Hi Andy

> >>The problem with using any type of transformerless power supply in a device
> >>is that ANY electrical connection (intentional or unintentional) between
> >>that device and anything that's ground- or mains-relative (or between that
> >>device and any other device with an intentional or unintentional connection,
> >>etc...) poses a severe risk of blowing up one or both devices.
>
> I am confused by this. Aren't PC power supplies transformerless?
> Why aren't they dangerous?
The PCs uses a switching power source with a transformer, but this
transformer is for a frequency much more greater than 50Hz (ie 20KHz) so the
transformer is a little one with a ceramic core.

SET
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