AW: power supply question

[Ullrich Peter]

>Does it hurt if you connect an external power supply to a device, after it's
>own voltage regulator circuit?
>I want to use an external power supply on Atmel's STK200, is it okay to just
>connect the ground and 5v of the external power supply to some of the
>STK200's gnd and 5V out?
>I does work, but does it hurt the internal power circuit?

I tried this with the standard 7805 and it works fine.
It is not a "clean" method but no problems if the output voltages of the
two circuits are nearly the same.

Ciao
Peter

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