Hi,
I have found in the market a specific MAX6675, that is used to read and adapt the signal of a thermocouple type K, but I'm not sure if I can use this same device to read a signal of a thermocouple tye J.
In case this device is not able to read a Type J, I want to know which type of program can I use in the Arduino to read this signal, after been already adapated through an operacional amplifier circuit.
Hi,
There are thermocouple interface chips for several different types of thermocouples.
Here is one that can do different type of thermocouples.]
Some information on using thermocouples with Arduino is HERE