More about radio (328)

1-05-2001 | In this day and age when we’re surrounded by hi-tech we should leave it all behind and return to a very basic circuit. So stop thinking for...

1-01-2001 | This article introduces a PC-based radio-linked caller identification system. It consists of a central receiver and up to 16 caller units. T...

1-12-2000 | In 1998, as part of the MMC project, researchers at the Technical University of Delft, the Netherlands, started to design a small but powerf...

1-07-2000 | Here is a simple circuit for a one transistor Audion type radio powered by a 1.5 V battery. It employs a set of standard lowimpedance headph...

1-07-2000 | If you ever look at construction notes for building old detector type radios the type of headphones specified always have an impedance of 2...

1-01-2000 | Presently, data transfers between the PC and printers, scanners, fax machines and modems, as well as communication between a laptop and a ce...

1-12-1999 | This rugged power supply is based on the popular LM338 3-pin voltage regulator. The LM338 is capable of supplying 5 A over an output volta...

1-10-1999 | The design described in this article is one of those with immediate appeal. It is easy to build, very compact, and offers exceedingly...

1-07-1999 | Many radio amateurs will not fail to recall the chaotic situations that may occur during fielddays or contests, when several radios have t...

1-07-1999 | This compact 13-V/2-A power supply for ham radio rigs and other VHF/UHF portable PMRs is based on the STR2012/13 voltage regulator IC from...