we build a radiation detector by the recipe from case pyhaejoki http://casepyhajoki.info/en/case-pyhajoen-sateilymittarin-rakennusopas-saatavilla/
and afterwards we went into signal cooking, testing different methods for the reception of chance.
the first sample: first-sample-of-geiger-detector
this is a graphical print of the signal: every peak is a random event
however, we went on with different methods of digital signal processing to be able to convert the random event in digital numbers. we used interrupts, analog voltage in, digital high low as input signal. beside the detection of the peaks, there was an interesting method found on http://www.fourmilab.ch/hotbits/how3.html, where they introduce pair 2 pair measurement.
this measurement method seems pretty obvious, instead of measure the time gaps between every peak, means 1-2 and 2-3 there is a need to detach the events, even they are all considered as random, from each other to prevent any kind of connection. you can easily see the difference of the random patterns with your eyes and without using any kind of statistical method firsthand.
here are some examples:
using interrupt: fail
10010010111100010000100011000110001100011000110001100011000011000110001010001100011010
00101100011100011000100100011000110001011000110010111100010000100011000110001100011000
11000110001100001100011000101000110001101000101100011100011000100100011000110001011000
11001011110001000010001100011000110001100011000110001100001100011000101000110001100011
00011001000111000110000100010100011000011000101000110001011100010100011000101000101000
10100011001011100010100011000101000111000101000011000101100011001010010110001000111000
using analog in with 1-2 2-3 pair measurement: will probably fail, but we take the sampling for statistical tests.
11011001000010101011010101110110011010101011001000111011001000101010001010100101110100
11001110011001101100100110110110111001011001010101101011011011101001010101010010011010
10111010101010001111101010001101001011001011100100111001001110011010100101110011110001
00010101101101010010101010110010100100101010101001100111011011001100110110101001101000
10100100110101011001100001100010011010110101110011010110101010110011110101010101110110
01011010011010110111001101010101010011010011011011101010011101010101110001101001101101
useing digital high with 1-2 3-4 pair measurement: -> goes into statistics after longterm sampling
00101110110010110111110101001001110101010101101001101010101101001010101101111010011110
00010001001000100100101001001001000001001100101110110010110111110101001001110101010101
01001101010101101001010101101111010011110000100010010001001000001011111010000011110001
11001000011001000110010011011110101000110111000110010100100110011000010101101011011000
11011010101010001010010100111000011001011101111100110101000101100001100001111001000001
10100111011000000111100100010111100100001110100011011001010110101000010001111011100000
the first sample: first-sample-of-geiger-detector
this is a graphical print of the signal: every peak is a random event
however, we went on with different methods of digital signal processing to be able to convert the random event in digital numbers. we used interrupts, analog voltage in, digital high low as input signal. beside the detection of the peaks, there was an interesting method found on http://www.fourmilab.ch/hotbits/how3.html, where they introduce pair 2 pair measurement.
this measurement method seems pretty obvious, instead of measure the time gaps between every peak, means 1-2 and 2-3 there is a need to detach the events, even they are all considered as random, from each other to prevent any kind of connection. you can easily see the difference of the random patterns with your eyes and without using any kind of statistical method firsthand.
here are some examples:
using interrupt: fail