This circuit is from a 1966 American documentation. The circuit uses a photo-FET, an unusual component today.
This two-transistor emitter-coupled oscillator circuit with capacitive feedback was found in the...
Found in an Electronic Design from the 80s, this circuit generates a 500 Hz signal and can be used...
This circuit is from a 1968 documentation. It makes use of thermistors (NTC) to indicate...