Geiger Counter (Slightly Less Old-School)
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Project description
We've revised a few layouts and footprints with this version of the Geiger counter, but it's essentially the same as the last revision. This is a USB powered Geiger Counter equipped with an ATMega328 that can be programmed in circuit using one of the programmers below. Simply plug the unit into USB (make sure you have installed), open a terminal program to the correct COM port at 9600bps, and you will see random bits being generated from the random . Each bit generated (actually an ASCII byte, 0 or 1) represents an actual event in the tube in real-time, so the output can be used to deduce CPM or what ever units you need. Here at SparkFun, on average, we get about 25 counts a minute.
Check out the random number generating Geiger counter for more information.
Project description, more information and ordering can be found at https://www.sparkfun.com/products/9848
Firmware - unit ships with v12: https://github.com/a1ronzo/SparkFun-Geiger-Counter/commits/master
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