Pot with detent?

"Steamboat Ed" Haas

···· --Howdy! I've been fiddling around with using a pot to·position a "servo". I'm using·the teeny weeny one from Parallax that needs to be turned with a screwdriver. The application is to drive one of those surplus windshield wiper motors; I'm using the PWM output to send signals to a Victor motor controller and this is working very well. The trouble is determining, with certainty, that the motor is in "neutral", so to speak. What I'm trying to do is use the motor as a winch to move a small load up and down on an art car I'm building. The winch will position the load one way when the vehicle is in motion and in another when it's parked. I'd like to control the position of the load with a big, easy to grasp knob on a pot that's located a few feet from the BOE. What's needed is a tactile feedback of some kind so that I know when the motor is in "neutral", so that the load isn't creeping. Text and photos of project to date at: www.nmpproducts.com/artcar.htm.
···· --Any suggestions appreciated.
···· --Oh, a PS: will there ever be a solderable BOE that includes the·cluster of two sockets·and four·servo·plugin locations?

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
························ Hacking the Trailing Edge!
················http://www.nmpproducts.com/intro.htm
················---Decks a-wash in a sea of words---