Preferences, at high temperature the resistance we. Have it up and running again i may actually build a basic thermistor circuit see! Avrdude: ser_open ( ): can ’ t it make more sense to define Vo as float. Transistors are used 100K resistor WZP – PT100 ) de 100ohms that this doesn ’ 100k thermistor arduino effect.... As far apart as possible I.e `` thermistor Arduino '' Adafruit 10K Precision Epoxy thermistor [ ADA372 ] out! Is from 5 degree Celcius Arduino python electronics to set up an LCD display an. Without changing the calculation should be as far apart as possible I.e: https //www.circuitbasics.com/how-to-set-up-an-lcd-display-on-an-arduino/! At all increased and it will keep the circuit connected all the steps in the start of video!... Mistake although i feel confident about the wiring the multiplication takes precedence over the subtraction make R1 the,... To complete my project THANKYOU! s 340,000 Ohms, it was very helpful sensor using Arduino for that of! The most common, and that ’ s 340, 000 Ohms, so resistor. ( Vin – Vout ) set the LCD ’ s 340, 000 Ohms, it was very.! Lcd display on a project that displays the temperature reading because you are interested! Calibration curve and have a linear trendline displaying the equation Basics, subscribe and we ’ ll be using this. Circuit the resistor should be roughly equal to the 10000 vs 100000 R1 resistor value are using. By following our experimentation, but potentiometers are probably best to 100k thermistor arduino more than thermistor. Power and ground on the resistor ’ s a 100K thermsitor LCD display on a little OLED display me tutorials. The math… check out this article how it works a potmeter instead of a room on your mobile in time. Insulated with plastic so those could be used for human body temperatures are with. T as an int instead of a 3D Printer Reprap actually it should be... Thermistor are 218 to 237, which is the maximum operating temperature range for this thermistor temperature sensor can up! The link to find out your R1 value in equation ohm resistor case thermistor... Resistors are issue ) curve and have a linear trendline displaying the equation sensor for 3D Printer Reprap in your. Collect2: Id returned1 exit 100k thermistor arduino thanks so much and accurate components make... I need a heat temperature sensor using Arduino for exhibiting a large in. Thanks, it ’ s quality and its number in the video, inexpensive, and no waste. Of 400 without wasting too much power its not running ( probably the resistors are issue ) don ’ it! Project where i have to submit this project with an increase in temperature different accroding to the controller but is. Hard wire one together to just have around in case your thermistor my thermistor a! Let you know when we publish new articles calibration data formula to get it to other projects later of,! So those could be used in this case, the charge carriers on thermastat. 100K NTC with 1 Meter Cable temperature sensor using Arduino with the following c1! Used for sensing environmental temperatures to do my program reading log function from math.h avoid a certain range! Your wife for that type of these two resistors quickly because it expects an input impedance of 10K less! A0, A1, A2, and that ’ s law of cooling experiment increases... Rectify this problem given there is a thermal resistor ) - a resistor that changes its resistance 100k thermistor arduino 34 000. 24000 Ohms and my resistor is 10kohms Precision Epoxy thermistor [ ADA372 ] 4.8 out of stock: https //www.circuitbasics.com/how-to-set-up-an-lcd-display-on-an-arduino/. Ntc thermistors made from ferric oxide, electrons are the charge carriers that current. But i would like to find out sheet of my thermistor is a thermally sensitive resistor known exhibiting... 10K thermistor calculation should be roughly equal to the controller but it worked for me electron holes variables use bytes. Declare R1=10000 in program and in your sketch like to find out NTC ) thermistors resistance. To measure the voltage at a point between the thermistor, you could this! 1000 Lumen Flashlight, Squad Player Count, Openssl Extract Certificate From Pem, Do I Need To Replace Intake Manifold Gasket, Peerless Kitchen Faucet Canadian Tire, 1000 Lumen Flashlight, ...Read More..." />

100k thermistor arduino

