Email:
Password:
Remember Me |
Create Account
(Free)
Consulting Services
The 8052.com Book
Message Forum
8052 Forum
Chat Board
Forum Rules (Read!)
Tutorials
Tutorials Index
8051/8052 Tutorial
16-Bit Math
LCD Programming
8051 Instruction Set
News
Back to Subject List
Old thread has been locked -- no new posts accepted in this thread
???
11/30/07 05:16
Read: times
#147615
- Y E S . . .
Responding to: ???'s
previous message
Yes, you're right Erik .
List of 60 messages in thread
Topic
Author
Date
PC COM Ports Damaging !!!
01/01/70 00:00
Earth loops?
01/01/70 00:00
Why Now and this circuit ?
01/01/70 00:00
Damage?
01/01/70 00:00
I am Sure ...
01/01/70 00:00
Common mode
01/01/70 00:00
You haven't mentioned
01/01/70 00:00
do you have the shell of DB9 grounded?
01/01/70 00:00
Serial port damage
01/01/70 00:00
for serial port damage
01/01/70 00:00
No
01/01/70 00:00
No, that can't be right!
01/01/70 00:00
re:3.3V
01/01/70 00:00
are you sure about that, Andy?
01/01/70 00:00
Are You SURE?
01/01/70 00:00
I'm sure Dear ...
01/01/70 00:00
not to be argumentative ... but ...
01/01/70 00:00
check it
01/01/70 00:00
Checks
01/01/70 00:00
We haven't seen how the DB-9 is wired
01/01/70 00:00
It\'s probably not a DB-9!
01/01/70 00:00
sure, but
01/01/70 00:00
Sloppy terminology
01/01/70 00:00
My Burned out ports
01/01/70 00:00
What?
01/01/70 00:00
What I mean is
01/01/70 00:00
a common misunderstanding is
01/01/70 00:00
So problem is in "modern" PCs?!
01/01/70 00:00
So problem is in "modern" PCs?!
01/01/70 00:00
maybe i'm wrong
01/01/70 00:00
try with opto coupler and +9 volt supply
01/01/70 00:00
Back when folks cared whether things work ...
01/01/70 00:00
Assuming He does not have one
01/01/70 00:00
There is a way to be sure.
01/01/70 00:00
Standard
01/01/70 00:00
Power Supply ...
01/01/70 00:00
Dwhatever9 shell connection to GND...
01/01/70 00:00
about that shell-to-shell connection
01/01/70 00:00
generally...
01/01/70 00:00
Truth emerges
01/01/70 00:00
developed?
01/01/70 00:00
that\'s the problem!
01/01/70 00:00
HUH?
01/01/70 00:00
why??
01/01/70 00:00
Broken COM port suggestions
01/01/70 00:00
he is not wrong - if
01/01/70 00:00
...he is not wrong... only said watch it
01/01/70 00:00
BULL!!!
01/01/70 00:00
Bull?
01/01/70 00:00
yes, genuine male cow manure
01/01/70 00:00
Eric, you are a sad man
01/01/70 00:00
Amateurs and pros
01/01/70 00:00
of course I do
01/01/70 00:00
Well, it has to do...
01/01/70 00:00
Kai, I now you know this stuff ... but
01/01/70 00:00
Different CMOS design?
01/01/70 00:00
that's right, when you can not argue tha facts ...
01/01/70 00:00
My Dear Friends ...
01/01/70 00:00
look in the datasheet
01/01/70 00:00
Y E S . . .
01/01/70 00:00
Back to Subject List