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searching for sensitive load cell

Discussion in 'General Electronics Discussion' started by foTONICS, Jul 28, 2012.

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  1. foTONICS


    Sep 30, 2011
    In my final year of schooling I have chosen to design and build an electronic beer pong table.

    Nothing fancy, just a circle of LED's that shine one color when the glass is full, a different when it is empty, and off when nothing is there.

    I've started to research into what kind of sensor I should use and have thought about load cells, but I'm having trouble finding one that is sensitive and small enough to measure the roughly 3 grams of an empty dixie cup.

    any leads?
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    Isn't there a thread for this already?

    Can you modify the cup? Placing a thin inductor and capacitor under the cup would create a tuned circuit you can detect. Any liquid in the cup will change the resonant frequency.

    I am reminded of grid dip oscillators.
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