Elektor Team (9503)

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...

1.07.1985 | Not so long ago, when semiconduc- tors were still quite expensive, it paid to make a transistor serve more than one function. Although this...

1.07.1985 | elektor july/august 1985 Even the best car alarm is useless if you forget to set it upon leaving your car, whence this circuit. The relay ha...

1.07.1985 | 1110011111041111 A novel use of solar cells makes pos- itioning your car in the garage rather easier than old tyres, a mirror, or a chalk ma...

1.07.1985 | 8-02 II twin keyboard for Apple II The keyboard supplied with com- puters is for many applications not the ne plus ultra it is claimed to be...