This circuit is from a Radio Electronics from March 1960. The generator works with a 22.5 V battery, generating good intensity signals determined by the LC circuit.
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...