ReadyToBuild Telephone Enhancements Author:Delton T. Horn Does your telephone have a harsh or annoying ring? Want to keep the kids from dialing 900 numbers when you're away? Wouldn't it be nice if a telehone could tell you when it's been left off the hook? These and many other problems can be solved easily and inexpensively with Delton T. Horn's Ready-to-Build Telephone Enhancements. Horn shows how to ... more »turn an average, every day telephone into something much more. . .a fully functional, multi-purpose home communications system that saves you time, money, and worries. With 30 simple, low-cost projects to choose from, this book offers something for everyone--from musical ringers to 900-number disconnects to off-the-hook alarms. It's a virtual feast of novel ideas for electronics hobbyists and do-it-yourselfers: a touch-tone signaller and decoder, hold button with music, computerized auto-dialer, call timer with automatic hang-up, long distance lockouts, auto-answering modem, tape recorder interface, and more.« less
ISBN-13: 9780830643592 ISBN-10: 0830643591 Pages:186 Edition:1st ed Rating: