Re: Crappy mains adapters & crappy designs

jasen wrote:
On 2007-02-14, Homer J Simpson <nobody@xxxxxxxxxxx> wrote:

"Nico Coesel" <nico@xxxxxxxxxxx> wrote in message news:45d37e39.93612818@xxxxxxxxxxxxxxxxxxxx


Currently I have 4 dead wireless access points (from a very
respectable firm, not some cheap-ass ***) dead on the bench here. All
because their mains adapters died.

I posted a picture of a disassembled adapter here:
http://selvi.nctdev.nl/adapter.jpg

Looking at these I suspect they are using a series cap to reduce the voltage to the transformer.


what's the 400V electrolytic capacitor for then?

As I read it the small yellow box and the tranformer looking thing are a
capacitor across the input and a common-mode choke, the large yellow box is the transformer


yep.

I've pulled a fair few of these to bits. the construction ranges from excellent to appalling.

The trick is to stick to a reputable manufacturer.

The problem is without a hacksaw, you cant see what they are like!

Meanwell make reasonably good stuff.

Cheers
Terry
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