24 Hour Clock (CB6462E)

This circuit divides the grid 60 Hz frequency to obtain 20 Hz to drive mechanical watches used at the time. The circuit is from a 1970 CQ magazine.

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Optical direction discriminator (CB8079E)
Found in American documentation from the 90s, this configuration detects the direction of rotation...
SCR Charger CIR13730S (CB6397E)
Circuits similar to this can be found in this section. This is from 1967 General Electric...
LED Indicator (CB14962E)
This circuit uses two transistors and can be powered by just two small batteries. The frequency is given...