The GC/RL Geiger Counter / Radiation Detection and Data Logger Project
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The Geiger Counter / Radiation Logger Project
The nuclear catastrope in Fukushima (and of course Chernobyl, Harrisburgh and so on) made it clear that using radioactive materials for generating energy can and probably will end in a horrible disaster.
Very soon after the first reactor in Fukushima exploded, geigercounters were sold out eveywhere and prices soared to almost ridiculous levels. Although I do not live in or near Japan, I too wanted to have a geiger counter to monitor radioactivity myself, being prepared in the case some nuclear accident should happen in my part of the world (central Europe).
So I started researching for suitable DIY circuits on the net, testing a few of them and as none of them would fit my requirements, I designed my own circuits.

Building a basic counter that clicks is pretty easy, but such circuits will never give you detailed and reliable information on whats really going on.
So the next step is to add a microcontroller and a display that would allow to calculate numerical values, but this would require you to record the measurements by yourself to have an overview of the long-term development of radiation.
So the next logical step was to build a radiation logger device, that would record many thousands of measurements and display them on a computer screen.
While evaluating several solutions for this, I came across a litte microcontroller module called 'Flyport' (see www.openpicus.org), this device would have almost everything that is needed for building data loggers, and it also has a integrated WLan interface, so it would be very easy to make a connection over the internet with a smartphone, tablet or a standard PC to monitor radiation levels.
After some days of experimenting, I had the first version working and started to develop a complete system for long-term logging and monitoring radioactivity with a small, low cost, standalone system.
Well, here it is. The Geiger-Counter Radiation Logger for the OpenPicus Flyport.

It is very well suited for measuring and monitoring radioactivity in your personal environment, especially if you live near a nuclear facility or an area with high natural radon occurence.