The figure shows how to use CMOS inverters as amplifiers. The circuit is from a Radio Electronics from April 1984. The supply voltage can be between 3 and 12 V.
This alarm with sensors in series and parallel was found in the 1995 Encyclopedia of Electronic...
In the figure below we have the typical circuit of an automotive star alternator with the...
The circuit shown in the figure can be used as a high voltage indicator on a power supply line of...