From: roland <for_spam_at_gmx.de>
Date: Thu, 22 Apr 2004 20:58:11 +0200

> > The Player/Recorder models use the battery voltage directly, not so easy
> > there.

cool.
datel has a dc/dc-converter searchengine :)

http://www.datel-europe.com/en/products/search/

what about:
http://www.datel.com/data/power/uns10-15w.pdf
for 5.0V -> 3.3V power conversion ?

did i read that someone runs his 8mb-modded AJB ~17hrs ?
i`m excited how long it would run with an 1.8" HDD

:D

regards
roland

ps:
just having fun "brainstorming" about such stuff :)



----- Original Message -----
From: "roland" <for_spam_at_gmx.de>
To: "Rockbox development" <rockbox_at_cool.haxx.se>; <idc-dragon_at_gmx.de>
Sent: Thursday, April 22, 2004 8:35 PM
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
> >
>
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>

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Received on 2004-04-22