Lpc2000

On 10 Apr 2005 at 19:52, lxlxlx_83 wrote:

> 
> 
> --- In lpc2000@yahoogroups.com, "Anton Erasmus" <antone@s...> wrote: >
> On 1 Apr 2005 at 13:54, Marko Pavlin wrote: > > > > > I have a project
> with LPC21xx, directly supplied from non-isolated > > mains. Is there
> a possibility to optically isolate JTAG use ULINK? For > > development
> purposes I can use isolation transformer, but I would like > > to
> isolate hot part of the circuit from my PC to avoid any fatal > >
> accidents and stil have JTAG debuging. > > > > If you are using a JTAG
> debugger with a serial interface, then it is not to difficult to >
> opto-isolate the serial connection. A ethernet interface is already
> isolated, and you > can put a small switch inbetween the debugger and
> PC, to add more isolation. > > Regards >    Anton Erasmus > -- > A J
> Erasmus
> 
> Careful!  
> 
> An ethernet transformator has not been arranged for netspanning! A
> colleague of me have kept at that a defective scoop, and it wanted to
> can end worse.

I am not exactely sure what you are warning against. Do you mean 
"line voltage" or "mains voltage" when you say netspanning ?

Are you saying that the ethernet transformer isolation voltage is not large
enough to handle 230V mains  ?

> Sorry for this a little bad automatic translated text, but my English
> is yet more awful..    

Maybe you can repeat your warning in your own language and ask someone to
translate into clearer english ?

Regards
   Anton Erasmus

 

-- 
A J Erasmus