Basic Robotic Car. (OK, the name really comes from designing the wheels so that you can use supermarket broccoli-bunch rubber bands for tires.)


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A simple but fairly capable robotic vehicle, intended to be built mostly from stuff that people already have lying around. One gearmotor, one servo that doubles for steering and building a map of obstacles in front of the bot. Designed for 3D printing on a 100x100mm build platform. In Openscad, so you can modify to fit your own parts if necessary. (You will need to put the servo-arm and round-corner cube files in your openscad library folder if you don't already have them.)

Basic software (with pinouts for Teensy 2.0) is currently available at (broc1-broc4).

Materials and methods

- PLA or ABS or your favorite other filament
- small breadboardable Arduino-compatible controller (Teensy, Trinket Pro etc)
- half-size solderless breadboard (preferably with two power rails and adhesive bottom)
- L293D motor driver chip or equivalent
- two-shaft gearmotor
- micro servo
- ultrasonic rangefinder
- axle and wheels
- small USB charger or 6.6/7.4vLiPo battery
- 7805 voltage regulator (if using LiPo)
- IR remote control receiver (optional)
- slotted optical interrupter (optional)
- rubber bands or tires
- zip ties
- jumper wires



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Mini lunamoth4rp10007 published this design ago