Help with a simple circuit

Discussion in 'The Projects Forum' started by Benjam, Sep 21, 2006.

  1. Benjam

    Thread Starter New Member

    Sep 21, 2006
    2
    0
    I am currently studying Engineering
    I need to be able to sence if something is dry rather than damp. I have currently designed a moisture tester and i was wondering what simple thing i can change/add to the circuit to set off an alarm when something is dry rather than moist.

    Cheers
     
  2. pebe

    AAC Fanatic!

    Oct 11, 2004
    628
    3
    If you post the cicuit you have designed, members will be able to suggest ways of modifying it.
     
  3. Benjam

    Thread Starter New Member

    Sep 21, 2006
    2
    0
    i hope the attached document helps.
     
  4. nomurphy

    AAC Fanatic!

    Aug 8, 2005
    567
    12
    Just invert the output of the moisture detector. For example, instead of the output being a logic high when wet, it will be a logic high when dry.
     
Loading...