Suggested by a 90s Popular Electronics this circuit is intended to receive volleys or whistles from thunderstorms in the wave range below 20 kHz. The coil consists of 300 turns of wire 26 in a ferrite rod.
This circuit was obtained from an English magazine from 1985. It consists of a pulser that drives...
This circuit can measure the power of loads up to 1 kW and its accuracy depends on the settings and...
This circuit came out in an English magazine from 1978. The circuit generates a ladder of 128...