4066 Latching Touch Switch (CB25241E)

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

Curve viewer on oscilloscope (CB23877E)
Published in Radio Electronics magazine in May 1963, the purpose of this circuit is to visualize the...
Mini amplifier (CB21958E)
Found in a publication by Gernsback from 1960, this circuit makes use of germanium transistors of the time....
Crystal Tester (CB3881E)
This circuit has been found in an old documentation and therefore uses a lamp as an indicator. In a...