More about LED (792)

1-01-1978 | Various meters based on the Siemens UAA 170 LED voltmeter IC have previously been featured in Elektor (issue 12, April 1976 and issue...

1-07-1977 | Because of their low cost, high input resist- ance, good noise immunity and wide supply voltage range CMOS logic circuits `lend t...

1-07-1977 | The 74121 IC is a monostable multivibrator, the pulse length of which may be varied from 40 ns to 40 s. An external RC-network...

1-07-1977 | This circuit is designed to indicate the onset of clipping in an amplifier on both positive and negative peaks. Clipping occurs...

1-07-1977 | Depending on type and the current flowing, • the forward voltage drop of an LED may lie between 1.4 and 2 volts. The temperatur...

1-07-1977 | his circuit can be used as a tuning indicator, instead of the more common pointer instru- ment. It gives a three-LED indication...

1-07-1977 | A disadvantage of the VU meters frequently used in hi-fi equipment is their inability to respond to short transients, which can...

1-04-1977 | VU (Volume Unit) meters and PPMs (Peak Programme Meters) are used widely in the recording industry and by the amateur to monitor audi...

1-07-1976 | On the basis of the principle that the conversion of electrical energy to light in a LED must be revers- ible, its merits for practical...

1-07-1976 | The µA 78G can be used to construct a very simple power supply which will deliver 1 A at any voltage from 5 - 30 V. The IC has fou...