I'm trying to figure out how to put together a yoke mounted electric trim thumbwheel for my airplane. As of now there is a momentary thumb paddle style switch-- forward push the trim tab goes up, reverse trim tab goes down. (The trim tab on an airplane just controls the pitch of the airplane on a very fine scale, just like pushing or pulling on the control yoke but millimeters at a time.)
I've seen a lot of thumb wheel switches but they are return to center style. I don't like the paddle style switch and prefer the tradional feeling of being able to flick the wheel- so to speak- to adjust the trim. The switch just controls a simple servo that actuates the cable/pully system that adjusts the trim tab.
I'm pretty ignorant when it comes to electronics. Is there a way to do it in just a electro-mechanical way? Maybe a hall effect rotary wheel or something? The crux to me seems like it would be having the switch be able to diffienterate forwards and backwards regardless of position and also open the circuit after the trim tab has reached its limit of travel, so the servo doesn't keep trying to move the cable when it can't anymore. I'm just looking for a basic idea on where to start. There is a lot of stuff on flight simulator trim wheels, but that is all arduino/digital stuff.
Long question I know-- anyput input is much appreciated.