Article View: sci.electronics
Article #21825Re: Wanted: Phone-in-use Indicator
From: Dean Reece
Date: Tue, 19 Dec 1989 21:06
Date: Tue, 19 Dec 1989 21:06
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In sci.electronics neumann@udel.edu (Brian R. Neumann) writes: > >Does anyone know of any simple circuit I could build or of any device >that I could by to show when the phone is in use? Sure, I built one into my phone, and it works great. The schematic is available on page 668 of "The GIANT Handbook pf Electronic Circuits" published by TAB books, ISBN= 0-8306-9673-3 in hardback, or ...-9662-8 in paperback It needs a 6 volt (or 5 volt) external supply. ______________________________________________________________________ | Dean Reece Member Technical Staff |"The flames are all long gone | | The Santa Cruz Operation 408/458-1422 | but the pain lingers on" | |___________deanr@sco.com_______________|___________________Pink_Floyd_|
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!uunet!sco!deanr From: deanr@sco.COM (Dean Reece) Newsgroups: sci.electronics Subject: Re: Wanted: Phone-in-use Indicator Message-ID: <4174@scolex.sco.COM> Date: 19 Dec 89 21:06:45 GMT References: <6375@nigel.udel.EDU> <1989Dec18.101522.20175@santra.uucp> Sender: news@sco.COM Reply-To: deanr@sco.COM (Dean Reece) Organization: The Santa Cruz Operation, Inc. Lines: 16