Quote:
Originally Posted by lacad01
Hi John, you might want to check out these threads:
http://www.iceinspace.com.au/forum/s...ad.php?t=46306
http://www.iceinspace.com.au/forum/s...ad.php?t=46574
For my 2 cents worth, you should try and avoid using an inverter to supply power for your laptop, they're very ineffecient. Mobs like Jaycar & DSE sell 12V laptop power supplies.
If you can work out your total consumption in Watts coupled with hours of use then divide by 12 will give the capacity of battery in Amp hours, probably want to add 30% onto that as safety margin: e.g.
(watts x usage(hours) = Watt hours) / 12 = Amp hours
cheers  |
Holy cow. Based on that formula I get:
Laptop: 19.5v; 4.62 amps and 90 watts
it's a Dell Precision M4300
http://www.level8technology.com/serv...zmap=DL18-2598
http://www.level8technology.com/serv...p=AC-DL02-2767
Lumenera Skynyx: 5v 500ma and 2.5 watts
Mount Drive: 12v 500ma and 13 watts
Total Watts: 105.5 x 12 hours = 1266 watts plus 30% = 1645.8 divided by 12 equals 137.15 amps!!!
I think I'll need a portable generator. The problems is the laptop. It's a hungry machine!!
Does that sound right to you guys?