Category Archives: electronics
LED Backlit Monitor from LG
LG intro new two LED backlit monitors namely E60 & E90. LED Backlit Monitor are very popular among consumers since it has many user friendly options. You can save power, it is available in slim, makes your picture perfect clarity.
Price of E60
20-inch – Rs. 9,940
22-inch- Rs. 12,200
23-inch – Rs. 13,000
Price of E90
21-inch – 16,900
Wireless Keyboard and Mouse
Microsoft launches wireless keyboard and wireless mouse namely Wireless Desktop 800.
Features-
- Secured Wireless Connection
- Battery Status Indicators
- Microsoft® Optical Technology
- Snap-in Transceiver
- Scroll Wheel
- Power Switch
- Longer Battery Life
- Easy-Access Hot Keys
for more info http://www.microsoft.com/hardware/mouseandkeyboard/ProductDetails.aspx?pid=131&active_tab=systemRequirements
price in India- 1,800 in rupees
ASUS – Lamborghini External HDD
External Disk is used to store digital data. Having one external hard disk drive is very very useful. There are many manufacturers producing hard disk drives. Now Asus newly launched ASUS – Lamborghini External HDD, which consists Lamborghini logo in the upper side. The Hard disk comes with two models one with 500GB storage and other one with 700GB massive storage.
Image and Source – ASUS
Programmable Interrupt Controller 8258
Interrupts can be used for a variety of applications. Each of these interrupt applications requires a separate interrupt input. If we are working with an 8085 microprocessor we get TRAP, RST7.5, 6.5, 5.5 and INTR interrupts inputs. For applications where we have multiple interrupt sources we have to use external device called a priority interrupt controller (PIC). By connecting such a device it is possible to increase the interrupt handling capacity of the microprocessor. The 8259A is a commonly used priority interrupt controller, which is specifically designed for use with interrupt signals INTR and INTA of Intel series. It is packaged in a 28 pin DIP. It uses NMOS technology and requires a single +5V supply.
Features of 8259A
- It can manage eight priority interrupts. This is equivalent to providing eight interrupt pins on the processor in place of INTR pin.
- It is possible to locate vector table for these additional interrupts anywhere in the memory map. However, all eight interrupts are spaced at the interval of either four or eight locations.
- By cascading nine 8259s it is possible to get 64 priority interrupts.
- Interrupt mask register makes it possible to mask individual interrupts request .
- It can be programmed to accept either the level of triggered or triggered interrupt request.
- With the help of this user can get the information of pending interrupt in service interrupts and mask interrupts.
- The 8259 A is designed to minimize the software and the real time overhead handling multilevel priority interrupts.
Display Interfacing
Most of the microprocessor controlled instruments and machines need to display letters of the alphabet and numbers to give directions or data values to users. This information can be displayed using CRT , LED or LCD displays. CRT displays are used when a large amount of data is to be displayed. In systems where only a small amount of data is to be displayed.
Interfacing Static LED Display
Consider a circuit for driving single seven segment LED display. For common anode, when anode is connected to positve supply, a low voltage is applied to a cathode to turn it on. Here, BCD to seven segment decoder, IC 7447 is used to apply low voltages at cathodes according to BCD input applied to 7447. To limit the current through LED segments resistors are connected in series with the segments. This circuit connection is preferred to as a static display because current is being passed through the display at all times.
Features of Display controller 8279
- IC 8279 provides a scanned interface to a 64 contact key matrix, with two more keys CONTROL and SHIFT.
- It provides three input modes for keyboard interface.
- Scanned keyboard mode
- scanned sensor matrix mode
- strobed input mode.
- It has built in hardware to provide key debounce.
- It allows in key depression in 2 key lockout or N key rollover mode, which eliminates software required to implement 2 key lockout.
- The interrupt output of 8279 can be used to tell CPU that the key press is detected, this eliminates the need of software polling.
- It provides multiplexed display interface with blanking and inhibit options.
CES 2011 (Jan 6- 9)
CES, Consumer Electronic Show to start on Jan 6th 2011 in Las vegas. Many companies to show off their products in the 4 days CES event. This year Verizon may introduce CDMA iphone. ihome audio system, also Toshiba to introduce Google TV devices, Laptops by MSI, New products from ioSafe, Also many companies to unveil 4G smartphones, Lenovo X120e ThinkPad, Hope this will be the great treat for tech and gadget lovers.
HP Touch Screen
HP unveiled DreamScreen touch screen display. It offers a complete entertainment package through internet like education, video chat, music, movies, news, browsing, temple darshans and much more… Airtel and TATA tele services are providing Internet connectivity options, Apalya for darshan, Bill desk for paying bills online, Edurite for education, Hungama for music and movies, India games for fun games, India today for media content, Music today for music. HP DreamScreen will be available and accessible in both hindi and english.
price- 19,999 in rupees.
Samsung scx 3201 Laser Printer
samsung scx 3201 is user friendly, multifunctional laser printer. samsung scx 3201 can print, scan and copy. samsung scx 3201 is the smallest laser printer in the world. It saves power so it is eco friendly. This printer has a 32MB memory toner saver mode and works up to 5000 pages monthly. It consists Any Web print software allows you to drag and drop content from different sources and add them in to one page.
price- 8999 in rupees.
Viewsonic VX2250WM full HD LED monitor price in India
Viewsonic VX2250WM full HD LED monitor requires less energy so that consumers can save power use. Don’t think when the energy saved then the picture quality will be low, this will offer best picture quality in low power consumption. It also has internal speakers and DVI & VGA inputs.
This LED monitor is slim and sleek design and looks perfect. So it is worth buying.
Price – RS, 8999.00
