Voltage Dividers
Most electrical and electronics equipment use voltages of various levels throughout their
circuitry. One circuit may require a 90-volt supply, another a 150-volt supply, and still another a
180-volt supply. These voltage requirements could be supplied by three individual power
sources. This method is expensive and requires a considerable amount of room. The most
common method of supplying these voltages is to use a single voltage source and a voltage
divider. Before voltage dividers are explained, a review of voltage references may be of help.
Recall that some circuits are designed to supply both positive and negative voltages. You may
wonder if a negative voltage has any less potential than a positive voltage. The answer is that
100 volts is 100 volts. Whether it is negative or positive does not affect the feeling you get when
you are shocked