From: Spiro Trikaliotis (trik-news_at_gmx.de)
Date: 2004-01-15 15:21:04
On Thu, Jan 15, 2004 at 01:05:56PM +0100, Groepaz wrote:
> but a missing rts/cts connection is pretty much ridiculous - this wont
> ever work right except when both end are faster than the actual
> transfer is.
There is also a software-handshake method (XON/XOFF, for example).
> > In a company I once worked, I remember people talking about something like
> > this, resulting in a cross current of some Ampere in an installation. This
> > was not very good. ;-)
>
> no several ampere on the 5v line of a c64 would definetly not be very good :=D
>
> however this problem can be eliminated by throwing in some diodes - and in this
> case i am not even sure if the powersupplies themselves, or the c64 board
> wouldnt silently supply these :)
As I told, I'm not the expert. Anyway, from my understanding, this
problem arises because the power lines on both sides can get different
potential ("Potenzial" in german) from the PSU, so there is some current
running through, trying to put balance this difference.
From what I remember, this happened on the serial lines (RS232C) in the
company I told, and there were some Ampere running (but not damaging
anything seriously). Flipping the power cord in the outlet solved the
problem before they used the permanent solution: Using optocoupler to
galvanically isolate both sides.
Anyone more experienced with electronics is free to jump in. ;-)
> uhmz well... THAT doesnt make a big difference at all :O) PE and N is
> connected anyway, doesnt matter where (in your house or in the powerplant).
> its just no more done in new installations because of other security measures.
Have a look here (sorry, german only):
http://www.wut.de/e-8wwww-13-apde-000.php3
According to this text, it makes a difference.
Spiro.
--
Spiro R. Trikaliotis
http://www.trikaliotis.net/
Message was sent through the cbm-hackers mailing list
Archive generated by hypermail pre-2.1.8.