| The time-determining element in the present circuit is capacitor C1, which is charged via a current source based on T1. The voltage acros...
A. Rietjens (66)
| The tester generates two different signals for checking a digital storage oscilloscope. The first is a stepped voltage on to which glitche...
| 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...
| The byte-to-hex display decoder was designed because nibble-to-hex decoders are no Ionger produced commercially. In principle, it is of,...
| 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...
| Dur personal comfort is determined not so much by the ambient temperature as by the relative humidity of the air surrounding us.
| This nickel-cadmium (Ni Cd) battery charger is capable of charging up to eight cells individually. The power semiconductors needed to acco...
| This is the 'little brother' of the Maxi Micro Clock published in the previous issue of Elektor Electronics. A true miniature design, the...
| The UAA2016 from Motorola lends itself admirably to making a proportional mains-operated temperature control. A resistor with negative tem...
| 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...