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.

Optically isolated switch with triac (CB25073E)
This circuit is an excellent shield for microcontrollers and was found in the October 1987 Radio...
Random Neon Flasher (CB14780E)
We found this circuit in a 1981 publication, when it was still possible to find 22.5 V batteries (used...
Grid Dip Meter (CB18293E)
This grid-dip meter was found in a 1956 documentation from Sylvania. It can be implemented with...