On Jun 25, 11:18*am, "Dave Liquorice"
wrote:
On Sat, 25 Jun 2011 02:44:56 -0700 (PDT), Andy Dingley wrote:
I'd be thinking about solar (keep an eye on Maplin for bargain
clearances),

Carlisle has the 3' x 1' 20W (I think) panels at £40 each ATM...

Check mail order too. I've got one of the 100W panels that I just
clicked on by chance one day when I got a circulated text message
saying that they'd suddenly gone half price again. Shipping was too
cheap to meter.


... recycled car batteries for low cost, ...

They might not have much deep cycle capacity

So don't cycle them so deeply. Just use more batteries. Car batteries
are available for scrap value and half of that lot collected will
still be usable for capacity-limited low-cost energy projects like
this.


One might need to make allowances for acid vapours - ventilation/acid
resistant enclosure.

_Appropriate_ allowance should be made, but if you avoid massive
currents and overcharging, then there's a very lot risk of the sort of
hot outgassing that throws acid vapour around. I've seen one guy break
his arm after slipping on the acid-proofed telephone exchange floor
(those big battery rooms were like swimming pools) and I've seen a
couple of "trustworthy" APC UPSes blow themselves up and spit acid
(rack-mounts UPSes are not a wise idea), but I've never yet seen a
bunch of hippies, a rack of car batteries and a wind turbine have any
trouble.


I've not seen any "spray light every where" LED luminaires. They are
all directional to a greater or lesser extent.

LEDs aren't sold as luminaires so much, because they don't need so
much insulation, either electrical or thermal. Many are sold as bare
sticks or even flexible tapes that you're expected to house
yourselves.

It's also quite easy to make your own up from bare LEDs, usually
surface mount, onto a couple of conductors. Insulated wire with knife-
scrape exposures can work for this, or you can buy magic mounting twin-
core wire that's the right spacing and pre-bared at intervals. Even
better is to series them and use a constant-current drive. Cree
SuperFluxs (400mcd @ 130º) are under 40p each now by the dozen.

As it's wildlife, you might want to install a set of red lights too.
This will keep your own night vision in better shape, works better in
conjunction with NVGs, or you could simply badger watch with the
lights on.