A robot build, powered by raspberry pi. I used 2 L298N motor drivers, 4x200rpm n20 motors, a 2S model airplane lipo and a battery management system with controlled by an ATtiny. It can be run over a bluetooth Xbox controller, or over wifi. It has a raspberry pi camera attached to a servo on the front, and broadcasts it to a webpage.
If you want to make this, it relatively straightforward, and makes for a good robotics test platform.
Special thanks to Jonah_Innoart for designing the mecanum wheels
The code for running this is here: GitHub
You need to build JInput from source on the Pi using maven and install the shared libraries in order for this to work.