Lie Detector (T1534E)

This circuit was found in a Popular Electronics from December 1956. Power is provided by batteries.

Optical Shield for Medical Application (CB1556E)
The circuit shown in the figure is intended for medical applications where the sector in contact...
Ramp Generator (CB10040E)
This circuit was found in an integrated circuit manual from the 1980s. The circuit can be designed...
Triple 5 V Numitron power supply (CB8673E)
This 1969 Electronics World power supply has 5 V to power digital circuits and a 170 V output for...