5 V reference LT1027 (CB14595E)

This circuit is from the 1993 Linear Technology Applications Databook. The component is uncommon today.

LDR Controlled Flasher (CB6763E)
We found this circuit in a 1965 General Electric manual. The circuit applies to incandescent lamps only and...
Lie Detector (CB11486E)
This simple circuit was obtained in a Portuguese publication in 1979 but can be easily assembled with...
Outdoor light controller (CB7870E)
In fact, it is a night light system that automatically turns on the outside lights when it gets...