DIY Submersible Temperature Probe - Page 3

**IrregularPulse** · 11-07-2008, 08:31 PM

Quote:

Originally Posted by RoosterCogburn

bumping old thread for worthy cause,

wiring up my lm34's is producing varying results.
taping together all 3 leads results in a voltage varying enough to fluctuate Farenheit temps about 10-15 degrees.

You do have all 3 seperated right? not just soldered, then taped up? If using tape, wrap each solder connection independently then once covered, you can wrap them together. If using shrink, Use the tiny stuff to shrink each connection independently, then a bigger size to bring them all togehter.

Sorry if this seems obvious, but Obvious is usually the overlooked.

RoosterCogburn · 11-10-2008, 12:57 PM

yes, all joints are soldered seperately and insulated

**LooyvilleLarry** · 12-01-2008, 11:31 PM

Yuri -
When using these with your Arduino, what did you use for an adjustment (like tempread * .488) ?

Did you find differences between different probes ?

**Yuri_Rage** · 12-02-2008, 11:06 PM

The LM34 is a pretty accurate, linear sensor. I found that a factor of .5 is pretty darn close.

**jtd_1** · 11-18-2009, 02:28 AM

sorry if this sounds ignorant but this stuff is foreign to me.

Ok so here is the question. If i found out what thermistor my digital therm uses, could i make multiple probes from that using 3.5 mm jacks off of old headphones?

Would this work?

Thanks,

Joe

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