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Electronics => Beginners => Topic started by: tonysallen on November 26, 2010, 10:25:09 pm

Title: ZTP-135SR and pic16f1933
Post by: tonysallen on November 26, 2010, 10:25:09 pm
hi all. this is my first post here so be nice or not you choice. OK here is my question. i have a ZTP-135SR GE and i was wondering how i can get a signal out to feed into the ADC on the pic. there pdf on the part does not say anything about powering the part of where to take reading from. if anyone could help or suggest a more useful part that does the same job i would be great full.
im trying to read the temp of a surface about 10cm below the IR sensor
Title: Re: ZTP-135SR and pic16f1933
Post by: armandas on November 26, 2010, 10:58:05 pm
The pinout (see attached) as well as other data is provided in the datasheet. You don't need to power the device, it will produce voltage corresponding to the temperature. There is also a thermistor for compensation/reference.

As for reading the voltage, you might need to amplify the signal first.

Start by reading here: http://en.wikipedia.org/wiki/Thermopile (http://en.wikipedia.org/wiki/Thermopile)
Title: Re: ZTP-135SR and pic16f1933
Post by: johnmx on November 27, 2010, 12:04:33 am
Tony Sallen, check this application note (schematic included):

http://www.thermometrics.com/assets/images/thermopile.pdf (http://www.thermometrics.com/assets/images/thermopile.pdf)
Title: Re: ZTP-135SR and pic16f1933
Post by: tonysallen on November 27, 2010, 01:17:53 pm
thanks a lot guys that was a big help. will make that circuit next week and see how it goes. :)