Computer News Archives

Selling Yourself Online

Thursday, December 3rd, 2009 at 4:33 am  
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JOB search has never been easy for us.  Information Technology however brought about a system where job hunting wouldn’t be as difficult, tedious and costly as it was years back.

Job vacancies are usually seen posted outside an entity, job listing published in the major dailies or announced over the radio, broadcasted on television programs or by sheer word of mouth.

Under these circumstances, an applicant undergoes the tedious process of having to fill up application forms, accomplish a bio-data, line-up along with many other fellow jobless individuals applying for the same position that you are yearning to get, attending a series of invitations for purposes of undertaking a series of examinations and interviews before one finally gets to know if he’s hired or will have to try his luck next time and elsewhere.

The tedious process is already a thing of the past.

Modern-day Job Search

Today, there is a simplified way to search and hopefully land a job. The evolution of Information Technology has brought in online job search engines, where we get a consolidated listing of the jobs we want based on the qualifications that we have, salary we desire and location where we intend to work.

With a long list of job search engines, an applicant (who could either be unemployed or simply unhappy or discontented with his or her present job), will have to refer to the web. These job search engines allow filtering of the data under the keywords section, which refines the job listings.

Upon identifying a job vacancy, an applicant has to explore the job search system and follow instructions as to the proper way of online submission of job applications. It is also through this system that we submit our bio-data (containing personal data, educational attainment, family background, work history and other credentials) from where we would be sized up, qualified and short-listed.

From there, an applicant is notified via electronic mail on the status of one’s application.  There are also job search engines providing updates on the status of a job application.

Short-listed applicants may also take the examination and interview online using electronic mailing system and instant messaging system (Yahoo Messenger is one of them). In some instances, interviews are conducted online using webcams.

Job Search Engines

Job Search Engine is a website where we could actually get hundreds of thousands of job listings for over a wide range of fields of inclination, expertise and profession

It is also called an employment website, which caters exclusively to employers and job hunters. In this type of website, employers get to post job vacancies (along with the qualifications and requirements) are posted. These job vacancy posts are viewed by millions of job hunters from where they get to choose where they’re more inclined to work based on the stuff they are made of.

These websites also offer free services, which include suggestions, recommendations and advise both for the employers in need of workers and the applicants in search of work.

They’re Everywhere

A data released by the International Association of Employment Websites, tells that there are actually over 40,000 job search engines that we could actually find in the web. These jobs search engines facilitate millions of job-related concerns.  GP

ITC Sales are a leading supplier of Dell and HP Laptops and Desktops such as the Dell Precision and the Dell Optiplex

Article Source:http://www.articlesbase.com/hardware-articles/selling-yourself-online-1535839.html

Control and monitoring of multiple devices via computer interface

Wednesday, December 2nd, 2009 at 3:04 pm  
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 Control and monitoring of multiple devices  via computer interface

                                                           1James Agajo, 2 A Sylvester Ezewele  

             Department of Electrical/Electronics, Federal Polytechnic, Auchi

Edo State ,Nigeria, Email:  agajojul@yahoo.com, Phone: +2348053312732

Abstract: Control and monitoring of multiple devices  via computer interface  suggest way of  controlling  device via the internet, various interfaces were discussed,  procedure for testing was also analysed, software used were also shown

Keyword: Control, switch, microcontrollers, computer

 Introduction

There has been continuous quest for man to improve his well being through, reactions to problems and challenges posed by his environment. Over the years, computer and computer communication had gained so much attention and grown tremendously, reducing big and expensive mainframes into small and affordable devices. Statistics have shown that most people spend most of their time on computers, since most of their activities locally or globally over a network. Since much time is spent on computer system, it becomes necessary to design a device for controlling switches from computer. Switches are so essential that one can not avoid to use them on a daily basis for putting on or turning off electrical devices, and as a result of these, many devices have been designed by man to help him conquer these problems and challenges posed by physical contact with electricity. The switch control system can range from simply controlling of light without leaving a seat, to being able to switch on industrial electrical devices through a computer. There has to be an interface between industrial electrical devices and a controller, the PC in this case. Interface are required so that the PC can communicate with other devices (Osinuga and oresotu 2001), the interface used in this work is the computer port interface. The microprocessor switch control system is made up of several devices connected together; keypads that transmit commands to the device, fixtures controller that is programmed to on the appliances automatically via a computer system. [1]

 

   MICROPROCESSOR- BASED SWITCH CONTROL SYSTEM:

Yong- Jing Nu (1998), observed that microprocessor based toggle switch control system is primary configured with a power factor corrector (PFC), a square- ware voltage generator, a manually controlled toggle switch and two relay. Toggle switch can select a different number of lamps in operation, resulting in a manual dimming feature.[2]

 

 METHODOLOGY

Software Engineering has internationally accepted software Engineering standards for transforming ideals into an inference engine. They include:

v     The structured system Analysis and Design methodology (SSADM)

v     Prototyping

v     Experts system methodology

v     Usability Engineering methodologies, etc.

 

The methodology applied in the system is prototyping and is discussed below.

