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G'day all, thanks for the replies.
The main battery I'm using is a 35 amp hr battery. So it should last a night, hopefully 2, but unsure. Until now it's just been powering the Losmandy which of course it could do for a whole day without a problem. But soon it will be powering the Losmandy, Toshiba with EOS350d connected (powered off it's own batteries), and maybe the SBIG eventually. I'm not sure how quickly it's going to get drained then (combined draw from all that is somewhat unpredictable depending on many things), so need to know the level.
cjmarsh81 - one of those kits sounds ideal. I'll check out what Altronics/Jaycar/DS have.
RAJAH235 - Thanks for all your info, but while I can solder wires and plugs, I have to admit that I don't remember enough of my university engineering to read the diagrams and understand the components, so it's a little above me :-)
Vermin - That gadget sounds great! (I'll take anything that glows and has a digital output, must be good). However one question - it says you can't turn the backlight off - is that so? is the light a problem? Temp too, that'd be neat.
Thanks for all the input, much appreciated.
Roger.
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