pic microcontroller discussion list <> wrote on Wednesday, October 01, 2003
3:10 PM:

> 2. -5 and -12V  is for some analog circuit to  add on card.
> No need for both mother board PC and industry PC.

In modern machines, is -12V no longer used for RS232?  I know some RS232
driver ICs generate the +/-12 from the +5V rail, but I understood that
those in most PCs need the -12V supply.

Nigel
--
Nigel Orr, Design Engineer                 nigel@axoninstruments.co.uk
Axon Instruments Ltd., Wardes Road,Inverurie,Aberdeenshire,UK,AB51 3TT
               Tel:+44 1467 622332 Fax:+44 1467 625235
                   http://www.axoninstruments.co.uk

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