This circuit was obtained from an American 1980s documentation. The frequency depends on the crystal and the circuit may be a PNP that reaches the generated frequency.
This circuit is from a publication about thyristors from the 70s. It consists of a pulse generator...
This circuit activates a relay, lighting a lamp when the sensor receives light. The sensor is a...
May 2017 - Mouser Electronics announces the availability of new Toshiba SSM6K N Channel MOSFETs...