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Entry  Wed Aug 16 16:05:53 2017, Kira, Update, PEM, temp sensor PCB IMG_20170816_154514.jpgIMG_20170816_154541.jpg
    Reply  Thu Aug 17 10:41:58 2017, Kira, Update, PEM, temp sensor PCB IMG_20170817_095917.jpg
       Reply  Mon Aug 21 13:07:08 2017, Kira, Update, PEM, temp sensor PCB IMG_20170821_124121.jpgIMG_20170821_124429~2.jpgIMG_20170821_124108.jpg
Message ID: 13214     Entry time: Wed Aug 16 16:05:53 2017     Reply to this: 13224
Author: Kira 
Type: Update 
Category: PEM 
Subject: temp sensor PCB 

Tried taking the circuit from the breadboard to the PCB. I attached all the components to adapters that would allow them to be connected to the PCB. From the first picture, the first component is AD586, the second is AD590, and the third is LT1012, along with a resistor across it. I then soldered the connections between the components, as can be seen in the second picture. When I tested out this version of the circuit by hooking it up to the DC source, I got a reading of ~-15V. I will have to check all the connections to make sure there is contact where there should be one, and no contact where there shouldn't be. I had issues attaching the tiny AD590 and LT1012 to its adaptor, so the issue may lie there as well. I'll also check that each component is in working order as well.

Once I figure out where my error is, my plan is to build two more of these and place a metal object such that it contacts only the surface of the AD590s. This would allow me to compare the three values to the actual temperature of the metal, which would then tell me how accurate this setup is.

Note on the resistor: I measured all the resistors and chose three that had exactly 10.00k Ohm. The voltage detected is dependent on the resistor, so if we are to take three identical copies, I ensured that there would be no error due to the resistors being a little different.

Attachment 1: IMG_20170816_154514.jpg  3.623 MB  | Hide | Hide all
Attachment 2: IMG_20170816_154541.jpg  2.069 MB  | Hide | Hide all
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