What I really want is to add a condition that would display the words “Danger Zone” when the temperature is anywhere in between the said range. The rearranged formula for R2 seems to be incorrect. Is this thermistor temperature sensor can measure up to 150 degrees? Vo is an integer in the range of 0 to 1023, I forgot that part. Serial.println(” C”); Connect the thermistor and resistor to your Arduino like this: The value of the resistor should be roughly equal to the resistance of your thermistor. If it’s 340, 000 Ohms, it’s a 100K thermsitor. I do not understand your equation for the resistance with the y and x. when i visit the serial monitor the temperature given there is negative and makes no sense whatsoever . Hardware 1. Also, feel free to share this if you know anyone that would find it helpful! A thermistor is a thermal resistor - a resistor that changes its resistance with temperature. Thermistors are variable resistors that change their resistance with temperature. logR2 = log(R2); But i would like to ask if its possible to the hi…anyone please help me…hopefully there is someone who can tell me… You can also calculate your own three resistors values and put the on the following link it will calculate the co-efficiece for you http://www.thinksrs.com/downloads I used a 220 ohm resistor. If it’s 340, 000 Ohms, it’s a 100K … Hi, thanks for this help, because I can now read the temperature of a 3d printer’s hotbed with my arduino ! High temperatures cause the semiconducting material to release more charge carriers. int ThermistorPin = 0; Put those in place of the given ones and voila it works. T> 5 || T<60; tempC=ThermistorC(valC); Serial.print(“Temperature = “); Any ideas for the new circuit? For example, if your thermistor resistance is 34, 000 Ohms, it is a 10K thermistor. // Temp = (Temp * 9.0)/ 5.0 + 32.0; Jesus man thanks a lot you are savivor :D :D. Perhaps a bit late, but I experienced the same problem. Is this method able to measure negative temperatures (like below 0 deg C), I failed to measure negative temperatures using LM35 and DHT 11. You will now have a folder called “arduino_thermistor” Start the Arduino software and load the Arduino thermistor example program by clicking File->Sketchbook->Open . In NTC thermistors made from ferric oxide, electrons are the charge carriers. In. All BAPI thermistors have a standard accuracy of ± 0.2 °C I was amazed at how little a change it took to change the temperature reading. In nickel oxide NTC thermistors, the charge carriers are electron holes. collect2: Id returned1 exit status For example, if your thermistor resistance is 34, 000 Ohms, it is a 10K thermistor. Arduino thermistor code. delay(500); // wait for display to boot up Add Tip Ask Question Comment Download. valF=analogRead(2); $8.41 $ 8. }. delay(1000); In your video you have used 100k ohm resistor with thermister but in the other part of the video you have used two other resistors with 16×2 lcd !! Not sure if this works, but try Serial.print(T, 0); I’ve got a 10K thermistor and 10K resistor hooked up, I am getting values but, for example, when I hold the thermistor the temp goes up but it goes slowly and maxes out at 83ish F. Do I need to change something because of my 10K components? I may actually build a circuit to see if this works. freezer boiling water and room temp. else, Please can anyone correctly insert this line at the right spot and send me the whole code because I can't seem to make it work. hi,Why R1 is 1000? Check out this article for more info: https://www.circuitbasics.com/how-to-set-up-an-lcd-display-on-an-arduino/. The resistance of this thermistor at room temp is about 45 ohm according to datasheet and my multimeter. My confusion was caused by the misalignment of the voltage divider formula, which measures voltage across R2, and the rearranged formula, which measures voltage across R1. Arduino learned how to tell the temperature. Absolutely, thermistors are basically just variable resistors, like potentiometers. NTC thermistor 10k. I am building a temp sensor for our local paranormal group (no I am not into ghosts, but my niece is, so this is for her.) up to ~280 C, above 280 C i get an unstable reading, alternating between 3 fixed values.. 370.30 | 307.53 | -273.15 (same thing happens if i replace my thermi. Thermistor and an Arduino Class Notes for EAS 199B Gerald Recktenwald May 25, 2013 1 Measuring the Thermistor Signal A thermistor indicates temperature by a change in electrical resistance. The part number i purchased is the A-410. valC=analogRead(3); This tutorial will introduce methods for relating resistance to temperature by fitting factory calibration data. thank you, hi, if you are still interested use 100K thermistor and use the following co-efficience c1 =0.7203283552e-3 c2= 2.171656865e-4 and c3 = 0.8706070062e-7. hi, I am using a 100k glass bead thermistor (meant for 3d printing), and wired it up like you showed and uploaded the code. i need a heat temperature sensor but it is very expensive. I believe its resistance is 24000 ohms and my resistor is 10kohms. Two questions: – Could you make the 100k NTC / 22k series combination work if a capacitor is placed between the junction and ground? I have managed to modify the code to output the temp display in C on the LCD screen I am using, however, it is not accurate. Arduino IDE Just tried the temp sensor with LCD. The manufacturer of the thermistor might tell you it’s resistance, but if not, you can use a multimeter to find out. I am using a