Elektor Team (9510)

1-07-1981 | an effective scratch and rumble filter Many home-constructed audio amplifiers incorpor- ate scratch and rumble filters, but quite often the...

1-07-1981 | digit•al t.uning indicator Although the Japanese manufacturer, OKI, is less well known than some others, they are nevertheless important a...

1-07-1981 | 744 — elektor july/august 1981 objektor The aim of this circuit is to detect the presence of a conductive object, provided the object is w...

1-07-1981 | high input impedance voltage follower hones, as an It is common knowledge that Field Effect Tran- well sistors (F ETs) feature a very high i...

1-07-1981 | lam power levels as well. The IC contains an adjustable voltage reference and an accurate ten-step voltage divider. The input buffer drives...

1-07-1981 | The circuit shown in figure 1 meets these demands uately. It is a bridge version of the quite adeq PWM amplifier with an output power self-o...

1-07-1981 | simple swinging poster The original "swinging poster" circuit was published in the January 1981 issue of Elekta disco etc. As the circuit is...

1-07-1981 | K. Siol time six hour timer S1 therefore enables the operator to select a hours. As soon ass period of from one to six the transistor will s...

1-07-1981 | VOX for PA systems An annoying problem with PA systems is their tendency to whistle or "howl" due to feed back phenomena. There are a number...

1-07-1981 | law battery. 2 JL 125 NIV which may prove to be a little high for the 28 variable power "resistor A major difficulty encountered when testin...