Friday, July 10, 2015

DIY PID Controller for BBQ Smoker

 A good BBQ smoker requires the ability to maintain a constant temperature almost like an oven. Some of the best smokers are insulated and able to be set at a specific temperature. My smoker is a gas smoker that is not insulated, so it loses temperature and the temperature is very uneven. I plan on building my own smoker in the future, but for now I made a temperature controlled electric heating element that works almost like and oven.

I built this device using a PID controller that I bought online. Since I am using this outside, I had to make it weather proof. The device is fully sealed and safe from rain water damage.

The way it works is by setting a temperature on the device. If the device senses that the temperature probe is below the desired temperature it triggers a relay to power a 110V outlet. I use a electric heating element that I plug into the 110V outlet. The outlet is triggered on and off until the desired temperature can be kept constant. I also installed an audio alarm that sounds when the temperature gets higher than my desired temperature.

Here you can see all of the electronics and required wiring that went into the construction.

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