This proximity relay circuit was found in the July 1990 Radio Electronics magazine. The supply voltage should be according to the relay used.
Although it is a common configuration today, this circuit was taken from an old publication. The...
In the figure we have the way to configure an OR gate using 3 gates of the 7400. The circuit is...
This circuit is intended for the control of a heating system motor with up to 10 kW of power. The...