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My hot air roaster build

I have built a roaster based off an air popper. While there is a possibility to post images here, the limit is 268 kB and after several attempts with online compressors and making the images smaller in paint I quit.

For anyone interested the pics and some explanation could be viewed at
Rostikalsongen attached the following images:
roaster2_3.jpg complete_1.jpg roaster7_2.jpg roaster5_3.jpg roaster6_2.jpg roaster3_3.jpg

Edited by JackH on 09/07/2016 5:04 PM
Lots of views but no responses, comments.

I think you did a great job on the roaster.

KKTO Roaster.
I saw it, liked it, but I don't know enough to comment, sorry.
Backwoods Roaster
"I wish I could taste as well as I wish I could roast."

As Abraham Lincoln said "Do not trust everything you read on the internet".


For anyone interested the pics and some explanation could be viewed at

Hello and welcome to the forums welcome2

I did a popper mod recently too and I really like yours. I used the SSR approach controlled by a computer a long time ago as part of a control system for my wife's ceramics kilns and it is certainly effective. I like your use of a temperature controller with the SSR. The coils, if run in parallel, only draw around 13.4A at 120VAC, so it's surprising the 20A SSR didn't work OK. On the mod I did I elected to use a pulse width modulator capable of handling the load involved (SMAKNŽ AC 0-220V 20A Pulse Width Modulator PWM Electric Motor Speed Controller Max 4000W by SMAKN $16.66 Prime) and have had no issues in that regard.)

I really like your idea of having a main power supply and then a second on-off for the heating coils. I did the same to prevent heating without cooling from the fan since that will almost melt vital components as I found out by ruining two poppers (but none since I made it idiot proof :).

I've found that having limited control of the fan speed can be helpful in fine tuning rate of temperture rise using the PWM but often I don't use it, and the SSR approach may make it easier to control temperature especially if you have PID.

I hope you continue to add to your description once you get your new SSR. Maybe consider posting a video on YouTube and providing a link here.

Great job, and welcome to forum
So many beans; so little time....
super job on this roaster...

thanks for posting.


Thanks to ChicagoJohn for re-sizing the photos!

Size scaling (800 pixels) and image quality (50%) had to be adjusted to get them posted.

KKTO Roaster.
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