Trimpot as a variable resistor

Started by blueherdim7, January 04, 2009, 05:35:43 PM

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blueherdim7

Hello all-

Sorry to start a new thread for this but I can't work this out via searching....I want to put some trimpots in place of some resistors to tweak the tone of my Kay Fuzz clone.  A trimpot has 3 lugs but the resistor location on the pcb obviously has only two holes.  Should I take the positive side of the resistor location and solder lug 1 then solder lug 3 to the wiper and then the wiper to the more negative side of the resistor location?  Or is there some other way.  I want to get as much of the 100k trimpot available to the circuit and it seems if I only use two lugs I will only get about half the trimpot value.  Thanks for any advice.

Regards.

Jon
Pedals built=Kay Fuzz Clone...more to follow!

zyxwyvu

You can just connect the wiper to one of the resistor holes, and one of the other two lugs to the other hole. It doesn't matter which goes in which, as long as you're not concerned which direction turning increases resistance (if it's internal, who cares though). You will get the full range of the trimpot this way. You can also connect the extra lug to the wiper if you want - it doesn't change anything.

blueherdim7

Great that's what I need to know.   Cheers.

Jon
Pedals built=Kay Fuzz Clone...more to follow!