View full size image. Measured by surface area, the Caspian Sea is the world's largest inland water body. The sea covers roughly 143,200 square miles (371,000 square kilometers) and borders five countries: Iran, Russia, Kazakhstan, Turkmenistan and Azerbaijan.
A logical device driver is a high level abstraction of how a device behaves. A physical device driver is a driver for a specific piece of hardware. The logical device driver talks to the physical device driver for you to keep you abstracted from the underlying hardware. For example, there are many different types of printers, and they typically come with their own drivers.
A LED driver is an electrical device that regulates the power to an LED or string(s) of LEDs.he power level (or âSpeedâ) of the LED is maintained constant by the driver as the electrical properties change (amount of âgasâ or power needed) throughout the temperature increases and decreases (or âhills and valleysâ) seen by the LED(s).