On Monday 11 February 2002 19:06, Jeff Newmiller wrote:
> Using chassis ground as signal ground is not recommended, as the two
> may differ significantly if an electrical short occurs or if you
> start disconnecting parts out of sequence.
>
> Remember, current flows in a loop... keep the loop small (area wise)
> and use the appropriate ground references.
Good point! ... revision 50 goes as follows:
Yep, if I had really spent some time thinking about this roughly 20
posts ago, I'd probably posted something similar to this:
IDE connector pin #30 missing R8 LD017 pin#62
0---------------0 0---------0
Ground | | #WP
0 Jack 0
| |
0-switch-0
Find the missing R8, assuming it exists since it is on the
schematic and data sheet, and simply add a jack where
R8 _would_ go if it existed. From this jack, wire in a
RF safe switch ... as Charles noted, something like an
unused 'reset' switch would be perfect. In the closed
position, the drive will be write-protected. In the open
postion, the drive will not be write-protected and operate
as released to the general public. The addition of the
jack (to wire in the jack) is to protect the the device in
case you try to do something like remove the switch or
drive while powered up .... it is not necessary if your
not concerned about this, but suggested all the same!
Done! ;)
~Lynn Avants
aka Guitarlynn
guitarlynn at users.sourceforge.net
http://leaf.sourceforge.net
If linux isn't the answer, you've probably got the wrong question!
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