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Re: [LUG] 12V PC revisited...

 

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On 17/05/13 14:39, tom wrote:
> Some archaeologist friends are complaining about thieves who metal 
> detect at night.

Wonder if anyone has come up with an effective jamming system for
metal detectors.

> My solution would be IR webcams (ie webcams with the IR filters
> removed)

Even with the filter in many cameras are still quite sensitive to both
IR and UV. Maybe you'd instead want to replace the existing filter with
a "low pass" one. Which would block visible light.
On the other hand the "tealeaves" are probably carrying torches which
would help spotting them.

> a small PC running of battery/solar and a directional WIFI to send
> info on certain motion detect signals. Stick something like that
> out of normal reach and it should be possible to cover quite a
> large area and volunteers could check streams and come and visit in
> the case of intruders. Any ideas? An open solution to this could
> apply for all sorts of situations.

CPC were selling the Raspberry PI Camera earlier in the week, but
appear to have run out now. The details are on their homepage.

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