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by cpenner461 4503 days ago
I've been roasting my own beans off and on for several years, the quality is far better than anything you can get at the supermarket and even most coffee shops (unless they are doing their own roasting). Buying green beans is quite a bit cheaper as well, so you get the best coffee possible at the best price - win win!

The air popper in the article is a popular low cost way to get into home roasting, but I started with just a heavy pot and lots of stirring, hard to keep things even. After a short while I built something pretty close to this: http://biobug.org/coffee/turbo-crazy/ Still a lot cheaper than something like the Behmor, but able to easily roast 1/2 lb at a time.

What I love the most about this is the analysis of the roast with opencv, will definitely be trying that for my next roast!

3 comments

As another home roaster, I often see people talking about how much cheaper buying green coffee beans is vs. buying roasted beans. I thought the same before I really got into home roasting.

My perspective is that, if you only consider "price" as your differentiator, yes the green coffee beans are cheaper. If you look at the Sweet Maria's site, they are selling just-roasted Rwandan coffee for $15 per pound [0]. They sell the exact same green beans for $6.35 per pound [1]. But that's deceptive because (a) Sweet Maria's has a $15 minimum purchase (so you can't buy just 1lb), and (2) the $15 roasted coffee includes shipping. I just checked and, to ship 3lbs of coffee (minimum order of green), would cost $11.30. So my "out the door" price for 3lbs of green is $30 which makes it $10 per pound. If you compare that to the $15 "out the door" price for their roasted, I'm saving $5 per pound. Sweet.

But how long will it take you to roast those beans? Two adults probably go through one pound a week. So you saved $5 by buying online, but it takes me about an hour a week to roast a pound of coffee using my Behmor. Even if it only took me 30 minutes, would I trade 30 minutes of my leisure time for $5? That's the part that people don't consider enough, I think. At this point in my life, I am enjoying trying all the different coffees and learning about the various roasts - so the Behmor stays for now. In five years though once I've learned all that I can learn and have become more "refined" in my tastes", I wonder though whether I'll still want to be spending an hour a week roasting beans...

[0] http://www.sweetmarias.com/sweetmarias/roasted-coffee.html

[1] http://www.sweetmarias.com/sweetmarias/rwanda-kivu-kanzu-1-l...

author here - boyter informed me that this was front page on HN.

I'm actually seriously contemplating building a rig. I have 3 spare flashes for my camera and my table is a frosted glass table. It should be able to give uniform lighting to the beans for visual analysis.

Nice. Trying to think through that - would you be shooting the flash through the frosted glass to diffuse the light evenly?
Yup. And possibly in a product tent or something. How much did it cost for your to build your version of the Turbo Crazy
It's been a few years but I think it was on the order of $100-150.
Do you know any good resources for buying raw beans online?
sweetmarias.com has a huge variety of beans and many pages of how-to with photos.
Yes - Sweet Marias is awesome. Their sampler packs are an easy to get started. I usually peruse their latest arrivals and pick a pound or two of several different varieties, based on their cupping notes to get an idea of the expected flavor profile. E.g.

>> There's a maltiness in darker roasts, that is like sugar in the raw. The cup is smooth, sweet, and with a touch of malic tartness in the acidity. There is a lactic quality too that reminds me of fresh cream caramel, which plays off flavors of apple juice nicely. At Full City roasts have a juiciness to them with a slight tart note, like cranberry grape juice. The mouthfeel is silky and with a finishing flavor of sweet cocoa. City+ to Full City+.

EDIT: formatting