More about LED (792)

1-12-1996 | The battery indicator lamp on the dashboard of cars lights when the car's battery is not being charged. The present circuit has a simila...

1-12-1996 | In some cases, it is desirable for the input and output of an PC bus to be electrically isolated. This is achieved in the present circui...

1-07-1996 | The signal-controlled switch actuates or deactuates a.f. equipment, including preamplifiers, power amplifiers, and filters. It is partic...

1-07-1996 | This circuit is another variant of the switch described elsewhere in this issue. Its function is to switch off an audio system if there has...

1-07-1996 | Most ohmmeters and cable testers have either a moving-coil meter or a liquid crystal display (LCD). The circuit described here presents...

1-07-1996 | The dual complementary pair of switching FETS and inverter contained in a Tvpe CD4007 CMOS IC enable an LED flasher to be made that uses...

1-07-1996 | A particular difficulty with LED har displays is the high current drain. LED driver LM3914 controls a chain of LEDS instead of as usua...

1-05-1996 | In most of the United Kingdom, we are assured of a stable 240 V mains supply voltage. In many other regions, including some parts of E...

1-04-1996 | Most of us have over the years become familiar with the nervously moving pointers or LED bars of the vu (visual unit) meter on the fro...

1-03-1996 | The Radio Data is now well established among VHF- FM broadcasters aiming at providing additional information with their radio programmes. In...