Described in the December 1969 Radio Electronics magazine, this circuit is intended to supply the previous circuit. The circuit is not isolated from the power grid.
This circuit was obtained in an old magazine from the 1970s. The circuit can still be assembled with...
This circuit was found in a Popular Electronics from the 90s. Transistors are general purpose...
This biestable vox circuit was found in an old documentation. The circuit makes use of components of...