I've been attempting to replicate the PID control tutorial found here: http://electronoobs.com/eng_arduino_tut24.php
I've made a few small changes - no LCD, no encoder, and I've replaced the 12V heater with a piece of nichrome wire. The rest of the connections are the same.
I think I may be making some sort of rudimentary error when it comes to connecting my power supply. When I connect the positive terminal of my power supply to the wire and the negative terminal to my resistor, the thermocouple reading jumps to >400ºC but the wire does not heat up. When I swap the terminals so that negative is connected to the wire and positive to the resistor the thermocouple reading goes to 0ºC but still the wire does not heat.
If anyone has any insight into what I may be doing wrong, I would greatly appreciate the help!
I'm happy to provide pictures of my breadboard set up if that would be helpful.