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From: mknox@UT-NGP.ARPA (mknox)
Newsgroups: net.micro
Subject: Re: servo computer products
Message-ID: <61@brl-tgr.ARPA>
Date: Sun, 21-Jul-85 21:46:21 EDT
Article-I.D.: brl-tgr.61
Posted: Sun Jul 21 21:46:21 1985
Date-Received: Tue, 23-Jul-85 04:52:37 EDT
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Actually, although most RS232 interfaces do use +12, +5, and -12 VDC
inputs, it is quite simple to do DC-to-DC conversion with a couple of
transistors (or a big buffer IC).  This allows you to generate the
relatively low current -12 and +12 VDC from the +5.