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From: karsh@geowhiz.UUCP (Bruce Karsh)
Newsgroups: net.analog
Subject: Re: Any 555 mavens or PUT weenies out there?
Message-ID: <176@geowhiz.UUCP>
Date: Thu, 11-Apr-85 23:37:20 EST
Article-I.D.: geowhiz.176
Posted: Thu Apr 11 23:37:20 1985
Date-Received: Sun, 14-Apr-85 06:35:19 EST
References: <469@umd5.UUCP>
Organization: UW Madison, Geology Dept.
Lines: 14

> some strapping for DTR type stuff.  Rather than build a separate plug into 
> the wall supply or run on (ick) batteries, I thought I could design a small
> DC-DC converter to run off the available +5 and produce these voltages.

  How about using some C-MOS inverters and making a charge pump.  This does
not require the transformer, will be a lot smaller, and will probably be 
less expensive and have a smaller parts count.  

-- 
Bruce Karsh                           |
U. Wisc. Dept. Geology and Geophysics |
1215 W Dayton, Madison, WI 53706      | This space for rent.
(608) 262-1697                        |
{ihnp4,seismo}!uwvax!geowhiz!karsh    |