On Sunday 05 January 2014 17:42 Andrew Gabriel wrote in uk.d-i-y:

In article ,
lid writes:
Hello,

I was looking for a PSU to power a child's toy but found that the CPC
web site says "not for domestic use" against all their linear power
supplies because they do not comply with energy saving regulations.
What's this about and when did that start? Are we supposed to use SMPS
for everything now? If so, why are they still selling linear power
supplies; there must be an advantage?

I haven't bought a linear PSU for years. I always buy Switched-mode ones.
(and I do buy quite a few for the projects I build, although often
second-hand).


Not understanding SMPSUs - do they provide complete magnetic isolation like
a simple transformer does?

TRhe beuauty of a simple linera PSU for home build projects is it's hard to
get it wrong, provided you keep the mains wiring nicely separated from the
ELV side.

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