Mouse Droid is the common name for MSE-6, a small robot in the original Star Wars Film that looks a bit like a toaster on wheels. Sabine Wren is a character from the show Star Wars Rebels who is a prolific graffiti artist.
All caught up? Great.
Cass (the Canadian creator behind Chaos Theory) is clearly a fan of both eras of the franchise, and wasn’t afraid to ask the important questions. What if an Imperial Mouse Droid got a Sabine Wren makeover?
Finding out the hard way, she built an open-source, fully autonomous, 3D-printed droid that abandoned its imperial duties to become a graffiti-covered rebel rave machine.
It was a labor of love. It wasn’t enough to build a new shell around an existing vehicle. Cass’s droid had to navigate completely autonomously. And reacts with a panic mode. And have a party button.
The brains in this case are an Arduino UNO, with a DFPlayer Mini MP3 on audio. Feeling around is brought to you by an ultrasonic distance sensor. And since these are not parts that typically come on a stock car, it made more sense to build one from scratch.
It is largely a custom chassis that I designed and 3D printed, although I used an existing flat metal Mecanum chassis underneath purely as a structural mounting point for the motors. It gave me something sturdy to screw the engines onto while I developed the rest of the chassis. If I were to build a version 2, I would probably eliminate the Mecanum support completely and mount the motors directly with brackets attached with heat set inserts.
There is also a nice practical benefit to designing everything yourself: it makes the project much more replicable. Someone else with a 3D printer can take the files and build their own version without having to track down a particular RC car or adapt an existing platform to fit.
And, honestly, there’s also a less than practical reason: I just really enjoy building things from scratch! I enjoy pushing my skills wherever I can. This was my first challenge using heat set inserts to attach components to 3D prints, and I’m really happy with how well they worked in this case.
If that’s not a good enough reason to build something, I don’t know what is.
See how to build your own on Instructables.