Math Problem

[mister_e]

You could still build a lookup table and use some interpolation between some points, that should do the trick and way easy to implement.

[Acetronics2]

Hi, Folks

I knew something REALLY simple was available ... but Where ???

http://www1.produktinfo.conrad.com/d...K_5Prozent.pdf

In the Application notes section ( You must scroll down ... the left side menu doesn't work !!! )

Alain

[erice1984]

Wow, you mention that and I look at the gauge that the sender was supposed to work with and they did that!

[erice1984]

So I looked at the resistor that was used, its 510

It brings the change in resistance per degree down to
3 ohm from 100-150
2 ohm from 151-200
1 ohm from 201-250

Isnt that crazy.

[erice1984]

I am going to use an op amp to get me full range of my 0-5v scale instead of this 0-1v stuff... would that limit the signal from "bouncing" around?

[mister_e]

You could filter your signal in hardware, or in software (averaging results). I tend to use hardware in many case as it's just a matter to add a capacitor or any kind of Low-Pass filter. On the other hand, a combination of both is also good depending how fancy you want it.

[erice1984]

interesting, I have heard about the capacitor trick. How would it be done "averaging" in software?