| A circuit is described that is a good compromise between complexity and accuracy. The results can be displayed on a standard digital vol...
| A circuit is described that is a good compromise between complexity and accuracy. The results can be displayed on a standard digital vol...
| This article looks at instruments and methods that can be used by both harn operators and shortwave listeners to get the most out of an an...
| Here is a simple way of making a tape counter that gives a ten-step indication with the aid of two ICs and a seven-segment display. Its g...
| Overcharging of batteries is prevented by the timely switching off of the charger. A timer that can be set to within a minute can be bui...