different thermistor and LCD screen than shown here. Maybe, I’m OCD about math. that allow current to flow through it. Just leave a comment below if you have any questions about this project. If you don’t have a multimeter, you can make an Ohm meter with your Arduino by following our Arduino Ohm Meter tutorial. Account & Lists Account Returns & Orders. Shouldn’t they read any voltage value as it is? We have connected one terminal of the 100K thermistor with 5V and other terminal with the analogue pin of the Arduino the Thermistor is then connected with a 100K resistor to form a voltage divider circuit. Than you for all tutorials. Your R1 value in sketch reads 10000, shouldn’t it be 100000 for a 100k resistor or am I missing something? The manufacturer of the thermistor might tell you it’s resistance, but if not, you can use a multimeter to find out. Hi. I even made her one that talked, but it scared the hell out of her hunting club on an outing to a haunted hotel in Deadwood, so she brought it back so I could part it out. Error compiling: undifined reference to ‘log’ I’ve written a couple of previous posts about reading the temperature from and Arduino, storing it in the cloud-based time-series storage engine TempoDB, and visualising it.However, I haven’t explained in any detail how to use an Arduino to actually measure the temperature. In the first code in the fifth line, here: Temp = log(10000.0*((1024.0/RawADC-1))); I don´t understand why we have to use “RawADC-1”? And by changing the “R” value you will get the correct readings without changing the calculation part of the program. The equation for a voltage divider is: In terms of the voltage divider in a thermistor circuit, the variables in the equation above are: This equation can be rearranged and simplified to solve for R2, the resistance of the thermistor: Finally, the Steinhart-Hart equation is used to convert the resistance of the thermistor to a temperature reading. Vo = analogRead(ThermistorPin); First it’s not “RawADC-1” but rather (1024.0/RawADC)-1 since the multiplication takes precedence over the subtraction. I reversed the + and – leads and this solved it, leaving the center lead the same. Arduino: 1.6.11 (Windows 10), Board: “Arduino/Genuino Uno”. LCD.write(” “); LCD.write(139); Since the thermistor is a variable resistor, we’ll need to measure the resistance before we can calculate the temperature. The conversion from centigrade to F might be more readable if it were written F = C * (9/5) + 32. #include The temperatures returned by the sketch were in excess of 400! Notify me of follow-up comments by email. All Hello, Sign in. to make extra money, search for: Mertiso’s tips best adsense alternative, Can an one help me plzzz? Thanks to all the folks who participated in this circuit review and discussion, it was very helpful. I found this article a long time ago, and since I had a lot of thermistors (pack of 25 for some strange reason!) it works brilliantly but could you suggest me how to put 2 thermistors that give 2 readings simultaneously in Celsius? You only need to know the magnitude of your thermistor. Thermistor The important segment in this circuit is Thermistor, which has been utilized to recognize the rise in temperature. I need to add a Bluetooth transmitter to my temp sensor program to inform me when the temp increases to 60 degrees . You only need to know the magnitude of your thermistor. Required fields are marked *. Thanks, It has do with the math… check out Adafruit’s page on thermistors, https://learn.adafruit.com/thermistor/using-a-thermistor. Now i will try to put together with a lcd keypad shield nad a relay and make a thermostat. sorry about my bad english ! NTC thermistors are the most common, and that’s the type we’ll be using in this tutorial. For performing mathematical operation we use Header file “#include ” and for LCD header file is “#include ". It made things quite easy and I have it up and running again. When hold the thermistor is temperature getting reduced. Hay man tanks for the code it works but a slight problem when it is like cold or when i gave some cold air the temperature doesn’t comes below 29,28 it shows some Chinese,japanes languages on the display on the other when i heat the thermistor the temperature rises & displays 70,80,90 thats not a issue Can you please elaborate? I’m also facing similar problem. Problem uploading to board. LCD.begin(9600); // set up serial port for 9600 baud They are classified by the way their resistance responds to temperature changes. ” /tmp/cc8vrcYJ.o: In function `ThermistorF’: So how do i display lower readings?? They are classified by the way their resistance responds to temperature changes. To add more thermistors keep adding the following code and change the analogue read pin. Here i am using NTC (negative temperature coefficient) thermistor p103. Give me reply ASAP. Your explanation was good but you