[aprssig] APRS Radiation sensor
Bernard Van Haecke
bernard.vanhaecke at gmail.com
Wed Mar 23 12:55:47 CDT 2011
All Geiger counters work on the same principle. When a particle enters the
ionises the gas and generates a spike. Counting spikes per minute
determines the radioactivity rate in CPM and that's what you want to report.
The APRS telemetry code I posted on my QRZ page for the Arduino and
can count the spikes per minute via a digital pin (just make sure you don't
volts into your Arduino) as well as readings from the serial port.
Theoretically, any Geiger counter can be used/modified to get the pulse
signal and shape
it as a TTL 5v pulse. In normal circumstances, you should get between 10
and 40 CPM.
There is nothing available out of the box so in any case some
is required. Using a counter with serial port is easier though. Note that
even those don't
report average counts per minute over their serial ports. They report
I doubt any existing weather station is capable of doing simple maths like
averages etc... so there again some hacking is required. The Arduino seems
the easiest way to go (in my opinion).
As time goes by I expect hams to come up with simple designs/schematics
how to hook up a Geiger tube or hack existing counters to connect to
the like. Some over here are actually looking into this already.
On Wed, Mar 23, 2011 at 9:07 AM, Julian, G4ILO <julian.g4ilo at gmail.com>wrote:
> A lot of domestic hand-held radiation monitors such as are
> manufactured in Ukraine have only an LCD readout. They are much
> cheaper than the ones with computer interface. Is there any way that
> they could be used? Could the system accommodate manually entered
> Julian, G4ILO
> G4ILO's Shack: www.g4ilo.com
> aprssig mailing list
> aprssig at tapr.org
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