Path: utzoo!attcan!uunet!tellab5!verive
From: verive@tellabs.com (Jeff Verive)
Newsgroups: sci.electronics
Subject: Re: sequencer...
Message-ID: <4758@tellab5.tellabs.com>
Date: 5 Dec 90 18:35:48 GMT
References: <2047@mountn.dec.com>
Sender: news@Tellabs.COM
Organization: Tellabs, Inc., Lisle, IL
Lines: 34

In article <2047@mountn.dec.com> hutzley@bigq.dec.com (Steve Hutzley) writes:
>
>    I was wondering if anyone could help me with a project I'm trying to put
>    together.
>
>    I'm sure by now, that everyone has seen the christmas lights that CHASE
>    (this I belive is the theatrical term for it)...The kind of lights that
>    have the following sequence..
>
>        1000
>        0100
>        0010
>        0001
>
>        and repeats continiously, at a set rate.
>

There are a lot of ways to do this.  If you really want to, you could
set up a state machine with flip-flop's and assorted gates, but this
is fairly complicated for the uninitiated.  You might try counting 
through some ROM, like you would do for an arbitrary wave generator, 
but the simplest thing to do is to use any cheap oscillator (like the
555) and feed its output to the clock input of a CMOS 4017 decade 
counter.  Works great (less filling, too!)  :-)

Jeff



--
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**   Jeff  Verive  |  If they ever stop making those little candy flowers **
**   259371048378  |  for birthday cakes, I shall lose my will to live.   **
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