04, as the board can only supply power up to 3v.