peter green wrote:
> personally i wouldn't wan't to use a laptop whoose ground bus was tied to a
> nasty voltage (which is i guess the reason for wanting the isolation).

Me neither, but a laptop with a floating ground makes it a hell of a lot 
easier to do ICD2+oscilloscope debugging without creating ground loops!

> you don't seem to have given any details on why your doing this but one
> option might be to use a floating output isolation transformer to power your
> device from during development work (thus allowing you to tie the logic
> ground of your target to mains ground without breaking anything).

Personally, I'd design the device to work of low-voltage AC or DC during 
testing/debugging, then ramp up to full AC without the debugging kit. But 
that's just me.

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