hi D,
An AD8515 OP AMP as shown in post #21 would be suitable.
Which OPA types other than a 741 do you have in stock.?
E

Thank you

 

hi D,
An AD8515 OP AMP as shown in post #21 would be suitable.
Which OPA types other than a 741 do you have in stock.?
E

UA741CN

 

hi Dinesh,
A 741 is not suitable for your project when using a single supply voltage of say 5V
If you had a +/-12V dual supply, a circuit could be built around a 741.

E

 

I

hi Dinesh,
A 741 is not suitable for your project when using a single supply voltage of say 5V
If you had a +/-12V dual supply, a circuit could be built around a 741.

E
View attachment 198328

I need to give 12volt supply for the amp.
But I can give the inverting and non inverting input to 5 v??

 

hi D,
I do not understand your question.
Draw and post a sketch showing what you are asking.
E

 

The 741 opamp was designed 52 years ago to use a +15V and -15V supply. You might find one that works in the circuit that is shown if it is powered from +12V and -12V. The last time I used a 741 opamp was about 30 years ago and it did not work properly.

 

 

hi D,
It is not possible to use a single 12V power supply in that way, there is no common ground/0v reference for the supply.
E

 

hi D,
It is not possible to use a single 12V power supply in that way, there is no common ground/0v reference for the supply.
E

Can you suggest me with a circuit diagram please

 

Your opamp's + input is at +2.5V but the datasheet of an old 741 opamp shows that some of them have inputs that do not work if its voltage is less than 3V.
The datasheet for an old 741 opamp shows a +12V and a -12V supply, and where they are joined together it is ground.

 

If you insist on using the ancient 741 op amp, then you need ±12V supplies, as previously noted.
Example circuit below.

 

hi D,
This is the only single supply option I can suggest that suits the 741, requires two LM741 and an isolated supply.
This is a simulation, I would strongly recommend that you try the circuit on a project board and prove the circuit before final assembly.

E
BTW: there are 5vDC to +/-12Vdc 1Watt miniature PCB mount modules available, can you buy this type.?

 

For practical experiments i used UA741 op amp but for development there only way is that i have only 5v input for op amp.

 

It would be easier to use a MAX1044/ICL7660 and create a -5V supply.
Now you have a bipolar supply.

 

this is the one i have use for experimental purpose u can see the input is 1v and its output is 3.998v

 

@Dinesh_rd7

hi Dinesh,
Is this a College or School project, you seem to be limited in the parts you can use.??

E

 

I used AD8515 only theortically, and i have got as shown

 

It would be easier to use a MAX1044/ICL7660 and create a -5V supply.
Now you have a bipolar supply.

that's not enough for a 741 in this requirement.

For practical experiments i used UA741 op amp but for development there only way is that i have only 5v input for op amp.

If you only have 5V power then you can't use a 741.

I used AD8515 only theortically, and i have got as shown

The negative side of the power source must be connected to ground.
It cannot be left floating as you show.

 

hi,
The 5V supply has no ground reference, it will not work.
E