Geiger counter with SBM20 tube

https://www.electronics-lab.com/geiger-counter-with-sbm20-tube/

by weirdlab.fr: I “rebuild” my Geiger counter, the SBM-20 tube was initially inside the box, i have put this one inside a 32mm diam plastic tube, for more convenience, wired through a XLR3 cable. This counter is from “Electronique-Pratique” n°368, a french electronic magazine. Shem, pcb, and PIC hex & C source code available. Geiger counter […]