LED Sequencer (CB21711E)

This is one of the many versions of this circuit that appear on this site. We got it from an internet documentation.

Two-Tone Buzzer (CB24121E)
This unijunction buzzer configuration appears in this section from many publications and sources. The...
Square root extractor (CB7804E)
In this interesting circuit from Popular Electronics, the output voltage is the square root of the...
Low voltage drop regulator (CB21166E)
This circuit was obtained from an old Electronic Design. The components are from the period but...