From: Moritz von Buttlar (info_at_baltic-microsolutions.de)
Date: 2002-02-12 06:19:07
Hi !
Your approach sounds good.
I also thought a lot about power supply. What if you don't need the full 5
volt but settle for
4.096 V ? Then you could go like this:
- connect 4*1.2 NiMH cells to get 4.8 V
- use LDO to regulate down to 4.096 (or even 4.5V)
- use capacitor switcher 7660 (or so) to invert, get -4.8 V
- also regulate to -4.096
Hmm...still quite complicated :)
But it safes one DC/DC converter or so. Maybe the easiest would
be to use more cells. Maybe the cost for additional cells is the same
and battery life goes up.
Moritz
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Moritz von Buttlar
Flash uC/DSP Development http://www.baltic-microsolutions.de
Free EEG Design http://openeeg.sf.net
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