I'd like to present to you my first fully designed robot.

Self-balancing robot for fun is capable of:

• actually, to balance; :)
• to ride and turn;
• to deviate from obstacles using distance sensors;
• all of it are controlled through an access point distributed by the robot itself, which acts, among other things, as a web server, issuing a control page to a standard browser upon request.

Main parts

• esp8266 NodeMCU v3;
• motor driver l298n;
• yellow single-axis arduino TT-geared motors;
• 2x 18650 batteries and battery compartment;
• MPU6050;
• SSD1306 128x64 I2C display;
• 2x HC-SR04 dictance sensors;
• toggle switch KCD1-11;
• breadboard 4x6 см (if you'd like);
• body parts (current stl files).

Fasteners (length in millimeters):
- Stud M6x300 x2;
- Wing nut DIN315 M6 x4;
- Flat washer M6 x4;
- Screw DIN7985 M3x35 x4;
- Screw DIN7985 M3x16 x8;
- Hexagon nut DIN934 M3x0.5 x12;
- Self-tapping screw DIN7982 3.5x32 x4;
- Self-tapping screw DIN7982 3.5x9.5 x2;
- Self-tapping screw DIN7982 2.2x9.5 x28;

- Self-tapping screw DIN7981 2.2x9.5 x4;
- Self-tapping screw DIN7981 2.9x9.5 x4;

Assembly (en sub): https://youtu.be/ZRSPSNteWiU
Code: https://github.com/TrashRobotics/BalancingRobot

Designed for PLA.

List of parts required for printing:
- base.stl x1;
- motor_cover.stl x2;
- top_cover.stl x1;
- side_cover.stl x2;
- spacer.stl x4;
- crossbar.stl x2;
- wheel.stl x2;
- protective_limiter.stl x2;
- hc_sr04_holder.stl x2;
- hc_sr04_stand.stl x1;
- display_holder.stl x1;
- display_stand.stl x1;

You must print parts in the same positions as in picture 5.
If base.stl doesn't fit into the printer's workspace, then it can be placed diagonally, rotated around the z-axis by 45 degrees.
Some parts require support.

Nozzle - 0.4mm.
Layer height - 0.2mm.
Speed and Infill should be chosen as you see fit.