Elektor Team (9510)

1-07-1985 | The opto-coupler in the normal com- mon emitter circuit at the output of a phototransistor is invariably too slow for use in data communicat...

1-07-1985 | A practically proven small circuit that is very popular with many model fliers, as it enables them to verify that their remote control trans...

1-07-1985 | The active rectifier proposed here is based on the property of an oper- ational amplifier that its output cannot become negative if its powe...

1-07-1985 | This is a much simplified version of the circuit published in the April 1984 issue of E/ektor, but it is, unfortu- nately, not usable with a...

1-07-1985 | 1 854231 max. 50 mV A simple millivoltmeter and an equally simple sine wave generator are ideal instruments for checking and testing audio e...

1-07-1985 | 4111110.004N g simple zero crossing detector Zero crossing detectors are often con- tained in rather complex circuits, or they are part of a...

1-07-1985 | 100 1k 10k 100k 1M 10M Os (0) 85455-1 To design a low noise amplifier, it does not suffice to choose a low noise opamp, because the componen...

1-07-1985 | It is sometimes useful, or even necessary, to use the same screen for more than one video source. Some simple video selectors used for this...

1-07-1985 | elektor july august 1985 A modem, such as the direct-coupled modem featured in the October 1984 issue of E/ektor, opens a whole new world to...

1-07-1985 | For some unknown reason, the Sinclair QL (and perhaps some other personal computers) provides positive, instead of the usual negative, field...