Summary

Tracking Car for micro:bit
https://buberhu.blogspot.com/2018/12/microbit.html
https://buberhu.blogspot.com/2018/12/microbit_11.html

Layer height：0.1 mm
infill：100%

DC 3V-6V 1:120 TT Gear Motor
L9110S H Bridge Stepper Motor Dual DC Driver Controller Module
Expansion Board For BBC Micro: bit Development Module Contains Buzzer
Infrared Detection Tracking Sensor Module
Robot Chassis Universal Wheels
M2x6 Self Tapping Screw

Print Settings

Rafts:

                                            <p class="detail-setting supports"><strong>Supports: </strong>                     <div><p>No</p></div></p>

Custom Section

                <p class="detail-video"><iframe src="//www.youtube.com/embed/msNkEfZ_-BY" frameborder="0" allowfullscreen></iframe></p>            <p class="detail-video"><iframe src="//www.youtube.com/embed/2TgtWXrdGaE" frameborder="0" allowfullscreen></iframe></p>            <p class="detail-image"><img src="https://cdn.thingiverse.com/assets/90/b5/bc/6a/f6/A4_3x3_9%E5%BC%B5.png"></p>            <p class="detail-caption"><strong>3x3_A4</strong></p>

micro:bit Tracking Car