[AZ-Observing] Re: Recharging
- From: Stan Gorodenski <stanlep@xxxxxxxxxxxxx>
- To: az-observing@xxxxxxxxxxxxx
- Date: Tue, 17 Mar 2015 08:45:03 -0700
Dwight,
You are correct about not needing a super computer to do astronomy in
the field. I bought this for other reasons besides astronomy. Although I
have never tried seeing how long it will run on the battery alone, the
ad in B&H when I bought it says it has "9-Cell Lithium-ion providing up
to 12.8 hours per charge (94Wh)", whatever 94Wh means. The battery is
sort of an odd design. It sticks out about an inch beyond the laptop, I
guess to fit in all the 9 lithium cells.
Stan
On 3/17/2015 3:17 AM, (Redacted sender DBogan3220@xxxxxxx for DMARC)
wrote:
> 2.6 Ghz I7 is likely the problem. I look through trying to find the specs
> on how much power is required to run these kind of laptops and there is no
> info. How long can you operate your machine without having the charger
> hooked up? If its less than two hours that is not good. You need to find a
> laptop that gives you at least 4 hours or more. You don't need a processor
> that
> cooks along a better than 2 Ghz for what we do with our laptops out in the
> field with CCD camera's, telescope mount, guider, 10 programs running at
> the same time we are not exactly taxing the machine. When I'm shopping for a
> laptop my requirements are how much power does this thing consume less than
> 65W is good. 45 Watts is better. Clock speeds can be as low as 500 Mhz for
> what we do. My 1st Gen I3 machines are running at around 1 Ghz which is
> more than enough. Plus I run with the screen dimmed to the min brightness out
> in the field and if it sits idle and CCD camera taking picture with guider
> running is Idling trust me nothing can be more boring for a computer than
> doing this I let the screen go out since I'm likely out running around
> looking through other peoples telescopes or bothering Steve Coe. BTW I can
> get
> up to 8 hours on just my laptop battery doing this. The cheaper 200 dollar
> AMD machines I find at best buy are about all we need. Now when it comes to
> processing images that is a different story but out in the field taking
> pictures just about anything works. My 1st laptop I used out in the field
> years ago was just 100 mhz pentium machine with less than 500 meg of ram and
> that was about typical for the day the hottest CCD was the ST8 and guy's
> were taking fantastic images with just this setup. Oh yeah I forgot about this
> program I had Astro-Physics Digital Sky voice running the AP 900 goto mount
> at that time this was 1998 99 time frame.
>
> Dwight
>
>
>
> In a message dated 3/16/2015 8:40:02 P.M. US Mountain Standard Time,
> stanlep@xxxxxxxxxxxxx writes:
> It has:
> 2.6GHz Intel Core i7-3720QM Quad Core Ivy Bridge
> Intel HD Graphics 4000 Shared; nVIDIA Quadro K100M Graphics (2GB)
> 15.6" Full HD Anti-Glare LED-Backlit Display
> 1920x1080 Native Resolution
> L3: 6MB Cache
>
> Stan
>
>
> On 3/16/2015 8:15 PM, (Redacted sender DBogan3220@xxxxxxx for DMARC)
> wrote:
>
>> Is this an I7 machine with a high performance graphics card and a 17 inch
>> laptop screen. That would draw some current. The latest generation of I3
>>
> I5
>
>> and even I7 4th Gen processors and boards don't really draw that much
>> current then again I'm more familiar with Toshiba laptops and most of
>>
> the latest
>
>> ones I've looked at recently are running 45 watts and 65 watts
>>
>> Dwight
>>
>>
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