Problem with reading a circuit diagram

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

Thread Status:
Not open for further replies.
  1. zuse2000

    Thread Starter New Member

    Feb 4, 2008
    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
    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
  4. SgtWookie


    Jul 17, 2007
    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

    AAC Fanatic!

    Dec 20, 2007
    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
    since my instructor givem to make energy converter circuit that can change 12/24vdc to 220/ please help me
  7. Antish

    New Member

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


    Mar 24, 2008
    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
    I have already moved his first post to the General section.
Thread Status:
Not open for further replies.