5
\$\begingroup\$

I have an NTC thermistor that reduces its resistance when temperature increases, but I need a circuit where resistance increases. Without using a different thermistor (or a microcontroller), is there any way that I can reverse the behavior of the thermistor so that resistance increases with temperature? Is there a component that can do this?

\$\endgroup\$
6
  • 5
    \$\begingroup\$ how is it connected in a circuit? \$\endgroup\$
    – jsotola
    Jun 27, 2023 at 17:28
  • 2
    \$\begingroup\$ I haven't built the circuit yet I'm trying to see if this is even a possibility, but it will be going to an LED \$\endgroup\$ Jun 27, 2023 at 17:29
  • 5
    \$\begingroup\$ think about what happens if the thermistor is one leg of a voltage divider ... think about how the output voltage varies with temperature if the thermistor is at top, and if it's at bottom \$\endgroup\$
    – jsotola
    Jun 27, 2023 at 17:34
  • 7
    \$\begingroup\$ this is an XY question ... you ask about what you think is a solution to an unspecified problem, instead of asking about the problem you are trying to solve \$\endgroup\$
    – jsotola
    Jun 27, 2023 at 17:37
  • \$\begingroup\$ If the range of temperature is not too great, you could try a PTC thermistor, usually used as a solid state self-resetting fuse. This might help: tdk-electronics.tdk.com/download/531356/… \$\endgroup\$
    – PStechPaul
    Jun 27, 2023 at 20:47

1 Answer 1

5
\$\begingroup\$

... is there any way that I can reverse the behavior of the thermistor ...

You can't.

But you can "reverse" the behavior of the "circuit" you can use, as this :

enter image description here

\$\endgroup\$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.