In the figure below we have the connections of an automotive alternator in a triangle. The diodes depend on the current.
This detector or window discriminator was found in an old American manual. Comparators or...
The output voltage depends on the zener diode. Zener in the range between 1.2 to 12 V rated to 1 W...
This circuit uses a 100 kHz crystal, but nearby frequencies can be obtained with appropriate...