My apologies if this is too localized, but I am really in a bind.
I am attempting to amplify the voltage difference (so to be read on an arduino) between two thermocouple's copper wires, as pictured here:
The temperature difference between these two probes is very small, no more than 20 degrees C
I have had little success using both an INA122 and LT1920 on a breadboard to amplify this signal, following the thermocouple schematics in the datasheets.
Is there a simpler amplifier to use for this signal?
For those who might have my problem in the future:
The easiest method of reading these small voltages on an Arduino for someone who might not be adept with analog circuitry is to use a separate ADC.
A great example of interfacing one with an arduino can be found here: http://forums.adafruit.com/viewtopic.php?f=31&t=12269&p=58824