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On 2021/Feb/22, at 13:06, Daniel MacIsaac via Phys-l <email@example.com <mailto:firstname.lastname@example.org>> wrote:
Actually Bernie, there are a lot of cheapie power supplies out there using capacitive droppers to avoid the transformers in wall warts. Many LED lamps use these.
If you buy a super cheap (eg quite lethal when wet) $2 cell phone charger that’s for sure a capacitive dropper. The Apple charger costs 10X as much, but is much safer (real HV isolation).