hey guys i am finding a way to convert a +10v or -10v as the input of a differential amplifier and hopefully get an output as 0 to 3.3v. can anyon help me with the ciurcuit which I should be dealing with.

 

If I understand what you are saying you have a single ended signal that ranges over -10V to +10V and you want to map that o 0-3.3V. You can do it in two steps by first using an attenuation stage with a gain of 0.165 = 20V/3.3V. So +10 V will map to 1.65V and -10V will map to -1.65V. You take this result and add an offset of +1.65V and you have the desired output. It will certainly work if you do this in two separate stages, but in most cases you can find a single amplifier solution for any linear transformation. That is any equation defined by the equation of a straight line.

 

can you suggest any circuit with all the components

 

Input -10 to +10, Output 3.3 to 0V

 

can you suggest any circuit with all the components

You should be able to get close from that description. For one thing you know that a non-inverting stage cannot have a gain of less than 1. I'd expect you to get the inverting gain stage correct. The offset is a bit more difficult.

 

Here's one without diff amp.
It can be operated at 3.3v supply with value changes, but will require RR opamp.

 

You will get more appropriate answers if You will provide the details and a
description of all Components involved,
and what creates the plus/minus-10-Volts, and under what circumstances,
and why You need a variable 0 to 3.3-Volt Output.

Otherwise, everyone here is just guessing.

And, knowing these Forums, most of the good folks here will
continue to make guesses as to what You are actually doing
for "weeks-on-end" until You start to provide the required information needed to
gain enough understanding of the Project to make it possible to arrive at a workable solution.
.
.
.

 

You said you wanted to convert "+10v or -10v " to 0 to 3.3v. That can be interpreted many ways.
It could mean that +10V converts to 0V, and -10V to 3.3V.
Or it could mean that +10V OR -10V converts to 3.3V and all other voltages convert to 0V.
It could mean that there is a linear relationship between input and output, therefore 0V converts to 1.65V.
Which is it?

 

Perhaps you could tell is the expected output for -10V, -5V, 0V, +5V, and +10V. That would make things clearer.