Need help with 741 op-amp circuit.

[wade7waters]

Can anyone help me with a 741 op-amp circuit I have?
I need to know if it is a comparator or differential amp and
what the inputs are for a certain output..
I can email the circuit to you.

Thanks, Wade.

 

[yassin.kraouch]

are you using LM741 ?

 

[vinodstanur]

You can post the circuit diagram here...use 'Add an image' for that....
And most probably, if no feedback, then it will be a comparator...I think so...

 

[wade7waters]

It is an LM741. I will get an image of the circuit and upload it but
it will take me some time. About an hour or two.

Thank you for you help and I will get the image as soon as I can.

Wade.

 

[wade7waters]

Pin 3 is held at +4 volts. What do I need to change the output Hi and then Lo?
What voltage and what polarity?
Thanks, Wade.

 

[vinodstanur]

Use this simple java based simulator for simulating this type of circuits.. ......There you can see the animated current and colour change in each point in the circuit(denoting voltage change).
I think you can solve any of your OP amp related doubts using this interesting java applet.....
Just try it....
Circuit Simulator Applet

 

[wade7waters]

Thanks to vinodstanur my problem was resolved. :smile: