[simpits-tech] Slide potentiometers

[Jeroen Huijben]

My guess would be that the two outer kugs are the outer ends of the pot and 
that the two middle lugs connect to the wiper.

I don't know how you tested it but if my guess is right then the resistance 
between the outer lugs should be fixed and equal to the pot's stated 
resistamce and the resistance between the inner lugs should be 0 regardless 
of wiper position.
the resistance between an outer and an inner lug should change as you move 
the wiper.

If you want to mount the pot as a variable resistor (like on a gameport) 
then you must connect one wire to an outer lug and one wire to an inner lug.
It won't matter which inner lug and by changing the outer lug you can invert 
the pot's response.

If you want to mount the pot as a potentiometer (like in modern digital 
joysticks) then you must connect the supply voltage and the ground to 
opposite outer lugs and the signal wire to an inner lug.
Switching outer lugs will invert the response.

>From: Matt Bailey <mattb at rtccom.net>
>
>Howdy,
>
>   I just got some slide pots for flight controls (these: 
>http://www.mouser.com/index.cfm?handler=displayproduct&lstdispproductid=210527&e_categoryid=316&e_pcodeid=03121 
>)
>but didn't notice until they arrived that they had four solder lugs. I'm 
>used to the 3-terminal kind. After checking with a multimeter, it
>looks like these have two grounds, sound right? So what exactly is the 
>"right" way to wire up these guys? Ground both terminals?
>
>Sorry for the dumb question, new territory for me. :)
>
>	-Matt Bailey

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