 

3.0 duction                                                PROTOTYPING

In electronics, prototyping means building an actual circuit to a design to verity that it works, and to provide a physical plat forms for debugging it, it does not work. Prototyping sometimes converts intangible specifications into a tangible but limited working model of the desired information system. [3]

 

CLASSIFICATION OF SYSTEM PROTOTYPES

System prototypes could be classified into:

  1. Evolutionary prototype:  This design is adapted for permanent use after the ideas are clarified and must be built using the program tools that will be used for the final system.

 

  1. The throwaway prototype: This design is to be discarded after utilization, basically it is to test ideas and is especially useful for comparing alternative designs for part of a system.[3]

 

STEP INVOLVED IN PROTOTYPING

  1. Identify the user’s known information requirements and features needed in the system.
  2. Develop a working prototype.
  3. Use the prototype, noting need enhancements and changes; this expands the list of known system requirements.
  4. Revise the prototype based on information gained through user experience.
  5. Repeat these steps as needed to achieve a satisfactory system.

 

  ADVANTAGES OF PROTOPING

  1. Requires user involvement.
  2. It helps to refine the potential risks associated with the delivery of the system being developed.
  3. Prototyping facilitates system implementation since users know what to expect and exposed developers to potential future system enhancements.
  4. User can point to features they like or dislike and so indicate shortcomings in an existing and working system more easily, and then they can describe them in a theoretical or proposed system.[4]

DISADVANTAGES OF PROTOTYPING.

              I.      The process of developing a prototype can cause systems to be left unfinished or implemented before they are ready.

            II.      Prototyping can sometimes leads to incomplete documentation and insufficient analysis.

          III.      The process of developing a prototype may require greater involvement and commitment by key users who are already busy with their regular work.

         IV.      If sophisticated software prototypes are employed, the time saving benefit of prototyping can be lost.

           V.      In prototyping, structure of system can be damaged since many changes could be made and it is not suitable for large applications.

 

Our prototype in this project is constructed using a microprocessor to control electrical appliances.[5]

 

  ANALYSIS OF THE EXISTING SYSTEM

The present procedure involves a manual control of the power switch by the industrial electrician. The power control switch is operated with hand by pushing the switch lever to on position if it’s intended to be turned on or off position if it’s intended to be turned off. Basically, during the analysis of this procedure, it is discovered that the operators is at high risk of been electrocuted. Manually, switches have been existing for many years in every home, industry, company, schools and colleges. [6]

These switches are in different standards such as:

  1. ON- OFF e.g. toggle switches – it is used to switch the power supply of a circuit. When used with mains electricity, this type of switch must be in the lives wires.
  2. (ON – OFF) push- to- make switch is for doorbell.
  3. (ON – OFF) push- to- break switch is also for doorbell.

This switch can be “ON” in both positions, switching on a separate device. In each case, it is often called a change over switch example; a SPOT switch can be used to switch ON red lamp in one position and a green lamp in another position.

 

REED SWITCH:

The contacts of a reed switch are closed by bringing a small magnet near the switch. They are used in security circuits, for example to check the doors and closed. Standard reed switches are SPST (simple ON/ OFF)

 

THREE FEATURES OF EXISTING SWITCH

         Contacts (example single pole, double throw)

         Rating (maximum voltage and current)

         Methods of operation (toggle, slide, key etc.

 

                        THE PROBEM OF THE EXISTING SWITCHES (SYSTEM)

v                 Electrocution: Those switches claim a lot of lives as a result of direct contact of the operator with them for example; the operator might be electrocuted in the process of carrying out power change over.

 

v                 Time wastage: it takes time to go from one switch to the other to ON or OFF them whenever there is power failure.

 

v                 Friction: friction is applied in operating these switches. Worn out switches can lead to the damage of the electrical devices which it is controlling.

 

v                 Frequent touching of the switch causes the damage of the switch circuit.

 

v                 Bad switch control might result to serious inferno to industrial equipment and other valuables.

 

 

SWITCHING CIRCUIT

This circuit is made up of BC 337 transistor switching circuit; each circuit is connected to a relay, a transistor and diode. The relay when activated, ON or OFF any appliance connected to it. The three lives from the microprocessor are each connected respectively to the BASE pin of the three corresponding transistor.[6]

 

The circuit is the heart of this module. It comprises of 9-pin Dip-male connector, Max-232, 8051 microprocessor, crystal oscillator.

 

 The circuit connects directly to the computer serial port through a pin cable. The MAX- 232 amplifies signal (VS) that goes into the microprocessor from the computer system through the serial cables. Serial data is transmitted from the PC as a series of positive and negative voltage on a single wire, which serial data occurred at a pre-determined time established by the base wire.

 

The 11-0597MHZ crystal oscillator determines the speed of the 8051 microprocessor used. The microprocessor is connected to the three BC B37A transistor that derives the three relays. Pin 2 an d3 of the serial port are connected to line 14 and 13 of the MAX- 232. [7,8]

 

 

 HARDWARE REQUIREMENTS

 

v     Microprocessor

v     Relays

v     AC bulb

v     Capacitors

v     LEDS

v     Switches

v     Transistor

v     Resistor

v     Diode

 

INSTALLATION PROCESS

The set up program prepares your computer to stall the software from the CD.

