Information Technology Reference
In-Depth Information
© iStockphoto.com/aarrows
Figure.2 8
A power connector for a Serial ATA
(SATA) hard drive. The drive requires both +5 and
+12 power, supplied on the red and yellow wires,
respectively.
© iStockphoto.com/DonNichols
Figure.2 7
A desktop PC's power supply.
In addition to the
several types of
connectors that go
to internal devices
such as drives, the
power supply also
has one big con-
nector, containing
20 or more wires
arranged in two
rows. Figure 2.9
shows an example.
This connector
plugs directly into
the motherboard,
and powers all its
components that do
not have separate power connectors.
© iStockphoto.com/ebrink
Figure.2 9
This connector runs from the power supply to the
motherboard, delivering all the different voltages that devices that
connect directly into the motherboard might need.
On a notebook PC,
the power supply is
built in. The power
cord typically con-
tains a
transformer
block
(sometimes
called a brick) that
decreases and con-
verts the voltage.
Figure 2.10 shows
an example. When
a notebook PC is
plugged into AC
power, its battery
transformer block
A thick block built into a
power cable for a device that handles the conver-
sion of AC power to DC and decreases the voltage
to the level needed.
© iStockphoto.com/Nickondr
Figure.2 10
A power cord for a notebook PC includes a trans-
former block that converts the power to the type and voltage needed.
