More about phone (291)

1-02-1988 | EE 63 February 1988 INFRA-RED HEADPHONES A low-cost infra-red transmitter and receiver to put an end to the inconvenience of an ever too sho...

1-10-1987 | EE 36 October 1987 LOW-NOISE MICROPHONE PREAMPLIFIER A quality preamplifier that can be configured for low and high impedance, as well as ba...

1-07-1987 | Although the use of SMDs (sur- face mount devices) is not yet widespread among electronics hobbyists, and the availability of these parts is...

1-07-1987 | There is little doubt that the headphone amplifier de- scribed here belongs in the so- called high end class of audio equipment, and is, the...

1-09-1986 | EE September 1986 HEADPHONE AMPLIFIER Anyone with a keen ear for hi-fi sound reproduction should read this article, which details how the Ty...

1-07-1986 | Alan G Hobbs 18telephone-bell simulator This circuit is intended for use in a small private telephone installation. The ringing tone sequenc...

1-07-1986 | EE 112 July/August 1986 192microphone-signal processor D1 In broadcasting systems, intercoms, and mobile radio telephones it is necessary to...

1-12-1985 | by J Steeman telephone exchange Nowadays, there is a variety of inexpensive, yet sophisticated, telephone sets on the market. Not all of the...

1-07-1985 | elektor July/august 1985 Microphones, unfortunately, produce onlyasmallsignalandthey,therefore, require a special pre-amplifier to boost the...

1-07-1985 | This 1-watt amplifier lends itself par excellence for use as driver for a low impedance headphone or as output stage in a hi-fi preamplifier...