 

To install the program;

v     Insert the CD, in the CD program;

v     Double click on CD my computer

v     Double click on CD drive icon

v     Double click on setup icon

v     Follow the screen instructions to complete installation.

 

                

 How to open the software

ü      Click to view start menu

ü      Click on all program

ü      Click on control

ü      Finally click on control

 The interface will appear:

v     Check the ON/ OFF box and click on desired relay button

 

v     When the status is B or D or F the relays are ON, but when the status is A or C or E then the relays are OFF.

 

USER’S GUIDE (MANUAL)

 The user’s manual for the system will accompany the software CD. The aim of this manual is to guide the users on the appropriate steps to follow[9,10]

 

 HARDWARE GUIDE

The switch controller must be connected to the system unit. The guide on how to connect it to the computer are:

 

v     Insert the serial cable female port into “D- shape male 9- pins serial port at the back of system unit and screw.

v     Connect the power cable into any power source of 240V

v     Make sure the computer system cables are properly fixed.

 

TESTING:

Software or hardware testing is very important element of assurance and it represents the ultimate view of specification, design and coding. The main thing here is to execute a program with the intent to search for an error. If the program executes without any notable instate; there the objectives of conceiving it is achieved.

 However, the free flow of the software was realized by removing bugs at early stages of the software development and the hardware was also realized by proper soldering of the components used on the breadboard

 

The New software and hardware project shall be tested thoroughly ensure that it meets the requirements in the specification. Macro et al stated that there are five stages of system testing or levels. These include;

v     Function Testing: The functions and modules that make up the module are tested to ensure their correct operation.

v     Module Testing: The functions are combined to form a module. This module is tested to ensure that its performance meets specifications. In this design the modules, which are tested and it responds positively which shows the modules are independently efficient and reliable.

v     Integration Testing: This is some time called subsystem testing, a set of modules are integrated. As software module and hardware module interact, the testing focus is on modules interface because it is assumed that the modules themselves are correct. This test is carried out to ascertain that those modules do not loose their efficiency and reliability by integrating them into subsystems and systems.

v     Total program testing: sometimes called system testing is the level where all the testing process concentrated more on detecting errors and determining how well user’s requirement are meet.

 

 

PROGRAM DOCUMENTATION (OPERATION)

  Microprocessor- based main switch control system, is a system consisting of software and hardware module. The hardware module is the controller circuit, which must be connected to the system unit and the software module is in a CD-ROM and needed to be installed in the system unit (hard disk). This will only take effect when the controller is properly connected to the computer system through the serial port and to the power source. Any electrical device connected to it can be switch on or off through the interface provide by the software.

Depending on the previous by the software bulbs, when the command button of any relay is clicked, signals goes from there to desirable bulb.

 

When relay 1 is off the status will display “A” but when it is ON, the status will display “B” .

Also when relay 2 is off the status will display “C”, when it is ON the status will display “D”.

Finally when relay 3 is off the status will display “E” but the relay is ON the status will display “F”.

 

IMPLEMENTATION DETAILS

This detail involves the conversion of files, parallel or pilot implementation plans. This involves the change- over procedures. Once the system has been fully designed, tested for a good percentage of perfection and accepted, the change over plan can be made. So this plan is done using the two types below:

 

ü      Parallel change over

ü      Pilot change over.

 

PARALLEL CHANGE OVER:

This system will allow the new system to continue along side with the old system, for weeks or months. The disadvantage of parallel running is the extra effort required to keep both system running.

 

PILOT CHANGE OVER:

Here, the new system is introduced into one of the department or branches of an organization and run until it is proven to be satisfactory. Then if it works with little or no shortcomings, it can then the installed in all the organizations and department or implemented fully everywhere as the case may be.

 

For this project both change over plans will do, but we are implementing the pilot change over plan because this new system has so many advantages over the old system.

 

CONCLUSION

This work is recommended to be used in industries, large firms manufacturing industries e.t.c. This is to provides easy and safe use of the electrical devices; Instructions are programmed into the microprocessor to carry out their functions. The management of any organization using this project should employ computer analyst who will be operating this system.

   The primary objectives of this project is to control electrical devices with computer through serial port was achieved successfully. The microprocessor in the control unit was programmed using assembly language.

 

REFERENCE

[1] Addison, Wesley k. and Takashi 9 (1990) Power electronics for the 

microprocessor Age, Oxford University Press.

  1. [2] Alluwalia. A and yeralan: Programming and interfacing the         
  2. [3]  Anigbogu  S.O ( 1997) Basic computer electronic and logic circuits Christon      

International Company LTD, Awka.

[4] Beyond Logic (2008), Interfacing the serial RS-232 Port, (http//www.Interface com/ MAX-232/html)

[5] Boylston, R.L.,and L Nashalsky. Electronic Devices and

[6] Chris Kotoroski, (2008) A push –to – break breaks  word toggle switch.

Circuit theory. Prentice – Hal/ of India private Ltd., New Delhi, 8th edition, 2004.

[7] Douglas, V.H; Microprocessor and Interfacing” .Tata McGraw-Hill, New Delhi; 2nd Edition, 1999.

