# How can I emulate a senor using a potentiometer

#### Shakespeare

Joined Sep 12, 2022
16
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Last edited:

#### ericgibbs

Joined Jan 29, 2010
18,234
hi Shake,
Which type of Sensor.?
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#### Shakespeare

Joined Sep 12, 2022
16

#### ericgibbs

Joined Jan 29, 2010
18,234
Hi Shake,
Do you mean emulate or simulate.?
As you know, an LM35 is a temperature sensor, we need more details of what you are trying to do with the LM35.
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#### Shakespeare

Joined Sep 12, 2022
16
Hi Shake,
Do you mean emulate or simulate.?
As you know, an LM35 is a temperature sensor, we need more details of what you are trying to do with the LM35.
E
Emulate. When the sensor outputs a certain voltage I want the potentiometer to imitate it.

#### ericgibbs

Joined Jan 29, 2010
18,234
hi S,
This is one option.
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#### Ya’akov

Joined Jan 27, 2019
8,534
Emulate. When the sensor outputs a certain voltage I want the potentiometer to imitate it.
This sounds like a solution in search of a problem. Why do you want to do this? What will the potentiometer control? How will it solve the problem you are working on?

You have presented us with a problem to solve but it certainly seems to be a solution to some other problem you haven't described, and it doesn't sound like a solution to any scenario I can invent.

#### Ya’akov

Joined Jan 27, 2019
8,534
The system requires two temperature inputs. The first temperature input is to be
implemented using a LM35 temperature sensor. The second temperature input is to be
implemented as a variable DC voltage which can be used to emulate ambient
temperature changes. The average of the two inputs controls the heating element
Well, a potentiometer is not the solution to that problem. Though I am not clear how the sensor output can be averaged with itself. If your variable voltage follows the sensor, it will always be directly proportional. Could you clear that up, I am missing something.

Also, what is the voltage range and current you need from the follower?

#### Papabravo

Joined Feb 24, 2006
20,607
You can do literally anything you want to do, and there may even be some utility in doing it, but actually doing it would take less time and effort than asking the question and reading through the answers. Hopefully after doing it you will be able to answer your own question and I can definitely see a purpose in that exercise.

#### SamR

Joined Mar 19, 2019
4,913
It's called scaling... What is the range of the variable you wish to measure? What is the range of the variable that the sensor is able to sense? What is the output of the sensor across its rated range? Is it voltage or current output from the sensor (or even digital or pneumatic maybe)? Then the output of the sensor has to also be scaled for the device/system that displays the sensor's output. Lots of variables. Start with what you are trying to measure and work from there. Scaling appropriately until you have as precise an output display as you can or need.