How Easy Is It to Use a Thermistor?!

Thermistor as thermometer.

Nov 8, 2016

97117 views

15 respects

Components and supplies

1

Breadboard (generic)

1

Arduino UNO

1

Jumper wires (generic)

1

Thermistor NTC 10K

1

Resistor 10k ohm

Apps and platforms

1

Arduino IDE

1

Arduino Web Editor

Project description

Code

Thermistor

arduino

Downloadable files

termistore_bb.jpg

termistore_bb.jpg

termistore_schem.jpg

termistore_schem.jpg

termistore_schem.jpg

termistore_schem.jpg

termistore_bb.jpg

termistore_bb.jpg

Comments

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milespeterson101

a year ago

Very nice Project! However, I need some help. I was wondering how I could make a code so that if the temp of the sensor exceeds a certain value, an LED could light up, or something like that. I know I need an if statement, but this is a very confusing concept of that. The code should go somewhat like this: -setup of the thermistor- void setup() -more setup for the thermistor- -if statement- -enables a PWM pin when the temp is above a certain value- -else statement- -disables a PWM pin when the temp is below a certain value- void loop() -even more setup of the thermistor- -end of code- If anyone can help me on how I can do this the right way, please let me know. I am hoping to get this code right soon, and make a project from it. Thank you (:

Anonymous user

2 years ago

Hello everyone This program is good for 10 K Ohm ntc resistors if 1- The 10 KOhm series resistance conected to ntc 2- Vcc should be connected to 10 kOhm and ntc should be connected to ground. 3- and finally The common point is connected to A0 pin

Anonymous user

2 years ago

I am beginner but my task to send this reading to cloud can any one please tell its important to for me to submit task

Anonymous user

2 years ago

Ma ma mia very naice

Anonymous user

2 years ago

Your code not work. I tried the temperatures goes inverted. i tried panstamp library and works. what's wrong? panStamp library contact@panstamp.com

Anonymous user

2 years ago

This works only for NTC. For PTC you need to create polynome or function like this : https://www.schmidt-welt.net/weblog/arduino-and-kty81-210/ ..with parameters matching your sensor.

Anonymous user

2 years ago

Hi there the schematic shows a 220 resistor. Unless i'm mistaken ( an i often am) i think it should be a 10K resistor

Anonymous user

2 years ago

How to calculate resistance of thermistor

Anonymous user

2 years ago

I've found that reversing the power connections corrects that reverse sense, but I'm not sure that is the best way to remedy that. Given the fact that a Negative Temperature Coefficient (NTC) thermistor is used, as the temperature increases, the thermistor resistance decreases. This results in the thermistor "output" voltage being closer to ground (lower) when connected as depicted in the schematic images of this project. So, the source of the issue is probably in the math of the code or the coefficients used.

Anonymous user

2 years ago

Hi, I tried circuit but temperature goes in reverse direction. By heating sensor Temperature goes down!!!

Anonymous user

3 years ago

I've found that reversing the power connections corrects that reverse sense, but I'm not sure that is the best way to remedy that. Given the fact that a Negative Temperature Coefficient (NTC) thermistor is used, as the temperature increases, the thermistor resistance decreases. This results in the thermistor "output" voltage being closer to ground (lower) when connected as depicted in the schematic images of this project. So, the source of the issue is probably in the math of the code or the coefficients used.

Anonymous user

3 years ago

Hi, I tried circuit but temperature goes in reverse direction. By heating sensor Temperature goes down!!!

Anonymous user

3 years ago

Hello everyone This program is good for 10 K Ohm ntc resistors if 1- The 10 KOhm series resistance conected to ntc 2- Vcc should be connected to 10 kOhm and ntc should be connected to ground. 3- and finally The common point is connected to A0 pin

Anonymous user

3 years ago

I am beginner but my task to send this reading to cloud can any one please tell its important to for me to submit task

Anonymous user

4 years ago

Hi there the schematic shows a 220 resistor. Unless i'm mistaken ( an i often am) i think it should be a 10K resistor

Binary_Designer

5 years ago

Thank you very much! It was very nicely explained and worked right away.

Anonymous user

5 years ago

Your code not work. I tried the temperatures goes inverted. i tried panstamp library and works. what's wrong? panStamp library contact@panstamp.com

Anonymous user

2 years ago

This works only for NTC. For PTC you need to create polynome or function like this : https://www.schmidt-welt.net/weblog/arduino-and-kty81-210/ ..with parameters matching your sensor.

Anonymous user

6 years ago

How to calculate resistance of thermistor

Anonymous user

6 years ago

Ma ma mia very naice