Lie Detector (T1534E)

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

AC Motor Reversing Circuit (CB15408E)
We found this configuration in the ON Semiconductor thyristor manual. The triacs depend on the...
Oscillating flyback converter (CB9616E)
This circuit was found in an old documentation. It converts DC voltages and its maximum current...
Window Comparator (CB15267E)
This circuit makes use of comparators and common operational amplifiers, having been found in...