Wiring a 10k fader pot?

Discussion in 'General Electronics Chat' started by dfro, Dec 23, 2010.

  1. dfro

    Thread Starter Active Member

    Feb 6, 2006
    37
    0
    I have a simple question. I would like to design a pcb using the following 10k fader pot:

    http://search.digikey.com/scripts/D...ink=hp_go_button&KeyWords=PP1045SB-ND&x=0&y=0

    The pot wiper has two pins, 2 and 2', which are on opposite ends of the part. Should I short them together with a pcb trace, or should I just connect to pin 2?

    Would shorting them together on the pcb eventually guard against scratchy-ness as the pot wears?

    Thanks,
    Dave
     
  2. #12

    Expert

    Nov 30, 2010
    16,261
    6,770
    Just pick one and connect it. The pins do nothing about preventing wear or dirt inside the pot.
     
  3. dfro

    Thread Starter Active Member

    Feb 6, 2006
    37
    0
    Thanks #12,

    I will wire to a single pin.

    It seems that the 2' pin is provided for convenience. A pcb designer can use either 2 or 2', whichever one allows the pcb artwork to be the cleanest.

    Dave
     
  4. bertus

    Administrator

    Apr 5, 2008
    15,647
    2,346
    Hello,

    Dual pots have two sets of connections:
    1 , 2 and 3 is one side (left),
    1' , 2' and 3' are the other side (right).
    The connections of the sides can not be mixed.

    Bertus
     
  5. dfro

    Thread Starter Active Member

    Feb 6, 2006
    37
    0
    bertus,

    This particular fader pot is not a dual pot. It has a pin 1, pin 2, pin 2', pin 3, four dummy pins that are connected to nothing, and two pins in the middle that are part of the case (I will be attaching these to ground to get some shielding).

    An ohm meter shows that 2 and 2' are part of the same 0 ohm strip that is inside the pot.

    Dave
     
  6. bertus

    Administrator

    Apr 5, 2008
    15,647
    2,346
    Hello,

    OK, if it is a single pot, both 2 or 2' can be used.

    Bertus
     
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