Jee Labs Talk

Discussion about Jee Labs projects

1. loomi
   Member

   Hi, I don't know if someone already got into this. There is a Atmel 328P in-chip thermometer. Not that it is accurate, but my first try ended with reasonable (+/- 5°C) values.

   I found this code here http://code.google.com/p/tinkerit/wiki/SecretThermometer, and put it on a JeeNode V4.

   If you play around with the following line you can adjust it against a more accurate thermometer. (Best you begin with the linear part of the equation, hence the 125.)

   result = (result - 125) * 1075;
   

   Let me know what you think about this.

   Posted 4 months ago #

2. Jean-Claude
   Key Master

   Great idea, but as you say, not very accurate. The resolution is fairly low, though by using the 1.1V internal bandgap reference, you can probably read it out to about 1°C accuracy. Final point to note, is that it measures on the chip - which is fine for room temp measurements probably, but less so i you need to measure say the temperature of an aquarium ;)

   Posted 4 months ago #

3. epokh
   Member

   Ah, unless you make the jeenode waterproof! :-p What about a waterproof jeenode with acoustic wave communication? I know some researchers using the same technology

   Posted 4 months ago #

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