LC Meter -- Colpitts Oscillator

Discussion in 'Homework Help' started by Devil Moo, Apr 11, 2015.

  1. Devil Moo

    Thread Starter New Member

    Apr 11, 2015
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    LCMeter_Core.png
    I have tried to build a meter to measure capacitor like the above.

    Finally, I build it but it does not work.
    LCmeter20150411_231105.jpg
    Both sides are 0V.
    It does not have any oscillation.
    What wrong am I?

    Moved image to forum
     
    Last edited by a moderator: Apr 12, 2015
  2. t_n_k

    AAC Fanatic!

    Mar 6, 2009
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    I suspect others like myself are wary of off-site links to attachments. Especially those that include a pop-up offering to update my android system.
     
  3. ericgibbs

    AAC Fanatic!

    Jan 29, 2010
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    What is this 0V for .?? [ circled Red]

    EDIT:
    Also the 0V at the bottom of the Cap 'C' under test.?
     
  4. Devil Moo

    Thread Starter New Member

    Apr 11, 2015
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    Because I measure 0V on both sides of capacitor.
    Now I fix it. And the frequency is generated.
    I am using Kerry Wong LC Meter With Frequency Measurement but I am confused with the code on the Arduino Uno.
     
  5. ericgibbs

    AAC Fanatic!

    Jan 29, 2010
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    What did you find that was wrong that you fixed.?

    Sorry I cannot help with Arduino, others members may be able to advise you.
    E
     
  6. Devil Moo

    Thread Starter New Member

    Apr 11, 2015
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    Because I found that his schematic is mixed about the L and C.
    Now I am going to use AD7746 to pass capacitance information to arduino uno.
     
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