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Article #10806

Re: Idea for LED sequencer

#10806
From: Mark Robinson (JO PhD)
Date: Wed, 04 Nov 1992 10:36
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In article <2789@tau-ceti.isc-br.com> jimc@tau-ceti.isc-br.com (Jim Cathey) writes:
>In article <1992Nov3.094923.44351@kuhub.cc.ukans.edu> heacock@kuhub.cc.ukans.edu (Doug Heacock) writes:
>>I'm putting together a quick-and-dirty circuit that will light 10
>>LED's in sequence, one after the other.  Here's my idea so far:  I

[...]
>Why not try a shift register?  Something like a single 74LS374 and a single
>74LS74 should be easy to flange up into a reset-to-1 10-stage ring shifter.
>There should be CMOS analogs of these parts.
>
>-- 
>+----------------+
>! II      CCCCCC !  Jim Cathey

What about the 4017? This is a Johnson type decade counter - you
put in a clock and each of it's 10 outputs goes high in turn. It
has the usual reset and inhibit pins.

problems-
1. The pinout was tampered with by the KGB to make it totally 
   impossible to design a PCB for it.

2. I don't think you're supposed to drive LEDs directly from CMOS
   outputs- but it should be OK as long as you don't want them too
   bright.

Mark
mark-r@spec0.ee.man.ac.uk
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Path: arc1-ca.pugleaf.net!sparky!uunet!pipex!warwick!uknet!mucs!mark-r
From: mark-r@ee.man.ac.uk (Mark Robinson (JO PhD))
Newsgroups: sci.electronics
Subject: Re: Idea for LED sequencer
Message-ID: <6658@m1.cs.man.ac.uk>
Date: 4 Nov 92 10:36:27 GMT
References: <1992Nov3.094923.44351@kuhub.cc.ukans.edu> <2789@tau-ceti.isc-br.com>
Sender: news@cs.man.ac.uk
Reply-To: mark-r@spec0.ee.man.ac.uk (Mark Robinson (JO PhD))
Organization: Dept Electrical and Electronic Eng, Manchester University, UK
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