Basic Latch (CB7981E)

This circuit can be applied to several logics. The circuit is from an Electronics Now from the 90s, using two push-buttons.

Simple Audio Mixer (CB12330E)
I found this circuit in an old document from 1981. The circuit can be implemented today with the...
CMOS Crystal Oscillator and Divider (CB16000E)
The circuit presented is a 10 MHz oscillator with crystal, which already has several splitters for...
Darlington Push-pull Stage (CB26252E)
This two-transistor amplifier stage was obtained from the Encyclopedia of Electronic Circuits...