Elektor Team (9517)

1-07-1985 | The special feature of this flashing light is the optical switch, which auto- matically switches the light on when it gets dark, and switche...

1-07-1985 | gotamilir Many railway modellers would love to have a track monitor panel, but, unfortunately, the few commercially available types do not j...

1-07-1985 | 11111.1111114111 Aneroid barometers invariably have two pointers: one that is operated by the mechanics, and one that is set manually. The m...

1-07-1985 | 7-96 g D MOSFET power amplifier The output power of an operational amplifier is often increased by a com- plementary emitter follower. It ca...

1-07-1985 | elektor july/august 1985 In radio and television studios it is customary to indicate to all concerned when the microphone or camera is "on t...

1-07-1985 | An LED indicator with a difference: three alternately lighting LEDs indi- cate a direction, for instance, in a model railway, or to an emerg...

1-07-1985 | fast opto-isolator When a computer drives external equipment, it is often required that the earths between them are electrically isolated fr...

1-07-1985 | 10141.41 video amplifier for B/W television sets It appears that the use of portable, mains operated television receivers as monitor in a co...

1-07-1985 | elektor july/august 1985 Anyone with a fascinating hobby must have felt at one time or another that there is not enough time available for h...

1-07-1985 | Dimmer circuits are always popular and this one offers two independent controls in one. Control of each section of the circuit is provided b...