Build a Controllable Coffee Roaster from an Air Popcorn Popper

I have a passion for coffee.  I also have a passion for electrical engineering.  Why not combine them? This Instructable describes how I transformed a hot air popcorn popper into a completely controllable coffee roaster!  Follow these instructions to re-purpose and hack your West Bend Poppery Popcorn Popper into this coffee roaster! ———————————————————————————————– The extraction …

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