Thank you everyone for your help and suggestions, sounds like isolating
the circuit wins the votes. Steve w.r.t. using a 6 v transformer, I'm
not sure this helps since the pic is driving a triac which is
controlling lights running on mains. No opto-isolation to keep it cheap.
Thanks again for helping me keep a smoke free environment : )
jim
> Since you're not debugging the power supply itself, why not just power the 
> circuit from a 6V (or whatever) transformer after the voltage dropping 
> element ? You get isolation, more bench space and the ouch factor is 
> removed.
> 
> Steve.
> 
> 
> On 17 May 2007 at 13:08, jim ruxton wrote:
> 
> > 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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> 

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