NTC thermistor circuit

Deouss
Posts: 425
Joined: Tue Mar 20, 2018 11:36 am

NTC thermistor circuit

Postby Deouss » Sat Jun 30, 2018 1:45 pm

I have LM393 circuit used for NTC 10K 3950 probe
Link here: NTC Sensor Module
and I am looking for a code measuring the temperature with ESP32 on RTOS

I am not sure how LM393 is connected and how I should calibrate this circuit and how to properly do measurements.
It is supposed to measure the temperature of Air Cond, unit ranging from -15 ~ +80 or more for test purpose.
I actually want to use it also to measure lower temp. on the TEC fridge prototype.

Any suggestion how I do it?
Appreciate all help.
Thanks

Pibbotley
Posts: 45
Joined: Fri Feb 16, 2018 7:06 pm

Re: NTC thermistor circuit

Postby Pibbotley » Sat Jun 30, 2018 4:36 pm

Read the voltage on ao and google code for steinhart equation. The lm393 is not needed.

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