Alt-BEAM Archive
Message #05322
To: beam@sgiblab.sgi.com
From: "Travis D." beam_bot@yahoo.com
Date: Tue, 20 Jul 1999 17:24:39 -0400 (EDT)
Subject: [alt-beam] Re: Solar cell v. doubler
Want an easier way...
go here: http://www.maxim-ic.com/Datasheets.htm
go to 'all Maxim parts' then scroll down the list til
you get to the 860 and 861...check out the simple
schematic for the 'positive voltage doubler'
it only uses 1 IC and 2 small capacitors
--- Don Papp wrote:
>
> I know I intimated I wouldn't be working on the
> design any more,
> but I did a bit of timkering.
>
> I got better results with a 10K resistor for the
> oscillator (not
> 100K). Also, the 0.047F cap only seems to charge to
> about 3.x volts on
> its own, though I measure 6+ volts at the output.
> Clearly more work is
> needed. I'll try with different solar cells, too.
> Maybe I just need a
> cell that provides more current. Wish I had an
> o-scope.
>
> Anyway, if anyone is just joining this, you can see
> the simple cct
> at
>
http://diehumans.anubis.ab.ca/proj/vdoubler/vdoubler.gif
>
> R1 should be 10K, and not 100K as the schematic
> shows. If
> anyone tries something similar, I'd be interested in
> hearing about
> it.
>
> | Donald Papp
> | don@oa.net
>
>
>
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