All items tagged with time and technology (303)

1-12-1992 | If you ever need to derive a 5 V line from, say, a 15-25 V supply, National Semiconductors LM1575 and LM2575 are ideal. These switched 5-...

1-12-1992 | Most debounce circuits shorten or lengthen the time a switch is pressed to obviate interference pulses caused by switch bounce. The pres...

1-12-1992 | The charger makes cunning use of the properties of a Type 555 timer. The tnternal window comparator of the lC is set to 4.7 V by zener dio...

1-12-1992 | One advantage bipolar opamps have over FET types is that their input noise level is appreciably lower. However, when abipolar opamp is us...

1-07-1992 | When the Atari ST is provided with an external hard-disk drive, it has to be reset after about 15 seconds, as otberwise the drive is not...

1-07-1992 | The proposed transmitter provides an optical(infra-red). that is, wireless, connection to a head-phone. The receiver is described in the nex...

1-07-1992 | This article is one from our 90s collection, the articles are downloadable as a PDF for all our members. Although the information we have on...

1-07-1992 | This article is one from our 90s collection, the articles are downloadable as a PDF for all our members. Although the information we have on...

1-07-1992 | The super starter makes it possible to start cars with ageing batteries and obsolescent (coil-based) ignition systems, particularly during...

1-07-1992 | This signal generator provides a 440 Hz sine wave output at two levels. The power supply may lie between 1.5 V and 16 V, so that even a...