It would be a better idea to use a precision voltage reference, something like a REF191 together with a known precise resistor of suitable value, and measure the voltage across that, maybe something like this:Ĭhoose the reference voltage and resistor so your self-heating due to current is small enough to not matter in your application. In general it is a good idea to not trust your simulation too much and get to trying it out on a breadboard sooner rather than later. This probably works in a simulation with ideal components but will likely be unreliable with real components. The way I interpret your schematic you are trying to send a constant current through the NTC and measure the voltage drop over it. The LM317 configuration looks to be their current limit application example. Send the moderators a message and we'll unblock it as soon as possible. If you can't find your submission it was probably caught by Reddit's spam filter. Submit your favorites here! Related subreddits

The Scientist and Engineer's Guide to Digital Signal Processing.

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