DPDT "double pole - double throw"
switch can be used for reversing polarity. All though this method may be a bit crude, it works great for changing the direction of a motor – analog style. This could be used for Controlling motors for robots, animatronics and Halloween decorations to name just a few helpful ideas! See the last Step for Pictures of the great robot battle, controlled from this very switch!
Now their have been great Instructables on this all ready such as this one, by Troy (Firgelli Automations) and his Instructable, HOW TO: Wire a DPDT rocker switch for reversing polarity found here:
But I don't think many have covered the idea of actually producing the switch itself, at least on such a scale. The photos below will show you how. Mine was used to control a large fighting robot I built for another Instructable found below.
I wanted Lil' Timmy to have a tank style feel to the controls, since it did have tank steering. Controlling it from little radio shack style DPDT switches just wouldn't cut it. I wanted these switches to have some heft to them, something I could slam hard when making turns. So i searched the internet and aside from some industrial switches nothing came close. The purchased ones were astronomical in price and even then didn't really have the heft I was looking for. So when something doesn't exist, make it it exist. Not that hard actually, with a few simple variations anyone can make it.