Sharing one thermistor to measure temperature in Arduino and display temperature on external thermometer simultaneously

Other Hardware General Electronics
22

well I need to understand how to wire standalone thermistor and from this I can try to derive to the shared thermistor wiring.

23

I see, thanks... I did not know the formula for temperature calculation could be different for different wiring.

so I will try to open my thermometer and see what I find there.

24

Moreover, when you change your wiring from standalone to sharing thermistor, you will need a recalibrate the sensor and change the formula because all standard calculation in arduino code are for standalone mode only.

25

@riham88
See post #13
Do it wrong and blow up your arduino

26

ok clear, thanks. I will see if I can manage this or if I will give it up.

27

right, I will bear this in mind.

28

Let us know what happens

29

so here is how tpm-900 looks stipped. For me, it's not easy to read where the voltage divider is for a potential connection to Arduino... I would try to connect sensor (-) to Arduino Analog 0 but I am not sure where to put the ground. Any ideas are welcome.

tpm-900
tpm-9001411×808 173 KB

20240126_081728

30

I wouldn't advise you to do this. A 220 voltage is extremely dangerous.
You clearly don't have enough experience for this project.

Moreover, this risk is most likely in vain - most likely you will not be able to correctly calibrate the external thermistor on the Arduino.