I made this thermometer. The video pretty much explains it all. :]
Later on, I replaced the thermistor with a packaged temp sensor from microchip. It was one that just outputs an analog voltage proportional to the temperature. Using this, I could use the same circuitry with more accurate results, and a less complicated algorithm.
hahahahahahahaa!
can u please upload the source code and the schematic diagram for this ?
can i use a picaxe 28 X or 40 X for this and program is using basic ?
or do i have to use a high level language to program it such as C ?
Sorry, I don’t have the schematic (i never made one).
I used C to program it, not basic, so source code might not help.
-Matt
what sensor do you use?? you using wheatstone bridge, voltage divider or just the sensor alone.. tq
What type of thermistor did you use? Where do you get these things from. I’m just learning about them and its needle in a haystack with google.
I was using a thermistor that I got from digikey. An equivalent one can be found here.
http://www.sparkfun.com/commerce/product_info.php?products_id=250
Im just using it in a voltage divider. None of that wheatstone nonsense :]
Hey Matt i’m new to this whole electronics thing. I would like to make the exact same digital thermometer you made. If its not to much trouble could u provide me with a parts list and any other data i might need. i would greatly appreciate it. thank you.
O’Brien,
I dont really have a schematic or parts list. This was back when I didn’t put much planning into my projects. This link should give you enough information to accomplish what you want to with a simpler solution.
http://pscmpf.blogspot.com/2008/12/arduino-lm35-sensor.html
-Matt