Less memory than specified a certain amount of memory is always taken up by the file allocation table. This is normal for any memory storage device, when the device is formatted first time; a file allocation table for a FAT is created. The FAT stores the locations of each file stored in the drive. The Fat takes very little space on the drive by default .all USB flash memory devices use the FAT32 type of partition.
Less memory than specified – a certain amount of memory is always taken up by the file allocation table. This is normal for any memory storage device, when the device is formatted first time; a file allocation table for a FAT is created. The FAT stores the locations of each file stored in the drive. The Fat takes very little space on the drive by default .all USB flash memory devices use the FAT32 type of partition.
In addition ,are pre installed with software that allows you to carry sensitive data in an encrypted format and back up data .The preinstalled software on your drive is usually installed in a separate partition .this causes the total available space on the drive to reduce further but not much.
USB is designed such that you can add up to 127 devices to one computer .This is accomplished through the use of hubs .In a effect the hub expands the number of USB ports. The most common hub is a 4-port unit which can be plugged into one of the USB connections on your computer, giving additional 4 USB ports.
The specifications of a USB states that the maximum length of the USB cable is 5 meters so you can not extend it more that 5 meters without using a USB repeater cable .This cable contains active electronics that boost the USB signal for maximum reliability and performance over extended distances. Up to 4 of these USB active extension cables can be linked to extend the distance between your computer and your USB peripheral to up to 80 feet.
But the best solution is a self powered hub with a fixed 10m cable that has a one port bus powered hub in the middle.
Applications
1Mobile phones
2 MP3 Player
3 Medical equipments
4 Digital cameras
5 Digital video cameras
6 GPS navigation systems
7 Other portable devices
8 Personal computers
9 Data communications
10 testing equipments
Electronic Sample
Crystal Oscillator
A crystal oscillator is an electronic circuit that produces electrical oscillations at a particular designed frequency determined by the physical characteristics of one or more crystals generally of quartz positioned in the circuit feedback loop
The Essential Role of Load Break Switches in High Voltage Power Systems
Load break switches play a crucial role in the control and safety of electrical power systems, particularly at high voltage levels. These switches are designed to safely interrupt the flow of electricity, allowing for maintenance or emergency handling without causing damage to the system or danger to personnel. With the ability to handle several hundred thousand volts, load break switches are a key component in ensuring the reliability and efficiency of power distribution.
Use of LED and Photodiode in Pulse Oximetry
Pulse-oximetry technology was available in 1930's it became easily available only in the 1980's with advances in the Light Emitting Diode (LED) microprocessors, optical plethysmography and spectro-photometry. Today pulse-oximetry provides a simple, non-invasive, portable and inexpensive method to continuously monitor oxygen saturation and heart rate with good accuracy
