Elektor Team (11422)

1-07-1979 | The following circuit is intended as an infra-red lock for house doors, garage doors, etc. Since the `key` is almost impossible to copy, it...

1-07-1979 | Multiply X and Y and you get XY -all very simple and straightfor-ward -at least on paper. But what if X and Y are analogue voltages, which m...

1-07-1979 | Circuits for synthesising peak pro-gramme meters by using light emitting diodes are certainly not new, but the design shown here offers simp...

1-07-1979 | Il est souvent très utile de vérifier la valeur d`un condensateur suspect ou non marqué, ou de déterminer la valeur d`une inductance que l`o...

1-07-1979 | Derrière ce titre se cache un jeu d`adresse bien connu, dans lequel deux joueurs tentent chacun de faire passer un anneau le long d`un fil s...

1-07-1979 | For microcomputer enthusiasts and anyone working with large scale digital circuits, a ribbon cable tester can prove a usefu I aid.

1-07-1979 | In the world of model railways, electronics is playing an increasingly important role, and it is only a matter of time before the micro-proc...

1-07-1979 | With the aid of the following circuit a seven-segment display can be gener-ated on an oscilloscope screen. The height and width of the digi...

1-07-1979 | Les chargeurs d`accumulateurs automatiques ne sont pas particulièrement bon marché, mais la protection qu`ils apportent contre la surcharge...

1-07-1979 | To accurately measure the con-centration of hydrogen ions (pH value) in a solution, a `glass electrode` is often used in chemistry laborat...