>> Hi Jinx, and thanks for the info. In the first diagram,
>> what are the squiggly things on the left?
>>
>> They looke vaguely coil-like, but I don't think that's what they are.
>
>That's what they are alright, toroidal ferrite coils
>scavenged from busted PC supplies. You'd recognise them,
>about 20mm diameter, probably around 50-100uH
>
>A few of those components are for spike suppression and
>could actually be omitted. The 630V caps,

It is worth the effort to get capacitors rated for X2 safety standard, as
they are designed for continuous mains use, and if they fail, they do it in
a safe mode.

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