USB paddle game controller

These are USB paddle game controllers for old games, akin to the Atari 2600 paddles. By default, these function like a [Stelladaptor](http://www.grandideastudio.com/stelladaptor-2600) with a pair of paddles plugged in, so this should be supported in emulators like Stella and Z26.

Full project instructions are [here](https://www.instructables.com/id/USB-Paddle-Game-Controller).

You will need to print the top and bottom segments, the knob, and the converter box (main and lid; you can choose a lid with or without space for four extra 6mm tactile buttons). The converter box can handle two paddles. If your switches didn't come with caps or you don't like the caps they came with (mine came with caps that were high and wobbly) you can print button caps. And if you want you can print "1" and "2" labels for the two paddles.

The controller works with the [DICE emulator](https://sourceforge.net/projects/dice/)'s Pong if you set the controls correctly. And you can also play with my modera