switch with a resistance

Discussion in 'The Projects Forum' started by nxp, Jun 6, 2010.

  1. nxp

    Thread Starter New Member

    Jun 6, 2010
    7
    0
    Hi!

    I want to active or desactivate a relay when i'm reading a variable resistance. When i read 50 ohm, i need to active a relay. When i read 160 ohm i need to activate another relay.

    I tried iwth a picaxe chip with readadc10. But i think it's a too low value...

    Any idea?

    Thank you
    david
     
  2. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    Are you trying to measure these resistances while they are still in the circuit or are they uninstalled in a board?

    hgmjr
     
  3. JoeJester

    AAC Fanatic!

    Apr 26, 2005
    3,373
    1,157
    What is the total resistance of your variable resistor?
     
  4. nxp

    Thread Starter New Member

    Jun 6, 2010
    7
    0
    The resistance is changed with hardware switch (like a button). I can take two wires at the end and read it with my ohmmeter.
     
  5. nxp

    Thread Starter New Member

    Jun 6, 2010
    7
    0
    minimum is 24 OHMS
    maximum is 170 OHMS
     
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