Found in American documentation, this switch is based on the 4093. The load will determine the supply voltage. The transistor is general purpose.
The circuit in the Multisim Blue simulation sources a regulated voltage to loads up to 50 mA. The...
This circuit was found in a PC documentation from 1996. It can be used as a shield with modern...
Based on 74HC digital circuits, this circuit generates signals in three phases. The frequency...