 

[8] Hennessy, J,L and Patterson D.A (2002),  Interfacing the serial RS-232 Port

(http//www.interface.com/Max-232/html).

 

[9] Hughes Edward; Electrical Technology, ELBS and Longman group; 4th  

Edition, 1972 8951 micro controller adhesion_ wesley,1995.

[10] Ismail, and V.M Rooney, (1987) Microprocessor Hardware and Software Concepts IT Press, Chicago.

 

 

 

 

James Agajo is into a P.H.D programme in digital signal processing related area, he has a Master Degree in Electronics and telecommunication Engineering and also possesses a Bachelor degree in Electronics and Computer Engineering from the Federal University of Technology Minna Nigeria. To he's record he has carried out researches in various areas as it concern telecommunication with particular emphasis on wirless communication network. His interest is in intelligent system development with a high flare for Engineering and Scientific research.He has Designed and implemented the most resent computer controlled robotic arm with a working grip mechanism 2006 which was aired on a national television , he has carried out work on using blue tooth technology to communicate with microcontroller. Has also worked on thumb print technology to develop high tech security systems with many more He is presently on secondment with UNESCO TVE as a supervisor and a resource person. James is presently registered with the Nigeria Society of Engineers.

Article Source:http://www.articlesbase.com/hardware-articles/control-and-monitoring-of-multiple-devices-via-computer-interface-1531757.html

Graphing Calculators – HP 50g and the HP 40gs

Tuesday, December 1st, 2009 at 4:00 pm  
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If you are looking for the right graphing calculator that will help you resolve intricate and compound statistical and mathematical problems with ease then the HP 50g and the HP 40gs makes up for the right investment. Designed with multiple functions that are useful for students and teachers as well as professionals in research fields like science, maths and engineering, the calculators are very reasonably priced and will suit every pocket. Those who are loyal users of the HP 50g and the HP 40gs calculators will cite thousands of reasons why these two are the worlds best. Infact most of these professionals cannot work without these calculators sitting on their desks. It’s not because they are addicted or do not know how to arrive at results, but because these calculators are powerful, quick and even accurate, which is excellent for their professional requirements.

HP 50g graphing calculator

This calculator is said to be the ultimate among all the other graphing calculators that are doing the rounds of the market. Professionals working in survey, engineering, science and mathematical fields rely on its abilities for a quick and accurate response. The HP 50g calculator also has a SD card slot that allows for formatting functions as well as textbook data entry, RPB and Algebraic entry. This calculator is exactly like a palm held computer with a huge memory space of 2.5MB as well as 512 KB RAM and 2MB ROM which can be reformatted as per your requirement. Another boastful feature of this graphing calculator is its 2300 and more built in functions which are excellent for both students and professionals. The CAS allows users to perform calculus functions and complicated arithmetic with much ease. The graphical representation can also be chosen in either 2D or 3D expressions as per your requirement.

HP 40gs graphing calculator

This calculator like the HP 50g is also excellent for professionals, students as well as teachers. There are not too many functions that are different from the HP 50g calculator; however this is a little older version and was launched before the HP 50g. Although not as fully built as the HP 50g, the HP 40gs is equally competent and many still prefer using this calculator. Infact this calculator as well has a memory that is inbuilt. The total storage space is 256KB which assists not only in storage of applets and programs but also aid in better performance of the calculator. This model of the HP graphing calculator has more than 600 built in functions that take care of every requirement of students as well as teachers. Teachers and students can also make use of the 29 constants and metric unit conversions that are easy to use and are important for solving both mathematical and scientific problems. Programming of applets, formulas, equations is easy  and hence can be termed as a great assistant in studying interactive history, sketch capabilities and notes so that they can be reviewed later.

Both the HP 50g and the HP 40gs are excellent value for money and with the 24 hour customer support these graphical calculators are a must.

Are you attempting to buy Graphing Calculator? Or maybe external hard drive? Check what esle you can buy here!

Article Source:http://www.articlesbase.com/hardware-articles/graphing-calculators-hp-50g-and-the-hp-40gs-1527901.html

How to Find Out the Suitable Computer Drivers?

Monday, November 30th, 2009 at 9:57 pm  
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Do you think looking for a compatible driver for your computer device among thousands of tons of drivers is a rather tedious task? Don’t worry. Many people have the same thought as you. And things will get clear till you read this article.

Above all, only when you know what the brand and the model of your device are, you can probably get the solution. You can find your device name from its packing box, manual or warranty card etc, on which there will be some information about your device. But what if you don’t have any of these materials? Never mind. You also can find this information in your computer.

Step 1 Click Start and select Control Panel.

Step 2 Double-click System, choose Hardware.

Step 3 Select Device Manager and open the Device Manager sheet. There you will see all the names of your hardware devices that already exist in your computer.

Once you seek out the device name, you can go on the next step. Usually you can search the suitable driver from some large driver download websites like No device. For example, if you want to find a common Nvidia Geforce FX 5200 video card driver, you can index your device driver links by company name and by device type. Or you can search it in the Search help by putting Geforce FX 5200 into the first tab, select Drivers in the second tab and then click Find. There you will get a lot of related drivers. Next according to the version or the introduction described in your manual as well as the operating system you are using, click Download on the right side and then enter the related page to get the driver you need.

