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Posts Tagged ‘Geiger counter’

Geiger counter with SBM20 tube

Friday, August 14th, 2015

j3tstream writes: 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 &...

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Posted in hacks | No Comments »

Geiger counter with SI-3BG Russian tube

Monday, January 14th, 2013

Erdabyz designed a Geiger counter around a SI-3BG Geiger Muller tube. It uses a PIC16F1508 to read the radiation level, and passes it to a computer via a FT232R USB-to-Serial IC. Timer 1 uses a secondary xtal oscillator at 32,768kHz as clock source. Every 2 seconds the timer overflows. Output...

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29C3: Safecast – DIY radiation monitoring project

Sunday, December 30th, 2012

In this presentation from the ongoing 29C3 Chaos Communications Conference in Hamburg, Germany, Sean Bonner shares his experiences overcoming technical and bureaucratic obstacles while attempting radiation monitoring in the wake of the March, 2012 Fukushima Dai-Ichi nuclear power plant disaster. His observations led to the development of the Safecast DIY...

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Posted in DIY, sensors, Videos | 3 Comments »

DIY Geiger counter

Saturday, May 7th, 2011

Rubi shared his Geiger counter based on a Russian SMB-20 tube in the project log forum. Thanks Rubi!

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Posted in project logs | 1 Comment »

Recent Comments

  • Pekka Akselin: This is ridiculous!? :-) We are back at 256(!) byte EPROMs that needed multiple, a handful, of voltages to run! :-(
  • KH: Let's try a back-of-envelope calc balancing energies. From MCP1700 datasheet, there are graphs for a 200mA load step. Estimate the energy shortfall as 12uJ. Say...
  • Daniel: It's been a week and my comment is still awaiting moderation. Apparently the CIA doesn't want their involvement known?
  • KH: Agree, so okay, I guess he must have learned from somewhere. 100nF and 1000uF is so far apart, that was jarring; it's more magic incantation...
  • Max: I have a suspicion the hefty electrolytic cap might be some sort of cargo cult carry-over from other RF-based projects - for instance, I've seen...