Speaker of USB connection. With USB bus power supplying electricity from the personal computer, the product which operates is many.

Usually, the sound which is output from the personal computer the sound card (or the motherboard where sound function is integrated) at on from the digital data is converted by the analog signal, is sent the cable to the transmission [tsu] [te] speaker. When it is this system, influence of noise inside the personal computer is received and/or signal deterioration occurs with the cable, but in case of the USB speaker, sound while it is the digital data is sent by the speaker, the speaker converts to analog and outputs. Because of this, it is said that the high sound quality the speaker can be actualized in principle.

USB bus power <USB bus POWER>

Reading: U s B bus power
Field:
Personal computer > I/O > serial /USB > USB > USB bus power

The mechanism which from the computer itself supplies electricity to the peripheral device via the USB cable. As for the corresponding equipment the power cord/code being unnecessary, in order to USB it just connects to operate, degree of freedom of installation improves substantially.

The product of USB supply of electricity is many in the small-sized image scanner and external CD-ROM drive etc. There is also a unique “idea commodity” such as bracket fan and book-reading light. Because voltage 5V±5%, there is the restriction, consumed electric current 500mA and electric power consumption 2.5W, it is not possible, as for the equipment whose such as printer electric power consumption is large to make many equipment the beads connecting, those which are not corresponding it is many.

By the way, IEEE1394 bus power voltage 12V±5%, compared to consumed electric current 1.5A, electric power consumption 18W and USB bus power is a room in supply capability.

USB hard disk <USB hard disk>

Reading: U s B hard disk
Alias:
USB HDD
Field:
Storage > hard disk > USB hard disk

External hard disk of USB connection. USB is used in connection with the personal computer itself, the USB cable is utilized in data transfer and power source supply.

The USB hard disk, because USB version 2.0 (USB 2.0) with data rate the highest 60MB/s it accelerates, is the product which becomes generally. With the USB cable from the personal computer itself supplies power source to the peripheral device to the product which corresponds “USB bus power” to be many, just inserts the USB cable the easiness which can be utilized has gained popularity.

USB hub <USB hub>

Reading: U s B hub
Field:
Personal computer > I/O > serial /USB > USB > USB hub

The divergence device in order to install the plural USB equipment in one USB port of the personal computer itself. It is designed to be the structure which has the cable and four USB ports which are connected to the USB port of the personal computer itself. From the difference of supply of electricity system, there is a type such as the self power which with bus power and the AC adapter etc which from the personal computer itself supply electricity with the USB cable takes power source from the electrical outlet and the electric battery and battery power which designates the battery pack as power source. Recently the liquid crystal display which builds in the USB hub it is many.