Path: utzoo!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!ames!killer!netsys!vector!nobody From: sco!rosso@uunet.UU.NET Newsgroups: comp.dcom.telecom Subject: Re: Building your own phone projects Message-ID:Date: 28 Nov 88 09:13:08 GMT Sender: chip@vector.UUCP Lines: 26 Approved: telecom-request@vector.uucp X-Submissions-To: telecom@bu-cs.bu.edu X-Administrivia-To: telecom-request@vector.uucp X-TELECOM-Digest: volume 8, issue 187, message 5 In article kgdykes@watmath.waterloo.edu (Ken Dykes) writes: >Well, there is a book of do it yourself phone projects, while i personally >consider simplistic and definetely dated on what ICs are available, >will provide "functional" circuits for the above two problems and others >toys. ok, so i cant spell definitely >Its a "SAMS" project book. > SAMS Electronic Telephone Projects, 2nd edition > by Anthony J. Caristi > ISBN 0-672-22485-2 Data books from IC manufacturers are another good source of projects. Many of them have "applications notes" containing full schematics to illustrate the use of the chips they make. The latest databook from Exar Corp. (2222 Qume Drive, San Jose, CA 95131) has a circuit for a speakerphone using their speakerphone IC, complete with schematic diagram, parts list, and even a printed circuit board layout. Also in the book are full circuits for a pulse/touch tone phone, and several modems. Most databooks are free for the asking in single quantities (Exar was handing out copies at a career fair). Many IC makers also sell evaluation boards for engineers to experiment with new chips. This is a great way to experiment with the latest technology. Ross Oliver uunet!sco!rosso