Article View: sci.electronics
Article #21818Re: Wanted: Phone-in-use Indicator
From: Jim Lips Earl
Date: Tue, 19 Dec 1989 23:09
Date: Tue, 19 Dec 1989 23:09
14 lines
1165 bytes
1165 bytes
You might want to pick up the December issue (if still available) of POPULAR
ELECTRONICS/HANDS ON ELECTRONICS. It had an article/schematic of a circuit
that contained only a couple of parts. You have to put one on every phone
in the house, but it will do what you want. It has no LED, but if someone
is on the line, it "locks out" all the rest of the phones in the house.
It requires no additional wires to be run to each phone. If you can't find
the issue, I'll try and do an ascii schematic for you.
--
Jim "Lips" Earl UUCP: ucbvax!ucdavis!csusac!mmsac!jim
KB6KCP INTERNET: mmsac!jim@csusac.csus.edu
=======================================================================
The opinions stated herein are all mine.
Technical Details
Message-ID:
<2872@mmsac.UUCP>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!ucbvax!ucdavis!csusac!mmsac!jimReferences:
<6375@nigel.udel.EDU>Show Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!ucbvax!ucdavis!csusac!mmsac!jim From: jim@mmsac.UUCP (Jim Lips Earl) Newsgroups: sci.electronics Subject: Re: Wanted: Phone-in-use Indicator Summary: See article in magazine Message-ID: <2872@mmsac.UUCP> Date: 19 Dec 89 23:09:00 GMT References: <6375@nigel.udel.EDU> Lines: 14