http://www.rhelectronics.net/store/how-to-select-diy-geiger-counter-guide Want to buy a Geiger counter kit from RH Electronics, but don’t know what to choose? This short article should help you to select the kit model from our stock. It also has several general answers for the questions people usually asking before they buying a Geiger counter.
We released LCD Shield with SD Logger+ add-on for MyGeiger kit. SD Logger+ LCD Shield has same
dimensions as the regular MyGeiger LCD Shield. Instead of TRRS audio
socket it has micro SD card socket and TQFP-32 Atmega-328A processor
with preinstalled Arduino boot loader.
Because most of the operating time
Atmega328 enter idle sleep mode, the power consumption of whole
MyGeiger kit is still stay low as before. SD Logger adds only
1.5mA-2.0mA to the total kit consumption. When serial data is
transferred from the main PIC18F2550 uProcessor to the USB output,
Atmega328 enter active state for several micro seconds and writes
same data to the SD card. If SD card is missing, or if you do not
need SD log function, you can power down SD logger by removing LOG
JMP jumper.
Since MSP430 is very low power chip, the total power consumption of his Geiger project on background is: 0.4mA for 5110 LCD + 0.030mA for RH-K-GK-2 + 0.240mA for MSP4430 = 0.670mA total
You can visit the links above to see the full project code and more photos.
Discount Coupon 10% valid until 31 January 2015 - HappyNewYear2015 Apply it in your shopping cart before checkout. Limited up to 3 kits in one purchase on www.rhelectronics.net/store/ **Please make sure to apply discount coupon before checkout in your shopping cart, because we cannot apply it manually after checkout is completed. Thank you for choosing RH Electronics!
Well-designed electrical scheme and improved PCB layout
True voltage feedback in PWM high voltage converter that allows now to drive 20Mega ohm load on 500V
Optimized software for fast count-rate condition
Second screen mode with CPS counter
Fast CPS bargraph with logarithmic scale (great for pancake tube or scint.probe)
Native support of 500V and 400V tubes, voltage is set with jumper switch
Two LED's with buzzer clicker and mute button
Switch between CPM or CPS screen with button
The kit is robust hardware that designed to drive a Geiger Tube while high voltage and pulse counting are controlled by one microcontroller. This is simple and educational project, however load capability and performance of the circuit allows to use this board also in more serious applications, like scientific research or extreme enthusiast tests. Second CPS screen mode with bargraph can be used with sensitive pancake GM tube or with externally connected scintillation probe.
As before you have:
Dose-Rate calculation and ability to calibrate through Arduino sketch
Moving average CPM counter
UART Logs of CPM value every 10 seconds
16x2 LCD Screen
Friendly Arduino IDE source files, open source with buyer
