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Re: [AVR-Chat] Re: PC COM Ports

2005-12-15 by Thomas Keller

John Samperi wrote:

> At 05:52 AM 15/12/2005, you wrote:
> >0/+3 happens to work on classic 1488/1489 buffers, "but its not right."
> >
> >Super serious workstations used to rigidly ahere to +-10 volts.
>
>
> + - 25V being the 'right' voltage :-)

  Uhm...IIRC correctly, the RS-232C specification reads that the signal 
voltages are to be +/- 12.5 VDC (25 v total across the two).

tom

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