weight sensor

Discussion in '8bit Microcontrollers' started by jim shirreffs, May 18, 2008.

  1. Does anyone know where I can get an low cost weight sensor? I have looked
    and looked and looked but can't find one anywhere. I know they exist since I
    can buy a digital bathroom scale for under $20 usa and the bathroom scale
    has 4 sensors (strain gages) built into it. Unfortunately a strain gage
    requires some kind of signal amplification that is beyond my limited
    abilities to assemble.

    What I would like to find is a component that has the strain gage and the
    signal amplification all build into it. The load would be in the 20 - 90 lbs

    thanks in advance to any and all that reply.
    jim shirreffs, May 18, 2008
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  2. Thanks for taking the time to reply. I want to prototype an idea I have and
    if the idea truns out to be a good one then perhaps go into low volume
    production. My problem is that I am a computer programmer not an electrical
    engineer. So I am trying to find low cost components that I can assemble on
    a bread board for a prototype.

    I did find this at

    Model CZL902
    Rated load: 50KG
    rated output: 1.0+-0.15MV/V
    dimensions: 34*34*7.8(mm)
    Cable spec: 0.8*420mm

    To my simple non-ee mind it looks like this might be useable out of the box.
    I am hoping to find one I that I can just read the voltage and then compute
    the weight.

    jim shirreffs, May 26, 2008
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