Problem with reading a circuit diagram

Discussion in 'Homework Help' started by zuse2000, Feb 4, 2008.

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  1. zuse2000

    Thread Starter New Member

    Feb 4, 2008
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    I have a circuit diagram cotaining an IC (LM358) diagram is divided into two parts each part contain decription of the connection of 5 limbs of the IC (with 8 Limbs) one limb is being repeated twice and the IC is labelled 1/2 LM358 in each diagram, my question is that each one of the two diagrams is a miror of the other with one labelled left and one labelled right does this mean that each of the two diagrams is separate from the other totally and that I should use the components in the circuit twice (resistors and capacitators) or that I can simply connect the IC limbs to common components and use them only once
     
  2. nanovate

    Distinguished Member

    May 7, 2007
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    Could you post the diagram?

    I would assume that you need seperate components for each LM358 subcircuit (opamp).
     
  3. zuse2000

    Thread Starter New Member

    Feb 4, 2008
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  4. SgtWookie

    Expert

    Jul 17, 2007
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    Ok, the Vcc and ground connections to pins 8 and 4, respectively, aren't physically made twice - they're simply shown twice.

    There should also be a small capacitor, 0.1uF, from pin 4 to 8.

    Pins 2,3, and 1 are one amplifier inside the LM358.
    Pins 6,5, and 7 are the 2nd amplifier.
     
  5. Audioguru

    New Member

    Dec 20, 2007
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    The opamp is an inverting type with a 1k input impedance that is loading down the high impedance output of the microphone.
    The opamp should be connected as a non-inverting type with a high input immpedance.

    The LM358 is too noisy (hissss) for a mic preamp and it has crossover distortion because it is one of the first low power opamps ever made. A TL072 dual opamp is low noise, low distortion and costs only 8 cents more. It has the same pins numbers.
     
  6. Antish

    New Member

    Jun 13, 2009
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    since my instructor givem to make energy converter circuit that can change 12/24vdc to 220/240vac.so please help me
     
  7. Antish

    New Member

    Jun 13, 2009
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    hi.i need energy convertor circuit diagram of 12/24vdc to 220/240vac
     
  8. Wendy

    Moderator

    Mar 24, 2008
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    This is called hijacking, and is strongly discouraged. Please start a new thread, and refer back to this one instead.

    You are also better off making a stab at giving us design, people respond better if they think you are trying too.
     
  9. beenthere

    Retired Moderator

    Apr 20, 2004
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    I have already moved his first post to the General section.
     
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