Full Comparator (CB6548E)

Applying an operational of the time, this circuit of an old documentation can be elaborated with modern operational. The feed must be symmetrical.

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2-Transistor MW Radio (CB18309E)
This commercial circuit is from a Japanese magazine from 1967. It uses germanium transistors, and...
Darlington Power Switch NPN (CB991E)
This circuit can be used to drive relays, solenoids, motors and other loads according the...
Whistle Remote Control (CB4295E)
This circuit is based on the small keychain that responded to the sound of a whistle and were...