'Push button memory (CB7243E)

This circuit was found in an American documentation from 1969. The circuit memorizes when a command pulse activates the relay.

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Oscillator for Square Signals (CB19014E)
This circuit, found in documentation from the 1980s, uses an operational amplifier from that time....
Wien Bridge Oscillator (CB9039E)
This low frequency sinusoidal oscillator was obtained in documentation from the 1970s. Operational...
Remote Vibration Transducer Amplifier (CB4951E)
This circuit was found in a 1980s documentation. It is intended for remote vibration monitoring...