waterlevel meter with 5 steps

Discussion in 'The Projects Forum' started by Slowman, Mar 11, 2010.

  1. Slowman

    Thread Starter New Member

    Mar 11, 2010
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    0
    A new guy here. Great idea on the reed switch. How would I light 5 leds sequently as the level changes. Also need to light all 5 to test.
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,649
    2,348
    Hello,

    What you just did is hyjacking an existing thread:
    http://forum.allaboutcircuits.com/showthread.php?t=31919

    I moved it to its own thread.

    You can take 5 reedswitches at the different levels.
    A floating magnet can activate the diffternt level readswitched that can switch the leds on.

    Greetings,
    Bertus
     
  3. Slowman

    Thread Starter New Member

    Mar 11, 2010
    2
    0
    Thanks, won't happen again.
     
  4. bertus

    Administrator

    Apr 5, 2008
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  5. someonesdad

    Senior Member

    Jul 7, 2009
    1,585
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    Another approach (that's used in RV water tanks) is to put electrodes on the tank wall and measure the current -- if water is not touching, the resistance will be high, but if the water is touching the electrode, it will be on the order of a MΩ or so.
     
  6. retched

    AAC Fanatic!

    Dec 5, 2009
    5,201
    312
    But, dont do that if measuring fuel. :) Unless you want a lot less fuel and a lot more heat.

    How much room do you have?

    If you have enough room, you can implement a toilet tank-like float arm.

    You can read this many ways. A magnet on the arm that passes 5 hall sensors, or five microswitches or even a linear slide POT.
     
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