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How to add bypass cap in a pots used as rheostat

Discussion in 'General Electronics Discussion' started by electronoobz, Jan 28, 2013.

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  1. electronoobz

    electronoobz

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    Jan 14, 2012
    you guys know that to use it as a rheostat we tie the pin 1 and 2 together..


    but how to put a bypass cap like in here?

    [​IMG]

    should i put it in pin 1 and 2 also?

    or pin 1 and 3???
     
  2. davenn

    davenn Moderator

    13,710
    1,911
    Sep 5, 2009
    hi there

    but you are showing the cap across R1 ... well almost the top of the cap isnt connected
    R1 is a fixed resistor so it only has 2 wire legs, so there is no choice to consider

    Dave
     
  3. Harald Kapp

    Harald Kapp Moderator Moderator

    10,770
    2,426
    Nov 17, 2011
    Dave, R1 is supposed to be a linear pot. The wiper is just not shown in the conventional way, cf. R3.

    @Electronoobz: what are pins 1, 2 and 3?
     
    Last edited: Jan 29, 2013
  4. davenn

    davenn Moderator

    13,710
    1,911
    Sep 5, 2009
    well that's pretty flamin' dopey huh, how the heck is some one supposed to know its a trimpot when the diag shows it as a fixed resistor

    parts list R1 2k linear isnt really good enough :rolleyes:

    Dave
     
  5. electronoobz

    electronoobz

    226
    0
    Jan 14, 2012
    Im not sure if this is right.. Should i connect 1 and 2 with cap instead tie 1 and 2??
     
  6. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,448
    2,809
    Jan 21, 2010
    Well, nothing here seems to be connected as a rheostat (variable resistor).

    Of course, unless R2 is variable.

    Place an arrow on those leads indicating they're a wiper.
     
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