This circuit was found in Mullard's transistor application manual from 1960. More modern transistors can be used. The zener diodes used have the indicated voltages.
We found this circuit in a Radio Electronics from May 1966. Its purpose is to generate pulses...
This transmitter emits signals in the FM range, reaching a few meters away. The modulation...
This circuit allows 220 / 240V shavers to be used in the 110V network. The diodes can be general...