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

 

Could you post the diagram?

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

 

 

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.

 

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.

 

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

 

hi.i need energy convertor circuit diagram of 12/24vdc to 220/240vac

 

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.

 

I have already moved his first post to the General section.