Additionally, there are many automated software like Driver Checker that take this boring task and simplify it down to a couple clicks of a button. Such tools can not merely search for the suitable drivers for you, but also install and update them automatically and avoid so many bothers.

The author, Molly Smith, is an expert of device driver problems repair and PC optimization. Do visit http://www.driverchecker.com/ for more free and useful information.

Article Source:http://www.articlesbase.com/hardware-articles/how-to-find-out-the-suitable-computer-drivers-1523827.html

Wind Up Latitude C840 AC Adapter for a Dell Laptop, How?

Monday, November 30th, 2009 at 12:20 am  
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Dell Latitude C840 AC Adapter 20V 4.5A Description: (http://www.papatek.com/Dell-Adapter/Dell-Latitude-C840-AC-Adapter-20V-4.5A.html)
Input: AC100-240V (worldwide use)
Output: DC20V 4.5A
Power: 90W
Outlet: 3-prong
Connecter size:  Special 3 hole tip
Item Includes: AC Adapter and Power Cord
Performance: Short Circuit Protection and Overload Protection
Condition: new
100%OEM compatible, guaranteed to meet or exceed OEM specifications!

Dell Latitude C840 AC Adapter Warranty
12 months warranty
For return of non-defective product within the first 10 days from date of purchase, full refund.
Within the whole product warranty days, unartificial defective product returns are accepted for replacement, and we will afford all shipping fee.

Remove the battery from the drill, and place it aside. This won't be used for this project, but you may wish to save it in case you ever wish to use the drill again. On the wire leads that connect the drill to the battery, identify the positive and negative wires. If in doubt, check the markings on the battery, or test the charged battery using the voltmeter to determine which terminal is positive and negative. Now, connect wires to the positive and negative leads.
Connect the opposite ends of the positive and negative leads to the car cigarette-lighter plug-in Dell Latitude C840 AC Adapter. This will give you a 12v outlet to plug any DC device into. Install a 10 amp diode between the drill and the outlet. This acts like a one-way valve to prevent the drill from attempting to use the laptop's battery power to spin itself. You may also wish to wire your voltmeter in serial with the flow of Dell Latitude C840 AC Adapter power to measure how much electricity your cranking is producing.
Plug your DC to Dell Latitude C840 AC Adapter into the cigarette lighter outlet. This will provide a normal, household style, 120v electrical outlet to plug small appliances into. Any other device that has a 12v power outlet such as a cell phone charger can also be hooked up to the cigarette lighter outlet, avoiding the need for an inverter.

Things You'll Need:
Any 12v power drill
Old-fashioned hand drill
DC to AC inverter rated at 120 watts or more
10 amp diode
Voltmeter
Car cigarette-lighter plug-in

See more information, you can visit: http://www.papatek.com

http://www.papatek.com locates in Santa Clara, is a direct sales office and service center of our replacement IT parts manufacture. We currently supply brand new AC Adapter, Rechargeable Battery, DVDRW Drive, LCD Panel, Laptop Keyboard, Floppy Disk Drive and many others for almost all name brand laptops and printers.

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The best brand new Acer tm00741 laptop batteries

Sunday, November 29th, 2009 at 9:43 am  
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How can you care Acer tm00741 laptop battery to get the maximum life out of it?

It is a question we frequently asked. It's a valid question since laptop batteries are usually expensive to replace.

First of all, how long should your battery last? 2-4 years is generally acceptable depending on how frequently you use and charge the battery. If you travel a lot and use and charge your battery frequently then you might only get a couple of years at the most out of your laptop battery.

The Acer tm00741 laptop battery are usually made with Li-Ion laptop batteries and the very nature of Li-Ion batteries is that they have about 500-600 charges and last at most about 4-5 years (shelf life). They also have a self-discharge rate of about 1% per day so you need to be sure to charge them at least every 6 months.

What should you do to keep your laptop battery healthy?

1.) Always use your laptop on a hard surface.

Laptops are portable and it's easy to set your laptop on your Acer tm00741 laptop battery or on your bed or use it at your lesiure. That's one of the benefits of having a portable computer. Flexibility. But if you want to extend your battery's life you have to watch out for overheating your laptop.Heat is one of the biggest obstacles to battery's life longevity. Your laptop computer fan cannot circulate the air properly when your laptop is sitting on soft surface.

2.) Do not keep your battery installed when use your laptop on AC for an extended period of time.

While your laptop is undoubtedly using a smart charger to charge even a constant trickle charge over months can reduce your battery's life. For best results, only charge your Acer tm00741 laptop battery when you need to charge it, don't leave the laptop battery plugged in all the time.More importantly than the trickle charger affect is the 'storage' of a Li-Ion battery at elevated temperatures. The optimum storage temperature for a Li-Ion battery is at 0 deg. C. The optimum storage charge level is about 40%. Unfortunately we tend to store fully charged and at the temperatures found in a running laptop you'll find a significant reduction in battery for your laptop performance after only 12-18 months.

