When the compiled Blink sketch runs on your Arduino, it runs setup() first, setting up the hardware, then it runs loop() over and over forever. In the Blink example, loop() simply turns the pin on ...

[Electronoob] has a good tutorial about how to pull this off with an Arduino. You can also see a video, below. The demo uses a 3D printer hot end, a thermocouple, a MAX6675 that reads the ...