In article , Eiron wrote:
Jim Lesurf wrote:
In article , blackbat
wrote:
On Sun, 31 Jan 2010 19:10:54 +0000, Adrian C
wrote:

Anyway, the transformer voltage stepup Jim was proposing might be
worth pursuing. A couple of LT700's from Maplin?

Well maybe. What about power? I need to power any device in a car and
in the home. Might get a bit messy.

I'd assumed the mp3 player would be battery powered as an item meant
for portable use. The transformers obviously don't need powering. So
I'm not clear what you are asking about.
[snip]

How about a dual op-amp and 4 resistors?

One of the reasons I suggested transformers is that - unlike op amps - they
don't require powering. But, yes, if power is available then a couple of op
amps, etc, should work.

Slainte,

Jim

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