In article ,
Dave Plowman (News) wrote:
No mains available without digging up 100ft of garden, just a 12V
battery which I will charge periodically.


Maplin do a kit which runs off 12 volts.

http://www.maplin.co.uk/Search.aspx?...mp;source=1 5

Which added to Grunff's PIR should give what you want.

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*They call it PMS because Mad Cow Disease was already taken.

Dave Plowman London SW
To e-mail, change noise into sound.