From: John Morrison (jmorrison_at_ahc.net.au)
Date: 2002-02-03 01:46:01
Thanks for that.
As I said I haven't been following so I missed that important bit of info.
:-\
So it sounds like a good possibility that whole unit may be able to be
powered from the computer via USB +5 or PS/2 (keyboard)+5.
Or isn't there a high enough current available from there ??
John
> -----Original Message-----
> From: Joerg Hansmann [mailto:info_at_jhansmann.de]
> Sent: Sunday, 3 February 2002 2:38 AM
> To: buildcheapeeg_at_yahoogroups.com
> Subject: Re: [buildcheapeeg] Power
>
>
> Hi John,
>
> ----- Original Message -----
> From: John Morrison <jmorrison_at_ahc.net.au>
> To: buildcheapeeg <buildcheapeeg_at_yahoogroups.com>
> Sent: Saturday, February 02, 2002 1:34 PM
> Subject: [buildcheapeeg] Power
>
>
> > I've been keeping out of the hardware discussions as most of
> you know MUCH
> > MUCH more that I know!!!
> >
> > BUT!
> >
> > Just a thought about power. Say one of the users wants to make his unit
> > portable. A Laptop or Palm computer would be able to record
> the data, BUT
> > if the unit needs mains to run he is tied to a wall socket!
>
> Most of the eeg units discussed/planned/built here are battery powered.
> The modularEEG and the RS232EEG use a 7..12 V unregulated DC source or a
> regulated 5V DC source. This can be a battery or a wall socket
> transformer,
> because the optically isolated amplifier stage gets its supply power
> from a DCDC converter that isolates the power source a second time.
> This construction is versatile, but not so very optimized for
> long battery life,
> because the DCDC converter needs much current (about 100mA).
>
> Regards,
>
> Joerg
>
>
>
>
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This archive was generated by hypermail 2.1.4 : 2002-07-27 12:28:38 BST