Article View: sci.electronics
Article #17796Re: "Magic Eye" tubes (& other ancient technology)
From: Larry Lippman
Date: Thu, 16 Jul 1987 13:09
Date: Thu, 16 Jul 1987 13:09
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In article <584@sol.ARPA>, ken@rochester.arpa (Ken Yap) writes:
> This variety may not have existed in this country but there was another
> kind which varied a fluorescent strip. At maximum grid voltage the two
> strips closed, like a curtain. Same principle. Good fun. Imagine: I
> wanted to make a bike speedometer with those things years ago. With a
> voltage inverter and all. I was a bit crazy then. No jokes about my
> still being crazy, thanks. :-)
In keeping the magic eye tube technology, you should have used a
"vibrator" (the _electronic_ kind :-) ) as the inverter element. Even
better, you should have used a synchronous vibrator which also functioned
as a rectifier - it had auxiliary pole-changing contacts.
Does anyone remember the pleasant, "state-of-the-art" hum which
emanated from portable equipment which used vibrators? I seem to recall
that most vibrators operated around 115 Hz.
Hmmm... Have I just severely dated myself talking about vibrators?
<> Larry Lippman @ Recognition Research Corp., Clarence, New York
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!mnetor!uunet!seismo!rutgers!sunybcs!kitty!larry From: larry@kitty.UUCP (Larry Lippman) Newsgroups: sci.electronics,talk.bizarre Subject: Re: "Magic Eye" tubes (& other ancient technology) Message-ID: <1847@kitty.UUCP> Date: Thu, 16-Jul-87 09:09:07 EDT Article-I.D.: kitty.1847 Posted: Thu Jul 16 09:09:07 1987 Date-Received: Sat, 18-Jul-87 06:39:55 EDT References: <1495@frog.UUCP> <35ffa63b.b8ab@apollo.uucp> <6@spar.SPAR.SLB.COM> <584@sol.ARPA> Organization: Recognition Research Corp., Clarence, NY Lines: 21 Summary: Use "vibrator" as inverter element...