3.) Use a full charge cycle before recharging

Li-Ion and NiMH battery (which most Acer laptop battery are), do not have a memory which you might find in NiCad batteries. However, each chemistry has a limited number of charge cycles, so use a full charge cycle before re-charging to maximize your Acer tm00741 laptop battery usage. Because this may be very difficult to manage, you'll need to consider the cost-benefit ratio for keeping track of how far discharged the battery is before you charge it again.

4.) Be careful where you store your laptop

This goes back to the heat issue. Don't leave your Acer tm00741 battery in the car where it can get very hot.Batteries hate heat and your battery will go on strike permenantly if you expose it to too much heat.Remember that all laptops are not created equal. You may have gotten 4 hours from your last laptop while on laptop battery , but your new laptop might pull more juice to run that gaming quality processor, or the power hogging programs you're running now. Read your owner's manual to find out what you should expect from your laptop battery and be sure to compare apples to apples when purchasing a replacement Acer tm00741 battery. Not all laptop batteries are made to the same specs. We recommend buying a battery that has at least as much capacity as your original battery (that's the mAh rating), and preferrably the same chemistry as well.If you simply aren't sure what to get, check with a professional. Our customer service staff are trained to know how to compare Acer tm00741 laptop batteries and they are happy to help you find the right fit for your laptop.

http://bestlaptopbattery.co.uk

Article Source:http://www.articlesbase.com/hardware-articles/the-best-brand-new-acer-tm00741-laptop-batteries-1517469.html

An Insight Into Buying DVD Storage Racks Online

Saturday, November 28th, 2009 at 5:04 pm  
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Digital Video Discs or Digital Versatile Discs are the latest in the world's optical media and thousands of people are adding more and more DVDs to their collection. With so many discs in your possession one soon starts getting fed up of arranging them with every new purchase. Preserving the DVDs in the old time traditional slotted system is becoming more of a hassle when your collection increases. Then you start thinking of shopping for the new DVD storage racks.

There are ever so many online sites which offer a variety of racks and it is pretty difficult to decide what to select. DVD storage racks come in different shapes, colors, sizes and are made from all sorts of material like wood, steel, glass, fiber glass and so on.

Before buying a DVD storage unit plan out your requirements so that when you shop you know exactly what you are looking for. With the advent of the internet you have the option of searching for your storage racks from the comforts of your home, without having to expend time, energy and money hopping from showroom to showroom looking for what you have in mind.

With the increase in the number of people buying DVD storage equipment, more and more traders have started advertising their wares online. By doing a research of storage racks online you will also get to know the different varieties that the stores have on offer and you may even see a lot more than what you may have in mind, giving you far better options to choose from.

You will find online stores displaying racks that stand on the floor, racks that can be mounted on the wall etc. If your collection of DVDs is on the higher side it would be advisable to look for the racks that can hold a larger number of them. Ensure that you find one that suits you best. There are many shopping guides online that help to give you the right advice regarding the Digital Video Disc storage racks.

You have a wonderful choice when you start searching the internet for these sorts of racks. There are revolving storage towers that occupy far less space. Then you have the ones with glass shelves and can be adjusted, but of late many people are opting for the ready-to-assemble type of DVD storage racks that can be assembled and disassembled within a matter of minutes.

Online shopping is definitely the best alternative when looking for Storage racks as you get to select a rack from a wide assortment of products and you have the option of comparing costs and also avail of discounts that companies have to offer.

DVD has opened up the world of film to the masses in a way that no one could have anticipated just a decade ago. Today the idea of DVD storage rack is used almost by all the professionals. To know more about buying this hardware you can visit http://dvdstoragerack.net.

Article Source:http://www.articlesbase.com/hardware-articles/an-insight-into-buying-dvd-storage-racks-online-1516061.html

Customized load sensors available for sale online

Saturday, November 28th, 2009 at 3:12 am  
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Do you need a device that can convert a force into an electrical signal? Then you are looking probably for a load cell. A load cell is an electronic instrument, a converter used only to convert a force into an electrical signal.

Although there are many types of load cells, strain gage based load cells are the mostly used. On the other hand, digital load cells convert a load into data readable by a PC without any need for additional signal refreshers. You just need to connect your digital load cell to your USB port and that is it, you can now start measuring.

Digital load cells are also known as digital load sensors. Load Star Sensors offer a bigger flexibility, superior linearity and accuracy than the competitors and also and very important they offer professional technical guidance in providing custom solutions.

On the website you can choose from o wide range of digital load cells. For instance wireless load cells, hybrid load cells, low capacity load cells at the first view only. Also you can find numerous capacities and technologies. You can buy USB digital load cells,  analog load cells, resistive load cells digital interfaces, analog, resistive interfaces accessories load cell kits, load cell software. Each single category includes numerous products. The digital load cells and analog load cells are constructed from aluminum or stainless steel and are overload protected and low capacity.

Regarding the weight measurement kit, it combines four of the unique capacitive load cells with a wired USB Hub and Windows compatible software application. The main goal is to simplify the measurement and calibration tasks from a PC.

The Load cells combine the analog and digital outputs efficiently! By using an elementary hybrid adapter, anyone can read the digital output on a PC while measuring the analog output on a voltmeter or data acquisition system at the same time!

