Isn't optical isolation overkill?

From: michalchik_at_aol.com
Date: 2001-11-13 21:31:40

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I can understand that you have safety concerns, but I have been
assembling and fixing computers for years now and have yet to get
shocked by one. The voltage after it gets out of the power supply is
limited to about 12 volts (on most past it is 5 or less).

In addition there are simple electronic things that you can do to
build in protections. Off the top of my head just running groundwires
blocked by zener diodes should be sufficient. They would instantly
ground any voltage above a few volts.

I don't think that even professional medical EEG's bother with
optical isolation.

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