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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 1010

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

Posted on January 14, 2012 4:42 pm by Johan

Just some venting,

Why on earth is every interesting technical discussion forum on Yahoo Groups? I absolutely loathe its design. When requesting the main forum it presents you with unthreaded, ungrouped messages by date. To group messages by thread you have to click a link, and even then you have to click each message separately just to view it. It’s 2012 damnit, stupid threaded message boards should be a thing of the past! Continue reading → Post ID 1010

📂This entry was posted in Electronica english wetenschap/science zendamateur/ham radio 📎and tagged arduino english radioactivity rant usenet yahoo groups
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 1010

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

Posted on April 21, 2011 11:23 pm by Johan

With the developing nuclear disaster in Japan, I discovered that there is lots of money being made selling geiger counters. Prices of geiger counters on Ebay and various other places seem to have tripled instantly.

Well, you could say that’s the free market in action. But it wouldn’t surprise me if prices are driven up by people not actually needing geiger counters but buying them anyway out of fear while they are not likely to experience any effects of the disaster.

Today I saw something much worse, some German on Ebay trying to sell a “geiger counter” which actually is a high range survey meter, a CDV715 according to the picture. Continue reading → Post ID 1010

📂This entry was posted in english skeptisch/sceptical wetenschap/science 📎and tagged english radioactiviteit radioactivity sceptisch
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 1010

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

Arduino environment monitor

Some tech frustrations

Arduino/Cacti Geiger counter update

Opportunism

Easy and cheap CDV-700 tube adapter