They also offer various products according to your load sensing needs. However, you may need certain features that the conventional sensors do not offer. They offer thorough services based on your needs at reasonable prices to help you get the product you are looking for. Delivery can take a few more days or maximum eight weeks. Customization can be a difficult process.

Load Star Sensors also sells a variety of PC friendly networking accessories and indicators in addition to the big database of digital load cells. The company develops load cells, interfaces, software, many accessories and the prices are unbeatable.

In case you decide to buy a load cell, you need to know that you can choose from numerous load cells. The online store includes: Digital Load Cells, Miniature Load Cells, Analog Load Cells, Wireless Load Cells, Load Cell Indicators, Load Cell Calibration, USB Load Cells. Interested in buying quality digital load cells? Load Star Sensors offers you a great opportunity and you can choose from many types of load cells.

Considering all those solutions, Load Star Sensors is clearly one of the best places online where you can learn more about load sensors, their usage and requirements and also more other useful information, and beside that you are able to buy quality products made in United States.

Article Source:http://www.articlesbase.com/hardware-articles/customized-load-sensors-available-for-sale-online-1513285.html

BEST CHEAP LAPTOP DEALS IN CHRISTMAS EVENT

Friday, November 27th, 2009 at 12:31 pm  
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We can probably help you find the used pc that's just right for you pricing today.

We provide used pc at affordable prices

If you are looking to buy a used pc for home or office use, don’t look further. We assure that you will get an affordable and discount pc here.

Personal computers in various forms are icons of the Information Age and are what most people think of as "a computer"; however, the most common form of computer in use today is the embedded computer. Embedded computers are small, simple devices that are used to control other devices for example, they may be found in machines ranging from fighter aircraft to industrial robots, digital cameras, and children's toys.

Programming languages provide various ways of specifying programs for computers to run. Unlike natural languages, programming languages are designed to permit no ambiguity and to be concise. They are purely written languages and are often difficult to read aloud. They are generally either translated into machine language by a compiler or an assembler before being run, or translated directly at run time by an interpreter. Sometimes programs are executed by a hybrid method of the two techniques. There are thousands of different programming languages some intended to be general purpose, others useful only for highly specialized applications

We can probably help you find the used pc that's just right for you pricing today.

We provide used pc at affordable prices

If you are looking to buy a used pc for home or office use, don’t look further. We assure that you will get an affordable and discount pc here.

Personal computers in various forms are icons of the Information Age and are what most people think of as "a computer"; however, the most common form of computer in use today is the embedded computer. Embedded computers are small, simple devices that are used to control other devices for example, they may be found in machines ranging from fighter aircraft to industrial robots, digital cameras, and children's toys.

Programming languages provide various ways of specifying programs for computers to run. Unlike natural languages, programming languages are designed to permit no ambiguity and to be concise. They are purely written languages and are often difficult to read aloud. They are generally either translated into machine language by a compiler or an assembler before being run, or translated directly at run time by an interpreter. Sometimes programs are executed by a hybrid method of the two techniques. There are thousands of different programming languages some intended to be general purpose, others useful only for highly specialized applications


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Article Source:http://www.articlesbase.com/hardware-articles/best-cheap-laptop-deals-in-christmas-event-1512011.html

Imation D20 Disc Publisher: An Innovative Technology Combination

Thursday, November 26th, 2009 at 6:57 pm  
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If you are part of the business where need to burn lots of CDs or DVDs and you want your finished discs to be noticeable in every aspect, you need the Imation D20 Disc Publisher. Leave a professional and long lasting impression with the D20 Disc Publisher from Imation. This easy to use CD/DVD publishing solution features a compact, professional design that fits anywhere you want with ease. The Imation D20 Disc Publisher has a 20 disc capacity and designed in a way that it automatically duplicates and prints full color direct-to-disc inkjet graphics on your discs. Not only does the Imation D20 Disc Publisher prints the disc labels, but it can also burn the disks for you automatically as well. When used with AquaGuard discs, the finished labels are resistant to water and humidity.

Imation D20 Disc Publisher comes with the disc burning speeds from the built in Pioneer burner of 16x DVD+/-R, DVD-R DL, 40x CDR. Labels are printed in 4800dpi resolution with 16.7 million colors and maximum print width is 4.724". Imation D20 Disc Publisher comes with printing and burning software that is Mac and Windows compatible. Connectivity is via USB 2.0.

Quick, fast and reliable Imation D20 Disc Publisher setup ensures you’ll be burning and printing discs in minutes with the included easy to use software. The D20 Disc Publisher combined with Imation AquaGuard discs, ink and image creation software ensures maximum design flexibility, brilliant colors from hub to edge is a guarantee, and quick drying graphics that resist smearing when exposed to water or humid conditions.

