DIY Roast-Meter Color Meter

A community DIY roast color meter project was shared as a way to build a low-cost device for evaluating roast color. The project was described as being made possible by contributors from the Kaffe-Logic Discord community. source

Project Basis

The roast-meter project is based on the SparkFun MAX30101 sensor. The same sensor was described as being present in several color meters, including Roast Vision. source

Parts and Cost

The shared build uses parts from SparkFun, which were described as easy to find online. The approximate total parts cost was given as about ±$100. source

Additional materials mentioned for the build include:

A 3D-printed case, requiring either a 3D printer or access to a 3D printing service. source
Super glue. source
A 72 × 25 × 1 mm microscope glass slide, cut to size with a cutter. source

Guide and Source

The shared guide was reported by the contributor to work well in practice. The project repository is available at:

https://github.com/juztins-lab/roast-meter/ source

Notes

This page records the shared community build information only. Before relying on readings for profile comparison or quality control, users should validate repeatability, sample preparation, calibration approach, and agreement with their own preferred roast color reference.