Sequential Flasher (CB7584E)

This circuit was found in a RE Experimenter Handbook from the 90's. The components are of the time, rare nowadays, except the 555 and 4017.

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Transistor static switch (CB9287E)
This static switch circuit or solid-state contactor was found in a Motorola documentation from...
DC Amplifier with Drift Compensation (CB14068E)
of the National Semiconductor of 1994. The same technique can be used with other operators and the...
Color Code Identifier (CB16353E)
Have you not yet memorized the color code used to identify resistors and capacitors? Do you have...