4066 Latching Touch Switch (CB25241E)

This circuit was found in the November 1989 Radio Electronics magazine. Power supply depends on the application.

Low Resistance Meter (CB12193E)
We found this circuit in a 1981 publication. Its purpose is to measure resistances of very low...
Square Wave Generator (CB12810E)
This circuit was obtained in an old Argentine publication, using germanium transistors and...
Super Siren 555 (CB24693E)
We found this circuit in the April 1982 Radio Electronics magazine. It contains a good power stage...