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Reading a Schematic and help understanding what materials needed

Akosha
Akosha over 2 years ago

image

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  • shabaz
    shabaz over 2 years ago +4
    This is not a good circuit. It looks like someone's experiment... Clues: It is badly laid out with GND net connections pointing upward (instead of downward towards ground), and messy layout. Also the creator…
  • robogary
    robogary over 2 years ago in reply to Akosha +4
    Avoid this plant in your recording endevours .
  • ggabe
    ggabe over 2 years ago +2
    Akosha , why do you need materials? If you plan to build the circuit, please let us understand your goal, there are much better "things" to build, other this impractical 741 circuit.
  • shabaz
    shabaz over 2 years ago

    This is not a good circuit. It looks like someone's experiment...
    Clues: It is badly laid out with GND net connections pointing upward (instead of downward towards ground), and messy layout. Also the creator didn't understand how component references work.
    Electrical clues: It's using a 741, about the worst op-amp in production today. Crazy-high gain for both stages, making this circuit useless for many typical use-cases due to low bandwidth, plus a high chance that all you will see is (say) +7V or -7V or so on the output, due to input offset not being able to be nulled out enough for the second stage. Datasheet ignored regarding supply decoupling capacitors too.

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  • Akosha
    Akosha over 2 years ago in reply to shabaz

    thank you for the feedback. It is for amplifying the frequencies of plants in the input. So, I may get a greater output feedback without doing harm to the plants, and then using an adc to turn the analog sound into binary to put into my software. Do you have any suggestions on how that could be done?

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  • ggabe
    ggabe over 2 years ago

    Akosha , why do you need materials?

    If you plan to build the circuit, please let us understand your goal, there are much better "things" to build, other this impractical 741 circuit.

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  • shabaz
    shabaz over 2 years ago in reply to Akosha

    Hi, more information is required.. to me, the question makes no sense unfortunately.

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  • dougw
    dougw over 2 years ago in reply to Akosha

    It probably needs a low offset amp like an OPA2333 hooked up as a non-inverting amplifier with high gain.

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  • ggabe
    ggabe over 2 years ago in reply to Akosha

     Akosha, the best way to describe an amp to to specify the min and max input voltage, the input impedance, the frequency range, and the expected output. Seems you need AC amp, and not a precision DC, based on your mention of "frequency, sound" and possible spectrum analysis. Is that right? 

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  • Akosha
    Akosha over 2 years ago in reply to ggabe
    • Yeah, that's right. My intended use is to use electrodes to monitor the electrical changes within plants, and to convert that information into a software to produce the sound, so then I can mix my own music and sounds alongside the plant frequencies 
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  • Akosha
    Akosha over 2 years ago in reply to Akosha

    Do standard audio interfaces have the capabilities to do this? I was under the impression I'd have to create a whole circuit for this process. Also if so, any suggestions to go about that. I appreciate your responses.

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  • robogary
    robogary over 2 years ago in reply to Akosha

    Avoid this plant  in your recording endevours

    . image

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  • shabaz
    shabaz over 2 years ago in reply to Akosha

    Can you point to any scientific document that describes the phenomenon youre trying to sample? That may help define your technical requirements, because currently there are none.

    If it's not something you can find, then perhaps it is something experimental? In which case, you could try a sound card. I doubt it will work, because it sounds like pseudoscience. But I'm open to reading any document if you can provide it.

    Maybe you mean impedance measurement, in which case that requires a different circuit.

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