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
can you send me a copy of circuit diagram of this digital thermistor
I am developing a tool to simulate thermistors, mainly for the hvac industrie… I would like to pick your brain a little i have gotten the simulation part down but I would also like to make this tool more functional… if you are interested my e-mail add is redskinsfan1973@yahoo.com
hi,
I am trying to do a similar projects but with transistors measuring the light in a dark room. However, I am really bad with programming in C. Could you please send me or publish your C code so that I can see the idea and logic behind. Did you set up some special features for the analogue-digital converter?
thnks a lot, would appreciate a lot if you share your code with me.
dear sir ,
i am from Pakistan where no digital thermostat is available,i want to make an incubator for which i need a digital thermostat, please give me the list of parts and circuit diagram
actually in Pakistan no trusted site deliver its products such as (ebay, amazone)
that is the reason i am making it myself, If it is not possible please give me another way from which i can maintain temperature on 98F or 36C
thanks
Zubair khan