How do the rotating / turnable joysticks interface?

[retrometro]

I think I read from one of the threads that since they're digital they just provide two microswitch inputs?

[Havok]

You get something like this:

http://groovygamegear.com/webstore/index.php?main_page=product_info&cPath=76_81&products_id=304

[u_rebelscum]

I think I read from one of the threads that since they're digital they just provide two microswitch inputs?

To expand on what Havok said, the mechanical rotary sticks have 12 switches, one for each rotation position of the stick.  The rotary encoder card Havok linked converts the 12 switches to two signals, left and right.

[Ummon]

Bad title. I thought he was meaning like the Mag-stick or Prodigy.

[u_rebelscum]

Oh, I forgot to mention the optical rotary sticks.  Less common in the arcades, but happs sells both a mechanical and an optical rotary stick.  The optical interfaces like a spinner.