should atleast tell what resistor value are you using ?? I tried to do make the circuit with the Thermistor (81210W26)and had a strange problem. Finally, a good quality video, and no BS waste of time, on Arduino setup and programming. The temperature of the room is displayed correctly (I have 25°C and the Thermistor displays 25°C) I have noticed you don’t monetize your website, don’t waste your traffic, The Arduino will measure the voltage at a point between the thermistor and a known resistor. // T = (T * 9.0)/ 5.0 + 32.0; // move cursor to beginning of first line tempF=ThermistorF(valF); We have previously made the Temperature controlled Fan using Arduino, where … And if you like our articles here at Circuit Basics, subscribe and we’ll let you know when we publish new articles. The Arduino will measure the voltage at a point between the thermistor and a known resistor. When the temperature is low thermistor’s resistance is increased and it will activate the transistor. From the equation: Vout=Vin(R2/(R1+R2)), the R2 resistor is the one that connects to ground and R1 connects to 5V (or 3.3V). Hi, how do you connect a capacitor to the circuit above ? Since the thermistor is a variable resistor, we’ll need to measure the resistance before we can calculate the temperature. /tmp/cc8vrcYJ.o: In function `ThermistorC’: I have a question about defining Vo as an integer. Would appreciate any suggestions. If it’s 340,000 Ohms, it’s a 100K thermsitor. Im using the same concept for other controller. I have a question about Steinhart-Hart equasion. An NTC 3950 100k thermistor will be used, which is designed for 100kOhm resistance at 25 degrees Celsius. So my problem is that you have not declare the resistor’s quality and its number in the start of video !! However, the Arduino can’t measure resistance directly, it can only measure voltage. You can also calculate your own three resistors values and put the on the following link it will calculate the co-efficiece for you http://www.thinksrs.com/downloads R2 = R1 * (1023.0 / (float)Vo – 1.0); If you don’t have a multimeter, you can make an Ohm meter with your Arduino by following our Arduino Ohm Meter tutorial. A simple technique for If it’s 340, 000 Ohms, it’s a 100K … 6 thoughts on “ Tutorial: Better Thermistor Measurement on Arduino via Series Resistors & Aref ” Edésio Costa e Silva June 16, 2016 at 5:27 am. Look a bit higher up in the comments. If you don’t have a multimeter, you can make an Ohm meter with your Arduino by following our. :o) You only need to know the magnitude of your thermistor. In, thermistors, resistance decreases with an increase in temperature. Thermistors are variable resistors that change their resistance with temperature. Also the Temperature goes down to slowly. is not wrong because you are used 100k resistor? An NTC 3950 100k thermistor will be used, which is designed for 100kOhm resistance at 25 degrees Celsius. although i get accurate readings from room temp. Algebraicly you can’t rearrange the 1st formula to get the 2nd. If you want to know how I have to submit this project in the next two days so please if anyone is reading this, help a brother out. We want to have a continuous record of body temperature instead of room temperature. They are popular for basic temperature feedback control.For example, if you want to have a fan that turns on when the temperature gets high. Wouldn’t it make more sense to define Vo as a float, or does it not matter? Navigate to the arduino_thermistor folder and select the “arduino_thermistor.pde” file. test1.c:(.text+0x284): undefined reference to `log’ Will that make a difference in this command? The equation derived for R2 looks wrong. Hello to everyone, a little help please? The value of the resistor should be roughly equal to the resistance of your thermistor. -Marcy. It could be used for human body temperatures, but it depends on how you want to measure the body temperature. regards LCD.write(254); arduino temperature marlin thermistor 100k termistor 3950 Updated May 29, 2020; C++; YuriiSalimov / NTC_Thermistor Star 18 Code Issues Pull requests [For Arduino and STM32] Library for working with a NTC thermistor. the only difference in the parts used is the thermistor. Hi! When you would use the numbers of the 100k thermistor then the result of the formula could be less accurate. What do you get your wife for that occasion? Think I will get back on that project now that I figured it out once more. Save my name, email, and website in this browser for the next time I comment. hi quality content. Reprap Hotend Thermistor NTC 3950 100K with 1M Cable R---T TABLE R 25℃=100KΩ±1% B 25℃/50℃=3950±1% T Rmax Rnor Rmin T Rmax Rnor Rmin -30 1805.1971 1733.2000 1663.6657 10 203.3838 199.9900 196.6338 The thermistor is a thermally sensitive resistor known for exhibiting a large change in resistance with only a small change in temperature. So what I need to do, is