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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Low Pass Second Order Filter 741 (CB25818E)
This unity gain circuit was found in the February 1995 Electronics Now magazine. The frequency is 10 kHz,...
Pulse Compressor and Expander (CB6658E)
Found in a 1967 Electronic Design, this transistorized circuit compresses and then expands a pulse....
Simple pulse extender (CB8921E)
This TTL pulse stretcher or stretcher was found in a 90's EDN. The time constant R x C1 determines...