This is a project I've been working on for a while.
It's supposed to be a robot remote control. I have had it working as a remote but currently it's in the middle of an upgrade so it doesn't really control anything yet.
As you can see it uses a PlayStation 2 controller as one of the input devices. There's an enclosure strapped to the front of the controller.
Here's a side view to give you an idea of how the two main parts join together.