Found in Popular Elecronics, this configuration also appears in this section, but obtained from other sources. The 14.4 V supply allows the circuit to be used in the car.
This circuit indicates the logical level of a CMOS circuit, extracting the power from the circuit...
Using a piezoelectric sensor of the time, this circuit was found in the February 1994 issue of...
The figure shows how to use an oscilloscope for diode test. The circuit presents the...