Note: A guest article by Davis Miller. More details about him after the post.
Deja Brew: The feeling that you’ve had this coffee before. – Author Unknown.
Are you a coffee aficionado and a Linux geek? Then, you got some awesome treat ahead!
Many coffee drinkers find that coffee taste much better when done at home, but many of them will come across that an actual coffee roasting machine may be out of their budget.
One gentleman, Andrew Tridgell, wanted to put his own twist on the ‘Corretto’ roaster. For his coffee roaster, however, he wanted to use a computer to control the required power. His solution involved a Linux laptop and a lot of intelligence to make his own coffee roaster.
Required: A Corretto roaster, a thermocouple, and a Linux powered laptop.
The Corretto roaster consists of a bread machine, and a heat gun. The bread maker is the best choice for a coffee roaster for two very important factors: a built in stirrer (metal is a better choice for it won’t melt), and the ability to hold a high amount of heat. A heat gun is used because it can reach the proper temperature for roasting the beans (which is 210 degrees). Tridgell added in a Linux (Can’t go wrong with penguin powered coffee!) and a thermocouple to help control the temperature. For your information, the original Corretto roaster used sound of the beans cracking (about 2-4 sets of cracks) to tell when the beans were properly roasted.
A hole was drilled into the bread machine for the thermocouple to reach the beans so it would be possible to record the temperature and keep a recorded chart for indicating when the beans are done. The heat gun was positioned above the bread machine, pointed down towards the beans. With the help of Paul Mackerras, they connected a custom circuit to a power control device. He connected a serial port to his laptop, which gave him control of the power level of the heat gun.
He needed a system to help track the time and temperature of the beans while they roast, which he named pyRoast, inspired so by CoffeeSnobs. pyRoast, a python application act as a graph for time, temperature, and which crack level the beans are in.
pyRoast allows the roaster to keep track of when the beans reach any temperature, and allows the roaster to keep an estimated time for when the beans will be done. The original design was used to tell when the first crack, second crack, and the unload process was ready. The computer allows the roaster to save time and helps to plan in advance how long they can roast their patches to keep them at their freshest.
With the pyRoast, the roaster can also upload their progress to CoffeeSnobs and give details on what they did to get the ending outcome of the roast. This data is also open for others to test, critique, and copy. It is a great way for coffee lovers to calculate how to get the best brew from their coffee beans, while putting their own twist on the roasting process.
Here’s an elaborate video demo (runs about 45 minutes) by founder Andrew Tridgell about building a Linux powered coffee roaster and explanation of how the various pieces were put together.
If you can’t watch the video, here’s the direct link.
A cup of coffee – real coffee – home-browned, home ground, home made, that comes to you dark as a hazel-eye, but changes to a golden bronze as you temper it with cream that never cheated, but was real cream from its birth, thick, tenderly yellow, perfectly sweet, neither lumpy nor frothing on the Java: such a cup of coffee is a match for twenty blue devils and will exorcise them all. – Henry Ward Beecher
The design is simple, and easy to use, so unless there is some intimidation on roasting your own coffee without a name brand roaster, using a Corretto roaster is great for any coffee lover. The Linux laptop along with the addition of handy application is great for any geek/tech person who loves taking notes and figuring the cool process for creating the best product. Now it’s time to enjoy your cup of homemade coffee!
What do you think about this DIY (Do it yourself) Linux powered coffee roaster? Would you like to make one? Let’s discuss about it in the comments section below.
Author name: Davis Miller
About: Davis is a professional and powerful writer who loves to dig everything about new technology. Visit his site for 247 support experts.
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Tags: build coffee roaster, coffee aficionado, coffee roaster, coffee roaster app, coffee roasting, coffee roasting machine, Corretto roaster, fresh copy roaster, Geeky, home coffee roaster, homemade coffee, Linux, Linux coffee roaster, Linux geek
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