rheostat or potential meter?

Discussion in 'General Electronics Chat' started by cczone, Dec 26, 2008.

  1. cczone

    Thread Starter Member

    Dec 17, 2008
    23
    0
    Might be doubtful wondering is this a potential meter or a rheostat?
    Or basically both have similar functions? Thanks for advice.
    [​IMG]
     
  2. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    The schematic you posted is a potentiometer wired as a rheostat.

    It provides a means of changing the resistance between the symbol labeled UV (whatever that is) and the wire that goes off to the right.

    A potentiometer has 3 terminals and can be wired as a potentiometer or as a rheostat. A true rheostat has only two terminals, and can only be wired as a rheostat (provides series resistance).

    If a potentiometer has one end terminal connected to a voltage reference level, and the other end terminal connected to a different voltage reference level, then the middle terminal (wiper) can output a voltage potential anywhere between the two voltage reference levels.
     
    Last edited: Dec 26, 2008
  3. cczone

    Thread Starter Member

    Dec 17, 2008
    23
    0
    Thanks for your reply. As i know potential meter has a knob and 3 pins ...
    wired as rheostat means...?
     
  4. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    It is called a "potentiometer" (also called "pot") not a "potential meter".

    I added more information to my original post.
     
  5. cczone

    Thread Starter Member

    Dec 17, 2008
    23
    0
    ok..thanks.....got it..
     
Loading...