Geiger counter with SBM20 tube

j3tstream      http://www.weirdlab.fr  
6534
Project non tested

general_vue2-675x1024

 

I “rebuild” my Geiger counter, the SBM-20 tube was initially inside the box, so, i have put this one inside a 32mm diam plastic tube, for more convenience, wired through a XLR3 cable.

The LCD display alternatively, the “count per minutes” and result on: milli Sievert/year or nano Sievert/hour, you can switch off/on the buzzer, also 3 modes on measure are available, 15/30/120 secs.

This counter is from “Electronique-Pratique” n°368, a French electronic magazine. Shem, pcb, and PIC hex & C source code available. (Microchip compiler C18 v2.40/MPLAB 8.4)

Schematic

SBM20_Shema

Photos

connectique

general_vue

tube_vue

PCB

Download

6 Response on “Geiger counter with SBM20 tube

    1. For this project a plastic or metallic case can be used. We are sorry we don’t have any 3d file for a case.

    1. According to the author the code is tested and working properly. Please be sure to program and verify your PIC microcontroller.

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