| This circuit is designed to indicate· whether anyone has attempted to telephone the householder during his absence. If the te...
| This circuit is designed to indicate· whether anyone has attempted to telephone the householder during his absence. If the te...
| It is often necessary, particularly when experimenting with circuits, to make connection between the output of one circuit...
| It is often necessary, particularly when experimenting with circuits, to make connection between the output of one circuit...
| This simple ultrasonic (US) transmitter uses only one CMOS IC and a few discrete com- ponents, and will generate a short pul...
| This simple ultrasonic (US) transmitter uses only one CMOS IC and a few discrete com- ponents, and will generate a short pul...
| This `inaudible` car horn is intended for warning four-footed pedestrians of imminent danger, without needlessly scaring the (h...
| James Neill announce the introduction of the `MICRO 2000` electronic digital micrometer, a new hand-held precision measuring instrument p...
| Having discussed the basics of a synthesiser in last month`s introductory article, the second part of this series gets down to some of the...
| This circuit is intended to improve the sound of the `Digibell`, which was published in Elektor No 14(June 1976). The tones...
| The accuracy of a frequency counter is determined exclusively by the accuracy of the timebase being used. Thus if extremely precise measu...