A. Rietjens (66)

1-12-1993 | The time-determining element in the present circuit is capacitor C1, which is charged via a current source based on T1. The voltage acros...

1-12-1993 | The tester generates two different signals for checking a digital storage oscilloscope. The first is a stepped voltage on to which glitche...

1-12-1993 | It is often not possible to put a second bell in parallel to the existing one, because the bell transformer is normally already fully loa...

1-12-1993 | The byte-to-hex display decoder was designed because nibble-to-hex decoders are no Ionger produced commercially. In principle, it is of,...

1-12-1993 | The lamp in slide projectors is normally controlled with the aid of a triac in series with it. This method reduces the brightness of the...

1-11-1993 | Dur personal comfort is determined not so much by the ambient temperature as by the relative humidity of the air surrounding us.

1-10-1993 | This nickel-cadmium (Ni Cd) battery charger is capable of charging up to eight cells individually. The power semiconductors needed to acco...

1-09-1993 | This is the 'little brother' of the Maxi Micro Clock published in the previous issue of Elektor Electronics. A true miniature design, the...

1-07-1993 | The UAA2016 from Motorola lends itself admirably to making a proportional mains-operated temperature control. A resistor with negative tem...

1-07-1993 | The continuity tester is based on the well-tried ~A741, which is used as a comparator that operates a buzzer at its output. The inverting...