Recent content by Matthew Fox

Ohh btw - those weren't my personal coefficients up above. For the CDN AD-DTTC probes, mine are: <pre class="ip-ubbcode-code-pre"> const float a = 0.000546403; //Steinhart-Hart Equation const float b = 0.000195178; //constants const float c =...

I'll test the temp range on my probe this weekend. Likewise I'm hoping for the better part of the accuracy to be on the high end (200 degree). It's right on accurate at room temp. I used an Aburins PID controller to do my calibration and come up with my ABC coefficient values. I have found...

Thank you! You got me on the right direction. I started completely over with the formulas, and also found some other ways to do the calculation from other posts. Here is the working code for anyone else in the world that might ever want this lol.. Thanks for all who helped <pre...

Here is the latest code I'm using. I'd really appreciate any help people can devote. Matt One last rambling thought... my circuit IS not as the author writes in his code. See below... <pre class="ip-ubbcode-code-pre"> Author shows this schematic: 5V -> Thermistor -V- 10K Resistor -> GND...

My ADC readings are accurate, at least they match when I manually compare the ADC reading to the actual temperature chart created by the calculator app. It's gotta be somewhere in the calculations or formula that I have. Right now, it's showing an ADC value of 977. When I compare that to my...

5V -> 10 Resistor-V- Thermistor -> GND | ADC It's setup with the resistor on the 5V side, not ground... Thanks for catching the Fahrenheit calc issue... but I'm still no closer. do I need to change the pad ohms variable to match the actual Thermistor...

Sorry - if it wasn't clear (I'm not use to this Forum yet), my ADC output value is correct (976/1024) as it's a nice 76 degrees in here, and that matches the table generated by the coefficient application. It's somewhere in my code, and I'm not exactly sure what all the different variables are...

Hi - Sorry for opening this thread back up. Hopefully someone can point me correctly. I'm using the same temp probes as Gary (CDN AD-DTTC). I have an Arduino Uno and I'm using the source from his link http://www.arduino.cc/playgrou...onentLib/Thermistor2 (second example as well). I used the...