I had built a Sous Vide controller using the Adafruit plans and parts. I soon revised it using a hand wired PCB. Since I had used a large solid state relay I thought it might work well for my smoker too.
All I really had to do was change the sensor form a Dallas 18B20 to a thermocouple and add a little more capacity to the SSR output. . The Dallas sensor tops out at about 250 degrees Fahrenheit.
I used a MAX6675 thermocouple module that connects to ta couple of binding posts on the back panel.
My particular smoker is electric and draws about 1500 watts but the controller will work on charcoal fired smokers too. You just use a smaller relay relay to run a squirrel cage fan and motorized damper instead of the big heating element.
I chose pin 5 for the relay output. You can change that in the code…..
RGB backlight positive LCD 16×2 + extras – black on RGB: This is a fancy upgrade to standard 16×2 LCDs, instead of just having blue and white, or red and black, this LCD has black characters on a full color RGB-backlight background! That means you can change the background color to anything you want – red, green, blue, pink, white, purple yellow, teal, salmon, chartreuse, or just leave it off for a neutral background. This LCD is the most daylight readable character LCD we have and is very beautiful and easy to read no matter what color/brighness you have for the backlight. (read more)
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