I am relatively new to the Arduino world. Currently, have a type K thermocouple attached to a 3D printer extruder I purchased (Mk7 Extruder) and I wish to create a temperature controller for it (without purchasing one). I have read that the voltage output of the thermocouple will be too small for the Arduino to read, thus an amp is needed. I was looking into an op amp, however I am not sure exactly how I would implement it and set up the circuit on my breadboard. After getting a temperature reading I would then like to implement a PID controller.
I did see this: https://www.sparkfun.com/products/306
However, I would like to keep it simpler using an op amp as below if possible:https://www.sparkfun.com/products/9456
If anyone could point me in the right direction I would greatly appreciate it!