Most of us simply can’t afford an industrial reflow oven and this pain was also felt by the folks over at Rocket Scream Electronics. So armed with an idea and some help from the Adafruit Reflowduino sample code, the Reflow Oven Controller Shield was born. The shield is based off the familiar MAX6675 Thermocouple Amplifier and the PID library written by Brett Beauregard.
Toss in a few solid sate relays (SSR) and a K-Type Thermocouple, like the ones Adafruit has here, and your good to go. I like the idea of a standalone PID controller as it’s one less PC controlled device to worry about.