The DIY Coffee Roaster, roasting from start to finish

[@georgewelker853]

That’s WAY WAY More complex than I’m willing to build!!! I’m amazed that you aren’t selling those

[@jasonyannuccelli2499]

Man that’s a neat and compact unit. Great work 👍

[@TampedOnSquid]

i watched a video a guy said he had a diy air roaster and then he bought one of those Artisan air roasters and I was thinking wait. If I already had the air roaster heat gun setup and roasted 80 pounds on it then what you have here would be the logical next step, love how my autistic brain can design things and then scour the internet to see if they exist yet and it does! you have done it! awesome design. In my silly brain I was like hmm, I wonder if this will work, nah that's crazy, no look you've done it it can work. I saw the new Tornado or Typhoon Air Roasters for 3kg and was like wait. There's got to be a super easy way to do this. And you've done it. Bravo.

[@cony__gamer718]

How do you do that?

[@audrius.l4677]

What fan guys you can recommend? thanks

[@novrain62]

Damn, why Lord didn't you give me 5% of this man's brain, I need this roaster :D

[@MarcoGualtieri]

hi! could you give a super brief outline of what is being used here besides the blower? just the main components at least? thank you

[@wojwa]

Hi, to mention the components briefly: a blower, which is detailed in an earlier comment, 25 mm PVC pipe to direct the air flow, a heating element from a heat gun, glass container, a cyclone, ESP32, switches, wires, 4x20 LCD display, temperature sensor along with an IC, two channel light dimmer controller, and finally a phone. I think that is everything.

[@ychsin8295]

Can I use ordinary glass for this glass tube? Or do I have to use high borosilicate glass?

[@wojwa]

I used regular glass, but I cannot guarantee that every glass will work. I guess you'll have to try it yourself.

[@ychsin8295]

@@wojwa Thank you very much for your sharing and reply

[@OKFrax-ys2op]

How can you tell when 1st crack happens?

[@wojwa]

If you listen carefully, you can hear the first crack, however with some coffees it is almost inaudible. That is why in some other comment I recommended using some less powerful and more quiet blower motor. I think isolating the motor with some additional foam and just leaving open only the air intake and outlet could yield good results.

[@OKFrax-ys2op]

@@wojwa congrats it’s a very good build, yeah it be interesting to upscale it! : )

[@OKFrax-ys2op]

Do you have any plans that you could share or sell? Including electrical drawings too? Thanks

[@wojwa]

@@OKFrax-ys2op I haven't really thought about it, I wasn't expecting there would be anyone interested :)

[@tmushy]

@@wojwa We are all so very interested! Maybe a parts list ?

[@smark9801]

Hi, where did you get pats of chaff collecter

[@wojwa]

I've updated the video description with the link to the chaff collector there. I actually bought 2 such collectors. The one on the right is complete, and the one on the left is the cut-off top part. That was not necessary, but it looks nice and adds to the symmetry.

[@JesemanuelRamirez]

Great job, but why the Bluetooth controls? Not dissing what you did, just curiosity. Wouldn’t a knob be easier than programming some software?

[@wojwa]

Yes, that would be easier. But when it's winter, it's better to stay inside and control the roaster through the window 😄 Plus, I like the charts.

[@JesemanuelRamirez]

@@wojwa that makes sense, I live in the tropics so that would be something I would overlook. Thanks for the reply!

[@montanausa329]

You are the goat! Make me 2 😊😊

[@wojwa]

Thanks, your comment made me genuinely laugh out loud! :D BTW. I'm making an updated version of this roaster, you can see it here: kzbin.info/www/bejne/jIjNpZtme7-drtU

[@mykeenteria1876]

How did you do that roast log

[@wojwa]

Hi, every second the roaster reports the data to the phone, and the phone displays that data on the chart.

[@jjjj3903]

It looks great!!. Do you have a tutorial or guide on how to build one?

[@wojwa]

I'm currently thinking about making a video series about how to make a complete roaster from scratch.

[@danielarthurdomingo8912]

@@wojwa Please! Make a video for the complete setup!

[@wojwa]

Just to let you know, I have now started a new series of videos where I am building a steampunk version of the coffee roaster! Please see my other videos and I'm also planning to post updates more often.

[@kevinalderton1225]

How do you get the beans out?

[@wojwa]

In the glass vessel there is a steel part with a steel mesh at the bottom. Because of the conical shape of the bottom of the glass vessel I just take the top off, take the glass vessel and pour out the beans.

[@dosentekim]

Nice

[@เอกวัฒน์ศิริวัฒน์โยธิน]

The principle seems to be taken from a corn popper.

[@seankang771]

Thank u for your video. Can you share how to make android application?

[@wojwa]

Hi Sean, earlier I was planning to make a video about that, but on the second thought I figured it wouldn't be too exciting. In short, find an example on the internet with the basic connection and exchange of a few bytes, because that's exactly what is happening, and then you can build upon that. So the phone is sending what the user pressed, and the coffee roaster is sending all the sensor data every second, time, temperature, heater and blower values. And then you can process all that data, display it, draw charts, etc.

[@fabioalves5815]

Very good.

[@ffre4k]

Cześć, jak projekt? Coś zmieniałeś? Sam właśnie kończę budowę, wpadaj na grupe na fb palenie kawy w domu :)

[@wojwa]

Thank you very much for the invitation, however I'm not using Facebook... I have not done any changes to the roaster, this is what I've been using for 10 months now and it works great in all conditions, high humidity, low humidity, summer (+35 deg. C), winter (-17 deg. C), although the LCD refused to display anything at -17 deg. C :)

[@elbertmoria9299]

what blower did you use?

[@wojwa]

I guess you'd like to know what blower I used and if I'd recommend it. 1. The blower is this Intex Quick-fill AC 66624 pump. 2. In general it's serving its purpose, but right now I think it's too powerful, I'm never going over 50% of power. And it's way too loud. I'd recommend using something less powerful and not so loud.

[@elbertmoria9299]

@@wojwa I think those dc airbed blower pumps are not powerful enough, but everyone uses them.

[@sotirigeorgas7281]

@@wojwa I looked into that blower that you mentioned online and could’t find any info on CFM, do you have any idea ? In your experience what would be suitable to loft 250g of beans. Thanks

[@wojwa]

@@sotirigeorgas7281 Hi, what I've found is that Intex pump produces maximum 38.9 CFM. If that is true, with under 50% of power I could lift 330 g of green beans. Later the coffee loses weight, so I was reducing the power to 40%. Now, I cannot recommend anything else, because this was the first one that worked for me. I tried 12V and 24V ones, but they were just too weak. My guess is to lift 250 g of green beans you'd need about 25 CFM, but there are a lot of other variables, e.g. diameter of the outlet and the diameter of the coffee container, and also how honest the manufacturer is about the CFM value, so you'd have to see what works for you.

[@teela-audiophile7864]

physical design is not good

[@wojwa]

LOL, that's actually quite funny. Looking forward to seeing your design :)

[@teela-audiophile7864]

@@wojwa Watch the video I just posted, you will understand better about physical movement

[@teela-audiophile7864]

@@wojwa kzbin.infoV2e5SkJ03m8?feature=share

[@wojwa]

@@teela-audiophile7864 I'm not sure which video you're referring to. I found a short video where some beans are roasted, but I cannot see the whole machine there. Also, how much coffee is in that container? It doesn't look like a lot.

[@teela-audiophile7864]

@@wojwa The technique of roasting coffee is very difficult requiring you to calculate uniform movements and absorb heat I am building it