I agree with the other guys... put the iso xfmr on the project supply.
That's what I do - works for me.

I have a transformerless mains powered device plugged into my iso
transformer... I have my USB ICD2 on my destop connected to the isolated
device and have not had any problems. All the magic smoke is still inside!

-- Mark

> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu]On Behalf
> Of jim ruxton
> Sent: Thursday, May 17, 2007 12:08 PM
> To: piclist@mit.edu
> Subject: [PIC]- Using isolation transformer with ICD-2
>
>
> Hi,
> I'm working on a project which has a transformerless mains powered
> supply. I want to debug it with the ICD-2. I don't have an opto-isolated
> USB hub but I do have an isolation transformer. Would it would ok if I
> put the isolation transformer on my labtop (which the ICD-2 is connected
> to via. USB) and power the circuit I'm working on with mains or
> alternately use the isolation transformer on the circuit I am working on
> and plug the laptop in directly.
> Thanks,
> Jim
>
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