Panic button (CB7077E)

Found in a 1968 Motorola publication, this circuit generates a high-powered audio tone when triggered. Equivalent transistors can be used.

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Clock alarm timer (CB21290E)
Found in Popular Electronics from the 90's, this circuit uses common components and can be easily...
Phone and CW FM Transmitter (CB16641E)
This small short-range FM transmitter was found in a 1987 documentation. It is intended for the...
Diodes Curve Tracer (CB1496E )
This circuit is connected to the inputs X and Y of an oscilloscope to display the characteristic curve of a...