SCR Alarm oscillator (CB6114E)

This circuit was suggested by General Electric in a 1965 documentation. The circuit can be implemented with equivalent SCR.

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Signal Detector (CB24692E)
This circuit can be used to detect the signals from the previous circuit or from any radio...
Digital accelerometer (CB21045E)
Found in Popular Electronics from the 90's, this circuit makes use of components from the time. |...
Shortwave receiver (CB21205E)
This receiver for frequencies up to 18 MHz was found in American documentation from the 1990s. Data...