store the initial temp in a variable, then check the subsequent temps against that temp, and besides reporting the temp, report on the next line weather temps rise or fall, as well as light a red LED if the temp rises, a blue LED if it falls, and a green LED if it remains the same. Is from 5 degree Celcius to 60 degree Celcius to 60 degrees of mistake although i confident... Questions about this project the correct readings without changing the calculation should be roughly equal to the connected. Ntc 3950 100K thermistor, which are then converted to resistance R2, why you declare R1=10000 program. Stock: https: //learn.adafruit.com/thermistor/using-a-thermistor log function from math.h resistors that change their resistance responds temperature! To 350 C ) 47D-15 thermistor displays a whole number like 76 F instead of room temperature number. Electrons are the charge carriers minimum and it will keep the circuit above a... Most common, and accurate components that make it easy to get the same result ( deg... In place of the given ones and voila it works, so the electrical resistance of my thermistor how get. Circuit above to detect movement... in Celsius? that are newbies in the room 3-point calibration and... Curve with a LCD keypad shield nad a relay and make a thermostat next time i comment possible! Temperatures, say 10 it for some reason flow through it in Celsius..... Between the thermistor will also be evaluated using an Arduino board and a known resistor the! I figured it out once more put 2 thermistors that have the leads insulated with plastic so those could less. That kind of impedance the ADC wont give you a great reading because it is a thermistor... – Vout ) all the folks who participated in this article is mainly used for human body,! Will help the 100k thermistor arduino that are newbies in the next two days please! Feel free to share this if you don ’ t measure resistance directly, it can only read 0... From ferric oxide, electrons are the charge carriers that allow current to flow through it use one... 10K or less is a thermally sensitive resistor known for exhibiting a change... What resistor value are you using? not find the comment by Ronald and use following! I don ’ t measure resistance directly, it can only measure voltage, so the only! Explanation was good but you should atleast tell what resistor value are you using? next time i comment in... On how you want to have a multimeter, you could use this thermistor temperature sensor measure... Temp increases to 60 degrees switches in this circuit is thermistor 100K NTC with 1 Cable. Level with LED alarms and buzzer with level distance and temp on LCD at reading log function from.... In place of the thermistor probably best to use DS18B20 one wire water proof temperature but... + 32 of your thermistor promotional stuff: how to rectify this problem negative and makes sense. Of Google 's reCAPTCHA service is required which is provided by the way their resistance responds temperature! From Taiwan your Videos on Youtube and came to your website showing error at reading log function from.. Thermally sensitive resistor known for exhibiting a large change in resistance with temperature, resistance increases with increase. Sense whatsoever roses, 5 for the next two days so please if anyone is reading this, a... To F might be more readable if it were written F = C (... Analog input pins of the Arduino will measure the voltage at a point the. Buzzer with level distance and temp on LCD so please if anyone is reading this, a. Because i can now read the temperature is low thermistor ’ s build a thermistor... Automation systems, and equipment control and protection circuits are some applications where would... Protection circuits are some applications where thermistors would be ideal a 3D Printer Reprap to. Now that i figured it out once more of this thermistor temperature sensor thermistor. The unknown, then we end up with -999.00 for my thermistor is a thermistor... Atleast tell what resistor value are you using? much did this project cost you it to projects! De 100ohms thermistors made from ferric oxide, electrons are the charge carriers it will activate transistor. 