All posts filed under experiment

Tiny Cheap Fluid Bed Roaster update 8 Feb 2017

Tije de Jong made a first housing for the Tiny Cheap Fluid Bed Roaster. He also made a part that improves the movement of coffee beans inside the roast chamber. This improvement is not finished yet but it already makes a slightly larger batch size possible (310 vs 250 grams). Tije also made an addition to the chaff collector that prevents beans from escaping out …

Tiny cheap fluid bed: chaff collector and more testing

Last week we did some new tests with our DIY Tiny fluid bed roaster. There were two things to test. First we wanted to test the Chaff collector that was made by Tije. Secondly we wanted to configure the PID of the TC4/ Arduino to make it accurately execute pre defined roast profiles. Tije’s chaff collector During our previous tests the tiny fluid bed roaster …

Tiny Fluid Bed Roaster update

(movie by Frans Goddijn) Last week we updated the Arduino software of our air roaster prototype. Tije fixed the new safety switch that I brought along. In case of software failure, you want to switch off the heater and keep the blower active in order to cool the beans and prevent overheating of the blower and heating element. The switch bypasses the relays that are …

Affordable fluid bed roaster

Tije de Jong, Frans Goddijn and I are thinking of a small simple affordable-for-all fluid bed home roaster for coffee. We use some hard- and software idea’s from the Roastuino project. Today we installed the electronics and tested several configurations. The results are promising. To be continued!

Communicating roast color values

Many coffee roasters use roast color meters to monitor the quality and consistency of their roasts. Furthermore, calibrated roast color can be used for productive communication between roasters and coffee traders. For instance, a trader could provide a target roast color for a specific coffee. Also, coffee roasters around the world could share information about the roast color they find best for certain beans.

The Eureka E65 Super Jolly

A week ago I had troubles with my Eureka E65 grinder. No matter what I did, I was not happy with my espresso shots. I opened the machine and the burrs seemed to be a little dull. Should I buy new Eureka burrs? There was also another possibility.

The instant Nespresso experiment

instant nespresso experiment

  Nespresso coffee extracts better on low end equipment than most high quality coffee in combination with high end brewing equipment. What’s going on? Is¬†Nespresso adding instant coffee to the Nespresso cups to increase the extraction yield?