Found in Ferranti's 1969 documentation, this circuit can be mounted with a modern equivalent transistor. The circuit has a 4 V immunity and can be used as a shield for sensors.
Suggested by General Electric in an old documentation, this circuit can use modern SCRs and the...
The frequency of this oscillator depends on T, which for the audio band can be a common output...
This circuit has a common configuration widely used in projects on this site. The transistor is...