Background - I want to read the temperature from my pottery kiln through a Raspberry Pi. I found the Adafruit breakout boards but they only work with type K chips. Tried to remove the type K and swap it with a type R breaking the board in the process. Their board read my type R but output what type K would be reading.
Bought some surface mount to breadboard adapters and soldered in the type R chips, found an article here that comes with a circuit. http://www.allaboutcircuits.com/projects/build-a-thermocouple-amplifier-and-custom-kicad-libraries/
Followed the diagram on my breadboard and tried running it with the Adafruit example program https://github.com/adafruit/Adafruit_Python_MAX31855. This outputs over minus 100c for the reference junction and NAN for thermocouple.
Tried with another found library which gives me 32 and 32 for the thermocouple and reference junction. https://github.com/Tuckie/max31855
Tried following the circuit in the data sheet with no luck either, same readings.
I know very little and battling my way up to something that works so any input would be appreciated.
Bought some surface mount to breadboard adapters and soldered in the type R chips, found an article here that comes with a circuit. http://www.allaboutcircuits.com/projects/build-a-thermocouple-amplifier-and-custom-kicad-libraries/
Followed the diagram on my breadboard and tried running it with the Adafruit example program https://github.com/adafruit/Adafruit_Python_MAX31855. This outputs over minus 100c for the reference junction and NAN for thermocouple.
Tried with another found library which gives me 32 and 32 for the thermocouple and reference junction. https://github.com/Tuckie/max31855
Tried following the circuit in the data sheet with no luck either, same readings.
I know very little and battling my way up to something that works so any input would be appreciated.