On Sun, 29 Jul 2018 17:22:54 +0200
"R.Wieser"  wrote:

> True. But you need to be able to convert that power to a lower voltage to
> again become usable.  Where with AC that can be easily managed with a
> simple transformer, that doesn't work as well for DC.

 DC-DC converters are more complex than transformers being
essentially switch mode power supplies but these days for smallish power
levels they are cheap and very efficient with the complexity buried in an
off-the-shelf chip.

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