Signal Detector (CB6663E)

This 1970 circuit triggers a load when it receives a signal. Components are common and SCR admits equivalent to load.

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Window Comparator I (CB24973E)
Using the CA3140 in the figure we have a comparator that goes low in the window voltage space. The...
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With this circuit it is possible to connect a comparator to a power stage via two wires. The...
LED Flasher 4069 or 74C04 (CB24586E)
This simple circuit was found in the May 1979 issue of Radio Electronics magazine. The circuit has the...