[sdiy] USB/MIDI ground isolation?

[Neil Johnson]

Hi,

cheater cheater wrote: 
> Isn't ethernet galvanically isolated? (if so - how?)

Transformers.  For example, the transformers for (U/S)TP allow Power-over-Ethernet by applying power as a common-mode voltage across the TX and RX pairs.  A DC-DC converter then gets the power across to the device while maintaining the galvanic isolation.

Neil
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http://www.njohnson.co.uk