Arduino Multi Temp Sensor Using NTC Thermistors

A Thermistor is a component which changes its resistance in relation to the temperature around it. We'll use multiple ones along with regular resistors to measure the temp within the various cells of our new LifePO4 Battery pack to make sure nothing is heating up inside of it.

This uses a simple Arduino Sketch and just these handful of components to measure these localized temperatures quite accurately. If this kind of project is one you are planning yourself, or if you're just interested to see these Thermistors in action, then check out this video.

If you like our video, please do give us a thumbs up as that really encourages us to produce more content like this, and many other topics, as we build our dream robot, one circuit at a time.

[CyFi]

This helped me a lot, thank you sir! I used it to help me montior 4 separate thermistors and use one of them to trigger a relay on and off based on the temperature setpoints. I added my delay at the end of the code so that I get a set of readings for all sensors ever 1 seconds

[bitchkoemer]

Hello,

In the schematic you are using a 100 k pulldown resistor for the 100k NTC. (same in scott's article)
In the code you are setting R1 to 10k, so the voltage divider is different.

What is the correct value for this resistor?

Thanks in advance,
Michel De Meester (Belgium)

[denndy]

thanks dude, your code helped me a lot!

[TomLigman]

great video explanation, this clearly and succinctly answered my question :)

[krutidesai]

Hello
Really helpful video. I had a question when you say battery pack do you mean battery of Arduino?
Could you list all the circuit components for this ?
Thanks

[coachgeo]

grrr. youtube ate 80% of this post. Trying again.

got a opposite-ish question for you. Using one battery area temp thermister's output for input into multiple solar charge controllers.

Ive five small IP68 (water+dust proof) controllers [10amp, 24v ] each will be mated to their own 24v panel. Its what I got. Possible advantage is put controllers by solar panels (they are made to be outside anyway) and parallel their output into one + - wire of proper gauge to avoid voltage drop. Send that paralleled charge output on down to the batteries further downstream. Would be less wires to run compared to output of each controller on its own down to a combiner box in a cabinet somewhere near battery.

Draw back is each controller has what appears to be a small pigtail with what might be a 10K thermister. (typical use of these controllers is to install them near the battery). My question thus is.. could I snip off the thermister from each (assuming they are thermisters).. parallel wire all the controllers temp sensor input wiring together and run this in one set of long wire + - (appropriate gauge) down to battery cabinet with ONE of the thermisters soldered to it to read the area temp of battery cabinet) aka... one thermister... for temperature input into five controllers.

look forward to your and others advice.

[janwillemgerritsen]

In the sketch float R1 = and not 10000