More about phone (291)

1-03-2007 | The biggest obstacle to reusing old mobile phone parts is usually the lack of datasheets. Undeterred the author has managed to work out how...

1-02-2007 | There are still a lot of hobbyists who enjoy making high-quality live audio recordings of concerts, interviews, radio broadcasts, natural so...

1-07-2006 | Potentially, headphone listening can be technically superior since room reflections are eliminated and the intimate contact between transduc...

1-07-2006 | While we have lost count today of all of the modems, fax machines and other telephones that have been destroyed by a ‘bolt of lightning’, su...

1-07-2006 | With this circuit you will be able to control a high-powered siren or horn, as you like, in order to relay and amplify the low-level sound o...

1-03-2006 | Galvanic isolation is a special feature of this telephone amplifier, which includes a line output connection for a hi-fi system.Although in...

1-01-2006 | Old-fashioned bakelite telephones are becoming increasingly rare in living rooms, but they’re still common enough at rummage sales. We like...

1-12-2005 | If you have a fit looking at your monthly phone bill you might want to know who’s on the phone all the time. Also, you may want to start exe...

1-11-2005 | Many of you will have an old mobile phone gathering dust. The circuit shown in this article gives the old mobile a new lease of life, enabli...

1-07-2005 | Many new devices require a headphone connection, but due to the high level of integration and miniaturisation there is usually little room l...