Core Features of Imation D20 Disc Publisher:
- Automatically burn and print up to 20 discs
- Pioneer® DVD/CD drive with recording speeds up to:

- 16x  DVD±R
- 8x   DVD-R DL
- 40x  CDR

- 4800dpi direct-to-disc printing
- Maximum print width of 4.724" (120mm)
- Print up to 16.7 million colors (Z-Color™ color profile included)
- DVD/CD burning and printing software for PC and Mac included
- Compact, professional design - 15in x 14.75in x 7in
- USB 2.0 interface

Minimum System & Software Requirements:

PC:

- Windows XP/2000
- Pentium® III 700MHz or higher processor
- 500MB RAM
- USB 2.0 port
- NTFS drive partition

Mac:

- OS X v10.2 or higher
- 700MHz PowerPC® G4 or higher or Intel® Solo or Duo Core™ processor
- 256MB RAM
- USB 2.0 port

Hey! Don’t you think that information shared in above lines about Imation D20 Disc Publisher is attractive enough to compel you to buy one?  So go ahead and order this amazing gadget as soon as possible.

After graduating in electronics seven years ago, Nathan decided to get into the field of electronics. His expertise and knowledge of the latest electronic goods have made him a trusted and reliable name among people as far as seeking expert opinion before buying products such as Imation D20 Disc Publisher and CDR and DVDR etc. is concerned.

Article Source:http://www.articlesbase.com/hardware-articles/imation-d20-disc-publisher-an-innovative-technology-combination-1508671.html

PC Laptop Computers – Apple Macbook Computers and Notebook

Thursday, June 4th, 2009 at 6:39 pm  
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Whether a buyer chooses to opt for a Mac or a PC laptop could very well merely depend on what product they are more familiar with.

You may find consumers extremely critical of one or the other based solely on their own experiences and it does not necessarily follow that the biggest critics have actually used both products, just that they are fiercely loyal to what their own preference is (logic does not come into it).

However advances in technology make the gap between Mac and PC draw closer together on a regular basis and it is possible to use similar programs and file formats for both camps.

  1. Cost, obviously plays a factor for most people and initially a pc comes way out on top, but, because PC’s do not come with many items of software as standard it brings the overall cost of either laptop much closer over the laptop’s expected lifetime. Can you afford to pay the higher cost of a Mac, and receive a laptop that is ready to  dive right in with whatever you have in mind or would you prefer to pay less upfront, but, add to and upgrade as and when your need or your purse strings   allow?

Apple Mac’s are less susceptible to virus attack than laptop PC’s because of their  OS X operating system, but anti-virus, and anti-spyware software is readily available and by following  simple safety precautions it is possible to avoid   major problems whilst using the Windows system on a laptop PC.

If you like gaming, you will find most computer games have been written for PC’s, and that would, obviously, make you more inclined to opt for this form of laptop, but, if your line of work is video editing, graphic designing or web developing then a Mac laptop handles graphics much better and offers software suites that outperform their PC competitors.

Many factors may determine which laptop a person opts for, whether that is previous experience, work related, recommendation, cost or a combination of many factors. This is no right or wrong answer when it comes to the laptop of your dreams.

How to Select Your Computer Printer Parts Vendor

Thursday, June 4th, 2009 at 6:04 pm  
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When you need service parts for your critical office printers, you want the right product, and you want it right away.  A printer parts vendor must be a trusted seller offering quality products at competitive prices.  Look for a vendor with inventory expertise, process knowledge, and outstanding customer service.

There are countless current printer parts available, but in addition, there are previous generations, withdrawn models, and new models coming onto the market all of the time.  A parts vendor must be an expert on the entire inventory available, as well as having an awareness of repair and maintenance schedules.  This allows them to communicate with you effectively.  Vendors should also offer a large in stock inventory in order to access products promptly, and deliver them quickly and within your budget.

When a vendor is an expert in the operations process, it translates into efficiency and reduced cost.  A dealer should use online technologies that allow for searches for products, real time ordering and tracking, web quotes, automated returns, and communications.  The right products are shipped without delay, as well as returns and communication handled quickly with experienced process experts.

It is imperative to use a printer parts vendor with excellent customer service.  A seller should be immediately responsive to calls, emails, live chat and instant messages, and help you find the right product solutions at a great price.  Service should be courteous, friendly, and professional.

Marketpoint.com is a leading national seller of printers, and printer parts and supplies for Lexmark, Hewlett Packard, and Dell printers.  They are experts in their field, and have outstanding customer service and competitive prices.

SAVE $220 – Acer Notebook Intel Pentium Dual-Core 1.73GHz $379

Thursday, June 4th, 2009 at 5:03 pm  
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SAVE $220 - Acer Aspire Notebook Intel Pentium Dual-Core 1.73GHz Wireless 2GB DDR2 120GB HDD 14.1" WXGA Vista Home Premium Refurbished $379.97

Source:SAVE $220 - Acer Notebook Intel Pentium Dual-Core 1.73GHz $379

SAVE $30 – Logitech Surround Sound System 180W $59

Thursday, June 4th, 2009 at 5:03 pm  
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SAVE $30 - Logitech Z Cinema Advanced USB Surround Sound System 180 Watt (2 Satellite Speakers and Subwoofer) $59.99

Source:SAVE $30 - Logitech Surround Sound System 180W $59

SAVE $40 – Intel Core2Duo E8200 2.66GHz $129

Thursday, June 4th, 2009 at 5:03 pm  
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SAVE $40 - Intel Core 2 Duo E8200 2.66GHz 6MB Cache 1333MHz FSB Retail Processor with Fan $129.99

Source:SAVE $40 - Intel Core2Duo E8200 2.66GHz $129

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