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A project log for OpenRad: A Geiger Counter using SBM-20 and ESP32

A simple radiation monitoring solution powered by the SBM-20 GM tube and TTGO ESP32 microcontroller.

omar-khorshidOmar Khorshid 07/23/2025 at 18:520 Comments

We put together a simple 3D printed case to hold everything in place and protect the electronics. It’s got cutouts for ports, buttons, and the screen, and it snaps together easily. 

Files are included here if you want to print your own.

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