This circuit for alternating current loads has a built-in timer. SCR2 is according to the motor current and must be equipped with a heat sink. The circuit is from a 70s GE documentation.
This high voltage regulator uses only two passive components. The output is 100 V, but replacing...
This circuit was obtained in a magazine for radio amateurs 73 of the 90s. The circuit is based on...
This circuit is from an old operating manual and can be implemented with operationals types that...