Home   |  Schematics |  Products |  Tutorials  |  Datasheets  |  Robotics   |   Download    |   Link Exchange

Direct Current
Alternating Current
Digital Electronics
PC Architecture
Electronics Dictionary

Associations and Societies
Component Manufacturers

Electronics Symentics

Telephone Ringer Circuits

Audio Visual Ringer:  extra ring detector with LED and sound output. FAIR WARNING THIS SITE HAS ANNOYING POP UP ADS.
Chip recorder customizes phone ringer:  07/25/2002  EDN - Design Ideas / Companies usually purchase one type of telephone for all employees, which is understandable, especially if they obtain a discount for buying in quantity. One ringer sound for everyone can pose a problem, though, if the sound of a ringing phone makes a dozen people pause and look at their telephones. Equally annoying is the absence of a visual message indicator..
Contactless Ringer for Telephones
Simple Telephone Ring Tone Generator
Soft Musical Telephone Ringer
Telephone Ring Detector:   This is a great project to build with a complete run down of the circuit operation included all parts are listed.
Telephone Ringer :  The circuit requires four astable multivibrators for its working. Therefore two556 ICs are used here. The IC556 contains two Timers (similar to555 ICs) in a single package. One can also assemble this circuit using four separate555 ICs. The first multivibrator produces a rectangular waveform with1-second ‘low’ duration and2-second ‘high’ duration. This waveform is used to control the next multivibrator that produces another rectangular waveform.
Telephone Ringer Circuit:  Low cost, easy to build Telephone ringer circuit.
Telephone Ringer using 556 Dual Timers:  Using modulated rectangular waves of different Time periods, The circuit presented here produces ringing tones similar to those produced by a telephone. FAIR WARNING -- THIS SITE HAS ANNOYING POP UP ADS.
Telephone Ringer using Timer ICs
Telephone Ringer Using Timer ICs
Telephone Ringing Circuits:  how to detect ringing and how to make phones ring

Home  Products  Tutorials   Schematics   Robotics   Resources   Radio Stuff    Career    Download   Link Exchange

HTML Sitemap   XML Sitemap

Terms & Conditions  Privacy Policy and Disclaimer