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On 18/05/13 08:13, Mark Evans wrote:
Its only at night this is a problem - the areas are normally quite busy in daylight hours.-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 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.
Does cheese work on the Pi (I've got one but the OS sd still hasn’t arrived!!!) as the Pi camera is a bit expensive compared to others! I'd probably like a bit more power as I think 4 or 5 would be needed to give nearly full coverage.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.
Tom te tom te tom -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/listfaq