RC Robotics Starter Kit

This design is simply a radio controlled robotics starter kit. Except for the chassis, the other STL and OpenSCAD files are from other more general designs I have already posted online (but dropped here for convenience). What I have put together here for fun (for the grand kids of course) can be best described as the Easter Bunny meets Monty Python meets BattleBots.

See also my related RC Car design at https://www.thingiverse.com/thing:7328990, which uses a servo for front wheel steering.

The printed parts include:

Chassis, which you may choose to modify or replace to suit your needs
Two motor mounts, you may need to configure for specific motors
Two 20mm radius wheels and tires to connect to the motor shafts
Two 10mm radius wheels and tires for front and back
Two wheel mounts for front and back wheels
Mounting brackets that screw onto chassis to hold things, depending on your needs and you might design your own
(optional) a gear or something to attach to a servo to do who knows what

It is intended that the electronics are for 2.4GHz ELRS radio control. See PDF wiring diagram. Shown here are the non-printed parts:

Two brushed DC motors (depending on the diameter, you may need to adjust the size of the motor mounts)
7.4 volt rechargeable battery (e.g. Blomiky 450mAh with a USB charger)
Radiomaster ER4 2.4GHz receiver (has WiFi for configuration and firmware updates)
Two mini brushed 20A RC ESC speed controllers
One micro servo motor (e.g. Mizuei MG905, optional)
On/off toggle switch
Various M3 bolts and lock nuts
Wires (recommend Dupont cables with M and F ends, makes wiring and reconfiguration much easier)
Solder and heat shrink tubing and/or tape

You can print all of the parts with PLA, PLA+, PETG or PETG+, except for tires which should be printed with TPU.

You can adapt this basic design to suit your needs, noting that the OpenSCAD files provided give you a lot of flexibility for configuring and printing wheels, tires, motor mounts and gears that would meet your specific needs using the OpenSCAD Customizer window.

I glued the rabbit on top of a gear connected to a servo just for fun (it can turn it left or right). You would more likely do something else using servos or relays. Using the ER4, there are two channels that I use for the motors where it drives like a tanks and does great spins. That leaves two channels for other (maybe fun) stuff.

I use a RadioMaster Pocket 2.4MHz controller, which supports EdgeTX.