Touch Switch (CB6449E)

This resistive sensor was found in a 1969 US documentation. The circuit uses transistors of the time, but current equivalents can be employed.

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Light change detector (CB22058E)
This circuit only detects variations in light falling on the sensor. The circuit uses an LM380 as a...
Electronic Tornado (CB25108E)
This is the well-known lightning lamp that was published in the March 1988 issue of Saber...
Light relay (CB23551E)
This photoelectric cell light relay was found in Radio Electronics magazine from April 1958. The...