Preheating circuit (CB7187E)

This circuit was found in a General Electric manual from 1970. Its purpose is to provide a preheat to a filament lamp.

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Burglar alarm (CB7428E)
This circuit was found in a Popular Electronics from the 90s. The components used are all common...
Overload Alarm (CB6082E)
This circuit is from a 60's documentation. The circuit uses components from the era and serves to...
Divide-by-5 Using the 4018 (NI005E)
One pulse in the output is produce at each 5 pulses applied to the input. The circuit uses CMOS...