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[aprssig] Geiger counter mobile from Indiana to Tennessee

Charles Bland root at blandranch.net
Wed Oct 10 23:25:44 UTC 2012


Most trackers out there these days already have an analog input. The kit
mentioned earlier has a PIC and display.... stuff that isn't needed. Does
someone have hardware that provides a representative analog level that can
be used with the existing tracker base and telemetry protocols, equations,
etc?

This does sound very cool.

Chuck

On Wed, Oct 10, 2012 at 4:09 PM, david vanhorn <kc6ete at gmail.com> wrote:

>
> But the "detector surface area is microscopic compared to the huge volume
>> of a geiger tube.  More like a thousand to 1?  Meaning for every ray you
>> detect,  you miss a thousand that do not even pass through the PN
>> junction?
>>
>
> They really aren't all that sensitive. The uninvolved area of the diode
> presents as a capacitance that lowers the sensitivity.
> I've done radiation sensing with Aptina imagers, but we had to  get to
> about 20millirad before we got enough speckles to notice.
>
> Scintillation plastic is another method that's very hackable, and it does
> give you a large sensing volume.
>
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