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Need to emulate a potentiometer electronically

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blapcb

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potentiometer emulation

I have a mechanical device that basically is tied to a potentiometer that gives out a reading according to the position of the device (say 0 to 200 ohms). This resistance drives an electronic (analog) meter. I would like to replace the mechanical device with an electronic one (for better precision) but still use the existing analog meter for display. So, I need to emulate the resistance. Any ideas?

Added after 7 minutes:


I would like to add that yes there are some very cool digital potentiometers ("digipots") such as those from Microgip or Analog, but they are in the Kohm range and I need one from 0 to 200 or so....
 

doraemon

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electronically simulate potentiometer

Hello!

I don't get the exact picture of what you want to do, but just in case,
you might be interested by these devices.

Edit : Oops, I gave you this response apparently before you added
the last sentence...

Dora.

blapcb said:
I have a mechanical device that basically is tied to a potentiometer that gives out a reading according to the position of the device (say 0 to 200 ohms). This resistance drives an electronic (analog) meter. I would like to replace the mechanical device with an electronic one (for better precision) but still use the existing analog meter for display. So, I need to emulate the resistance. Any ideas?

Added after 7 minutes:


I would like to add that yes there are some very cool digital potentiometers ("digipots") such as those from Microgip or Analog, but they are in the Kohm range and I need one from 0 to 200 or so....
 

FvM

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I don't think, that you need a simulated potentiometer or resistor to drive the analog meter, because the primary input signal is most likely a voltage or current. I guess, it's a bigger problem to achieve similar resolution and accuracy with an electronic position sensor, unless you go for a high end digital position encoders.
 

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