After testing the prototype and making some minor corrections, we have released the KiCad sources and BOM for version 0.9. Bear in mind it is still a very early version of the detector, suitable for tinkerers only! Here is the link to our GitHub repository:

https://github.com/CarlosGS/open-radiation-detector

We are already working in the next version of the detector, one that supports the buzzer and a row of LEDs that represent radiation intensity with a scale. (a strip will be much easier to read than a single led's brightness gradient).

I want to take this opportunity to thank Hackaday for promoting the creation of open source projects. The Hackaday Prize has been the biggest motivation for me to advance this project, document it and finally release it. I really hope this project can help to lower the cost and facilitate the detection of radiation sources worldwide.

I also want to thank the Grupo de Neurocomputación Biológica at Universidad Autónoma de Madrid for providing the material resources to create the prototypes, which have accelerated the project a lot.

Finally, the project has reached a point where the power of the community will help take this project to the next level. Did you find the project interesting? Do you have any suggestions to improve detection effectiveness? Please share your thoughts in the comments!