[En-Nut-Discussion] ground difference

[emjay]

thx mr. Andersson for your reply,

snip...
I think you *should*

connect your grounds together. It is the easiest solution to 
your problem.

...snap

in this case i would bridge the diode, i can't imagine, that this is so 
good for the nut

i need to measure the speed indicator of an cpu fan (outside, on desk 
only :-) )
is it possible to use the 12V supply for the ethernut and the fan 
simultaneosly, maybe by using the pins of the unused jumper 3 (JP3) and 
then conntect the speed indicator signal to int0
therefor no "groundconnection" is needed, isn't it, could this work

i don't want to destroy my ethernut

emjay



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