Coffee drinkers wishing they could roast their coffee may be interested in a project posted by Elliot Williams on the Hackaday website. Elliot loves roasting his coffee and has built a DIY low-cost coffee roaster using a popcorn popper that he has amazingly transformed into a desktop coffee roaster.
Elliott uses a custom-built development board which he originally designed and constructed for a class in AVR programming he held to control the roasting process. But the coffee roaster can as easily be controlled using an Arduino development board and a little programming. Full instructions on how to create your very own DIY low-cost coffee roaster have been kindly published on the Hackaday website.
As the roasting process takes place data is echoed out the serial line as well as reflected in the LEDs allowing you to constantly monitor the process making sure that your coffee is perfectly roasted depending on your preferences and coffee choice. Elliott says that once you have full control of the roaster, you can “really start to geek out over the finer points of roasting”. For example, he says that his routine “ramps up with both motor and heater on full until a measured 120°C and then holds there by cycling the heater for two minutes”.
As connoisseur coffee drinkers will know different coffee beans have different moisture content, and different temperature fluctuations can be adjusted within the roaster depending on the final roast required. For full instructions on how to build your very own DIY coffee roaster from an old popcorn popper jump over to the Hackaday website, where Elliott also provides details on how to perfectly roast your coffee beans when the project is complete.
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