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Subject: Re: Re[2]: 1,8" HDD for ajb ?
From: roland (for_spam_at_gmx.de)
Date: 2004-05-07


no problem - you send me the ticket for a flight to northern chile ?
:D

----- Original Message -----
From: "RudiS" <mailmetorudiS_at_gmx.ch>
To: "Rockbox development" <rockbox_at_cool.haxx.se>
Sent: Friday, May 07, 2004 1:19 AM
Subject: Re[2]: 1,8" HDD for ajb ?

> Hallo Roland,
>
> Could you test your HD as well as in 4700m altitude ? :-D
> Then my problem should be solved too.
>
> RudiS
>
> Am Donnerstag, 6. Mai 2004 um 18:06 schrieben Sie:
>
> r> Hi!
> r> Ordered a 1.8" Hitachi Travelstar C4K40 and got it delivered today.
> >>From my first point of view:
> r> works like a charm - and my feeling is, that my ajbrec is even more "responsive" -
> r> i.e. when browsing/ffwing the songs, it seems to be a little bit quicker
> r> than the 2.5" model i had before.
> r> ssssiiiiiiiiiipp - much higher noise than a 2.5" hdd :)
>
> r> now i need to watch out for the 5->3.3V power converter to save real power and
> r> get really long runtime.... :)
>
> r> btw: i wasn`t into "electronics" for some time now, could someone recommend
> r> a good and cheap solution, to measure voltage/current with the pc (over a longer
> r> time period) ?
> r> a cheap multimeter with pc-interface with appropriate datalogging software ?
> r> an a/d converter with usb interface and easy to use (turtle grahpics? ;) scripting?)
> r> programming interface, to write your own datalogger ? i would probably buy such and
> r> post the resulting current-diagrams. i don`t have my "conrad electronics" (german
> r> radioshack equivalent) by hand - and browsing their website isn`t really fun.
>
> r> regards
> r> roland
>
>
>
>
>
> r> ----- Original Message -----
> r> From: "roland" <for_spam_at_gmx.de>
> r> To: "Rockbox development" <rockbox_at_cool.haxx.se>; <idc-dragon_at_gmx.de>
> r> Sent: Thursday, April 22, 2004 8:35 PM
> r> Subject: Re: 1,8" HDD for ajb ?
>
>
> >> > The Player/Recorder models use the battery voltage directly, not so easy
> >> > there.
> >> we would need an additional dc/dc-converter, right ?
> >> these exist in form of integrated circuits and have very few power consumption.
> >>
> >> these ones
> >> http://www.maxim-ic.com/appnotes.cfm/appnote_number/725
> >> seem to be too "weak" for doing their job in an archos (hdd needs more current),
> >> but maybe someone knows a cheap, powerful, low-power 5.0->3.3V converter-ic ?
> >>
> >> i think it`s difficult to give an estimation, how much power is being saved and
> >> how much more runtime an ajb would get - but if it`s >3-4 hrs additional runtime,
> >> i would probably buy such disk.
> >> i did a quick compare - and it seems this hdd (at 3.3V) consumes half of the power
> >> of an ordinary 2.5" hdd
> >> so i think it`s worth to discuss further - isn`t it ?
> >> changing the hdd to this model should probably give a SIGNIFICANT runtime benefit,
> >> imho.
> >>
> >> regards
> >> roland
> >>
> >>
> >>
> >> ----- Original Message -----
> >> From: "[IDC]Dragon" <idc-dragon_at_gmx.de>
> >> To: "Rockbox development" <rockbox_at_cool.haxx.se>
> >> Sent: Thursday, April 22, 2004 10:36 AM
> >> Subject: Re: 1,8" HDD for ajb ?
> >>
> >>
> >> > > Wouldn`t that fit into an archos , giving even longer runtime ?
> >> > >
> >> >
> >> http://www.hitachigst.com/tech/techlib.nsf/techdocs/4B0BCB1DB47911A386256D5500494CDC/$file/HGSTTravelstarC4K40.PDF
> >> > > looks like a standard 2,5"hdd mechanical interface to me.
> >> >
> >> > Yes it will fit, these drives are mechanically like half a 2.5" drive. The
> >> > connector end is the same.
> >> > The supply is nominally 3.3V now, but also tolerates 5V at the cost of
> >> > higher consumption.
> >> > If mounted into an FM/V2, you could modify the supply to give less than 5V.
> >> > Those models have a DC/DC converter to make 5V from the LiIon voltage which
> >> > can then be bypassed.
> >> > The Player/Recorder models use the battery voltage directly, not so easy
> >> > there.
> >> >
> >> > Jörg
> >> >
> >> > --
> >> > NEU : GMX Internet.FreeDSL
> >> > Ab sofort DSL-Tarif ohne Grundgebühr: http://www.gmx.net/dsl
> >> >
> >> > _______________________________________________
> >> > http://cool.haxx.se/mailman/listinfo/rockbox
> >> >
> >>
>
> r> _______________________________________________
> r> http://cool.haxx.se/mailman/listinfo/rockbox
>
>
>
> --
> Mit freundlichen Grüssen
> RudiS
>
> mailto:mailmetorudiS_at_gmx.ch
>
> _______________________________________________
> http://cool.haxx.se/mailman/listinfo/rockbox
>

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