Geiger tube SBM-20: http://www.gstube.com/data/2398/
Pyboard: http://micropython.org
High voltage generator from http://www.mare.ee/indrek/geiger/
Digitization of tube discharges from http://www.techlib.com/science/geiger.html (with one gate of 4093 and 3.3V supply)
Power supply from http://1wt.eu/articles/alix-ups and http://www.mouser.com/ds/2/268/22008a-53656.pdf
Wireless serial port with wixel: http://www.pololu.com/docs/0J46/all
Log device: fram http://www.cypress.com/?docID=50514
Temp & humidity sensor am2302: https://www.sparkfun.com/datasheets/Sensors/Temperature/DHT22.pdf
Buzzer: ZX-27T6A1 at http://dx.com
Micropython card pins used:
Y12 IN/OUT AM2302
Y10 IN TIM2_CH4 GEIGER
Y2 IN Rx POLOLOU
Y11 OUT Power POLOLOU
GND GND
VDD VDD 3.3V
Y3 OUT SCK FRAM
Y4 OUT CS FRAM
Y5 OUT SI FRAM
Y6 IN SO FRAM
Y8 OUT BUZZER
Y9 OUT RELAY
Y1 OUT Tx POLOLOU
X3 FREE For testing
X4 FREE For testing
X5 FREE For testing
Buzzer is activated with programming PWM signal at 3.5Khz.
AM2302 is one wire, Pin has to be changed from output to input.
fram has an SPI interface. It is harcoded in python as individual pins.
The core is the interrupt handler awaken by the discharges of the tube.