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A DIY Digital Meat Thermometer with Predictive Filter?

June 15, 2009 by · Leave a Comment 

systemontable_t We have certainly seen high tech in BBQ the last few years.

With the Digi-Q II, the FEC 100, the Therma-pen, and the list goes on and on. Well, I received this email today from Humberto Evans with nerdkits.com regarding a DIY project that is near and dear to all of our hearts.. A DIY Meat Thermometer with Predictive Filter! uh… ok!  I get it, I think.

Humberto Evans and his partner Mike Robbins, both MIT Grads create a video and web page that tells you how to do it. I will let Humberto’s own words explain this for you, and be sure to check out the web page at http://www.nerdkits.com/videos/meat_thermometer/

From Humberto Evans:
Even though cooking is an elegant art form, the at-home chef often has a number of fancy gadgets. From counter top grills to USB coolers, high end electronics have made themselves available in most aspects of modern food preparation and enjoyment. In keeping with our DIY spirit, and with Father’s Day and July 4th grilling right around the corner, we decided to build a DIY Digital Meat Thermometer using a temperature sensor, an LCD, and a microcontroller. To our delight, getting this project to work well required some interesting bits of engineering including advanced signal processing.

In this video tutorial, we outline the process for building the DIY Digital Meat Thermometer. In order to speed up the measured reading, we estimate what the transfer function of the system is and use a predictive filter to “guess” what the actual temperature is at the tip of our probe. The concepts, and the some of the intuition behind it, are presented in our video tutorial. The meat thermometer can be used with a computer to give a live temperature graph, or be used with just the LCD. Whether it’s a fathers day gift, or just a fun weekend project, this little gadget is sure to draw some attention at the next family cookout.”

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