Elektor Team (9517)

1-07-1984 | with variable pulse rate and pulse width The generator presented is based on two 555-timer ICs and provides rec- tangular pulse trains (wave...

1-07-1984 | with good accuracy at low frequencies Intersil IC type 7226B is just the right counter for a simple but reliable fre- quency meter which cov...

1-07-1984 | switches sounds electronically In a few situations it is desirable to be able to switch audio signals elec- tronically. One such situation i...

1-07-1984 | based on a current source The 78XX/79XX series voltage regulators have become so typecast in their main application that we tend to forget t...

1-07-1984 | exotic, perhaps, but not esoteric Perhaps it is a longing for nature in our technological society that prompts so many readers" requests for...

1-07-1984 | by opto-electronics It is true, of course, that it has been possible for many years to release a camera shutter remotely. But that is normal...

1-07-1984 | for alarm extension The "alarm extension" described in the September 1983 issue of Elektor, when used with a telephone cannot make a clear d...

1-07-1984 | use 8" drives with a 51/4" interface Someone once said "Small is beautiful" and we wholeheartedly agree with him. In the case of this circui...

1-07-1984 | with digital read-out The circuit presented is not only a suitable replacement of an existing mechanical rev counter, but may also be fitted...

1-07-1984 | july/august 1984 a power-photo transistor The 2N3055, strange though it may seem, can operate very well as.a photo transistor, as the circui...