how to connect thermopile

Created Fri, 13 Apr 2012 15:26:03 +0000 by scoprire

scoprire

Fri, 13 Apr 2012 15:26:03 +0000

How i can connect a thermophile with arduino? there are something to amplifier the signal from <1V to 3V? Why if i make an analogRead on a pin without any connaction the value readed is near 700-800?

Jacob Christ

Tue, 17 Apr 2012 06:29:33 +0000

If you need to heat and cool you are going to need an h-bridge. If your just heating or cooling you can use a single transistor to turn it on and off. And you should defiantly monitor the temperature. It only take a few seconds for these to get so hot they desolder themselves and fall apart. You probably can't heat or cool very much using the current drive out of a pin on the processor. You probably need to drive an amp or more.

Jacob

scoprire

Tue, 17 Apr 2012 19:17:33 +0000

the thermopile is an analog IR sensor for measuring temperature http://www.farnell.com/datasheets/91976.pdf

Jacob Christ

Tue, 17 Apr 2012 22:32:54 +0000

Hmmm, not much info in that datasheet...

Jacob

scoprire

Wed, 18 Apr 2012 05:46:10 +0000

i know...i hope that someone use this sensor too

scoprire

Fri, 20 Apr 2012 23:17:39 +0000

i connect the sensor with the circuit in attachment and the value that i read is that http://youtu.be/zQwqpBvQ5nk why? thx [attachment=0]resample.jpeg[/attachment]