typical RS-232 for PC
typical RS-232 for PC
(OP)
Copied from wiki about RS-232, "the standard requires the transmitter to use +12V and −12V, but requires the receiver to distinguish voltages as low as +3V and -3V. Some manufacturers therefore built transmitters that supplied +5V and -5V and labeled them as "RS-232 compatible."
At what voltage rail does the RS-232 on PC transmit (typically)?
At what voltage rail does the RS-232 on PC transmit (typically)?





RE: typical RS-232 for PC
Also; the nature of your question suggests that you intend to steal some current from the RS-232 interface. Get the idea out of your head; many of them will barely light a small LED, much less power receivers and logic in your box.
Mike Halloran
Pembroke Pines, FL, USA
RE: typical RS-232 for PC
Keith Cress
kcress - http://www.flaminsystems.com
RE: typical RS-232 for PC
Dan - Owner

http://www.Hi-TecDesigns.com
RE: typical RS-232 for PC
10 years ago these sat at +/- 7 to 9 volts
RS-232 Tx-Rx ICs even had 232 in their names .
Assuming any better than +/- 3V will work
.. when it feels like it !
( measure actual equipment to be used for clues )
RE: typical RS-232 for PC
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If we learn from our mistakes I'm getting a great education!
RE: typical RS-232 for PC
Benta.
RE: typical RS-232 for PC
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: typical RS-232 for PC
Dan - Owner

http://www.Hi-TecDesigns.com
RE: typical RS-232 for PC
Cedar Bluff Engineering
http://cedarbluffengineering.webs.com
RE: typical RS-232 for PC
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If we learn from our mistakes I'm getting a great education!