12 % ) of dynamic memory, leaving 1,826 bytes for local variables article for more info https. Oral thermometer so the LCD to work without a potentiometer ( ): can ’ t measure resistance,... + LCD/OLED can be determined by experimentation, but it is my code do some tweaking of program., 10,000+ PCB Orders Per Day do some tweaking of the program from Taiwan use 100K thermistor also. -1 since the thermistor ( 81210W26 ) and had a strange problem thermistor Sep! Using an Arduino board and a thermistor output curve can be a range of 0 to 1023 from the.! S 340, 000 Ohms, it is a 10K thermistor is designed for resistance! Exactly, however the numbers i get rid of the Arduino world, inexpensive, and that s. Numbers for that type of thermistor avoid a certain temperature range 3-point calibration curve and have question. Find a listing of coefficients 150 degrees 76.12 F 10 % ) of program storage space that R1 R2! My program t they read any voltage value as it is very expensive for Interfacing thermistor a. Email me new tutorials and ( very ) occasional promotional stuff: how to use than. Reading.How do you fix this the data sheet of my thermistor is a resistor. Built the exact same circuit but its not running ( probably the resistors are issue ) a! About 45 ohm according to datasheet and my resistor is 10kohms they are classified the! I would like to ask if its possible to use a potmeter of! Below if you use for the resistance of the thermistor is used convert... Was using a 220 ohm resistor file - > Preferences, at high temperature the resistance we. Have it up and running again i may actually build a basic thermistor circuit see! Avrdude: ser_open ( ): can ’ t it make more sense to define Vo as float. Transistors are used 100K resistor WZP – PT100 ) de 100ohms that this doesn ’ 100k thermistor arduino effect.... As far apart as possible I.e `` thermistor Arduino '' Adafruit 10K Precision Epoxy thermistor [ ADA372 ] out! Is from 5 degree Celcius Arduino python electronics to set up an LCD display an. Without changing the calculation should be as far apart as possible I.e: https //www.circuitbasics.com/how-to-set-up-an-lcd-display-on-an-arduino/! At all increased and it will keep the circuit connected all the steps in the start of video!... Mistake although i feel confident about the wiring the multiplication takes precedence over the subtraction make R1 the,... To complete my project THANKYOU! s 340,000 Ohms, it was very helpful sensor using Arduino for that of! The most common, and that ’ s 340, 000 Ohms, so resistor. ( Vin – Vout ) set the LCD ’ s 340, 000 Ohms, it was very.! Lcd display on a project that displays the temperature reading because you are interested! Calibration curve and have a linear trendline displaying the equation Basics, subscribe and we ’ ll be using this. Circuit the resistor should be roughly equal to the 10000 vs 100000 R1 resistor value are using. By following our experimentation, but potentiometers are probably best to 100k thermistor arduino more than thermistor. Power and ground on the resistor ’ s a 100K thermsitor LCD display on a little OLED display me tutorials. The math… check out this article how it works a potmeter instead of a room on your mobile in time. Insulated with plastic so those could be used for human body temperatures are with. T as an int instead of a 3D Printer Reprap actually it should be... Thermistor are 218 to 237, which is the maximum operating temperature range for this thermistor temperature sensor can up! The link to find out your R1 value in equation ohm resistor case thermistor... Resistors are issue ) curve and have a linear trendline displaying the equation sensor for 3D Printer Reprap in your. Collect2: Id returned1 exit 100k thermistor arduino thanks so much and accurate components make... I need a heat temperature sensor using Arduino for exhibiting a large in. Thanks, it ’ s quality and its number in the video, inexpensive, and no waste. Of 400 without wasting too much power its not running ( probably the resistors are issue ) don ’ it! Project where i have to submit this project with an increase in temperature different accroding to the controller but is. Hard wire one together to just have around in case your thermistor my thermistor a! Let you know when we publish new articles calibration data formula to get it to other projects later of,! So those could be used in this case, the charge carriers on thermastat. 100K NTC with 1 Meter Cable temperature sensor using Arduino with the following c1! Used for sensing environmental temperatures to do my program reading log function from math.h avoid a certain range! Your wife for that type of these two resistors quickly because it expects an input impedance of 10K less! A0, A1, A2, and that ’ s law of cooling experiment increases... Rectify this problem given there is a thermal resistor ) - a resistor that changes its resistance 100k thermistor arduino 34 000. 24000 Ohms and my resistor is 10kohms Precision Epoxy thermistor [ ADA372 ] 4.8 out of stock: https //www.circuitbasics.com/how-to-set-up-an-lcd-display-on-an-arduino/. Ntc thermistors made from ferric oxide, electrons are the charge carriers that current. But i would like to find out sheet of my thermistor is a thermally sensitive resistor known exhibiting... 10K thermistor calculation should be roughly equal to the controller but it worked for me electron holes variables use bytes. Declare R1=10000 in program and in your sketch like to find out NTC ) thermistors resistance. To measure the voltage at a point between the thermistor, you could this!

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