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  • Tag Archives geiger counter

  • New geiger counter build

    Posted on July 7, 2012 7:56 pm by Johan

    I’m currently building a GM counter for a friend and was looking for nice, low
    power circuits working on 9V cells.

    I found this circuit which is derivative of Charles Wenzel’s designs:

    http://www.mikrocontroller.net/attachment/103170/Geiger_Hochspannung.png

    Components are fairly basic apart from the HV transistor and zeners. The other
    transistors can be basically any small signal PNP/NPN transistor from the
    junkbox. I used BC547 and BC557 and a MPSA44 HV transistor. Continue reading → Post ID 1068


    📂This entry was posted in Electronica english wetenschap/science 📎and tagged Electronica english geiger counter high voltage radioactivity soldering

  • Easy GM tube connecting and testing

    Posted on March 28, 2012 11:20 pm by Johan

    Need a simple interface for connecting GM tubes to geiger counters? Use  1/4″ /6,35mm TRS sockets and plugs. It’s not what these plugs and sockets were designed for but it works nice. I use the tip as positive, ring as return and sleeve for ground. Two wires are sufficient to connect geiger tubes but the sleeve is connected to the ground of the circuit and to the shield of shielded cabling. You can also solder geiger tubes directly to the plug, I have done this with a SI-29BG tube and it works fine. Continue reading → Post ID 1068


    📂This entry was posted in Electronica english wetenschap/science 📎and tagged english geiger counter radioactiviteit radioactivity

  • Arduino environment monitor

    Posted on February 16, 2012 10:42 pm by Johan

    Above is a picture of my recently (practically ) finished project. It is a sort of weather station which measures light, temperature, relative humidity, atmospheric pressure, and of course radioactivity!

    The core of this setup is the excellent DIY Geiger Counter PCB by [Brohogan]. This kit is a geiger counter circuit combined with a standalone Arduino circuit. Most people buy this kit, connect an LCD and put it in a nice box. Because the Atmega328 pins are broken out via handy pin sockets it is very easy to connect any additional components and/or sensors to this PCB. Continue reading → Post ID 1068


    📂This entry was posted in computers-networking Electronica english Uncategorized wetenschap/science 📎and tagged arduino bash english geiger counter linux radioactivity weather station

  • Arduino/Cacti Geiger counter update

    Posted on September 6, 2011 8:22 pm by Johan

    My online geiger counter which I described earlier has been offline for some time. During that time I experimented with a standalone Arduino with the goal of making a dedicated board for the setup. I have now completed the board shown in the picture below.

    In the picture you can see the HV generator on the top of the board, on the lower left the Arduino standalone parts along with a MAX232 as a level converter for easy serial hookup and on the right two tubes connected in parallel, a SI-29BG (beta and gamma) and a SI-12B for added alpha sensivity. Also shown are the USB>Serial adapter and a separate USB connector to provide 5V to the board. Continue reading → Post ID 1068


    📂This entry was posted in computers-networking english wetenschap/science 📎and tagged arduino cacti english geiger counter radioactiviteit radioactivity

  • Easy and cheap CDV-700 tube adapter

    Posted on April 19, 2011 7:11 pm by Johan

    I own a CDV-700 geiger counter of which the tube stopped working. It turns out that replacement tubes are both hard to find and expensive. The simplest option is to buy the LND 720 which basically is a drop-in replacement that should cost about $100.

    It’s also possible to use cheaper, easier to find tubes with the CDV-700.  I found the following post from radio amateur K0FF on the “Geiger Counter Enthousiasts”  group on Yahoo groups. It describes a simple circuit to adapt tubes of varying voltage to the CDV-700. I built one, and it works! Continue reading → Post ID 1068


    📂This entry was posted in Electronica english wetenschap/science 📎and tagged civil defense Electronica english geiger counter radioactiviteit radioactivity

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