There is nothing quite like a DIY project that involves both technology and food. It's a combination of playing with toys and then eating which can't be beat! Of course if you suck with technology on this one your food is going to come out crappy. Also, if you suck at cooking... yeah you get my point. And if you don't, your food is going to get ruined! I'm just saying.
Peter Rauch used a proportional-integral-differential (PID) controller that modulates electrical power to a heating element to create a home-built electronic meat smoker. A touch-screen display let him manage the controller set point and control-loop parameters. A J-type thermocouple in the top of the smoker provides a voltage signal so the feedback loop can control the smoker's temperature. A second sensor, which reads meat temperature, is used only for monitoring and alarms. A user can enter a desired meat temperature, and receive an alert via a text message when the temperature reaches a preset value. Additionally, when the temperature reaches this setpoint, the controller can 'hold' the meat at a preset temperature to avoid overcooking it until you can remove it.
Make via Gizmodo