This circuit tests the reverse voltage of power diodes. The transformer is high voltage and so are the rectifier diodes. The circuit is from a 1976 QST magazine.
Found in an October 1992 Radio Electronics magazine article, this circuit generates a low-power tone in...
In the figure we have the way to configure an OR gate using 3 gates of the 7400. The circuit is...
This circuit is basically the same configuration as the previous one with a power stage with...