This grounding test circuit was found in an American 80's documentation. The circuit is for the 110 V power grid but can be changed to the 220 V power grid.
This circuit was found in the December 1977 issue of Radio Electronics magazine. The circuit uses...
We obtained this circuit from an old Argentine magazine. The circuit originally uses germanium...
The 78XX series voltage regulator integrated circuits do not support an input voltage greater than...