DC Power Supplies

The difference of the two lies in the direction, wherein the former keeps the moving electrons in a switching manner, while the latter is in a steady single track. The AC system of the power supply is utilized for transmitting long distance power to various power companies. Therefore, high voltages are needed to fill the transformers of those companies. DC power supplies, on the other hand, provide current on a small-scale basis.

The direct way of supplying a current is typically found in the form of a battery or batteries, in which positive and negative terminals are moving in a single direction. DC power supplies are used in various mechanisms such as car audio equipment, DC-powered radios, mobile phones and a whole lot more. In the competitive market, there are all different kinds of DC power supplies in different wattages and voltages. The specifications of each DC power supply that … Read the rest

Wireless Cards


Wireless Internet access is one form of Broadband, high speed, Internet access that utilizes radio frequencies instead of phone or cable lines. Wireless cards in managed mode will join a network created by a master, and will automatically change their channel to match it. Wireless cards from many manufacturers are widely available. Wireless cards are also available for purchase through us at current industry prices. Wireless cards that are purchased by our customers through other retailers can also be used; however, compatibility is not guaranteed.


Cards with Marvell chipsets should be avoided at this time. For starters, a dual-band card takes up only one slot. Each card is supplied with a client that provides improved configuration options when compared with Windows XP’s default wireless setup. The real differentiators are the client utility’s features, as well as the range and throughput of the network card in each mode.


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Building a Basic Electronic Circuit

Digital devices are types of electronic systems that use digital signals. Its representation of Boolean algebra is commonly used in mobile phones, computers and other costumer products. Digital devices and other digital circuits are usually made from big assemblies of logic gates.

Analog devices are electronic systems with a constant variable signal. The earliest device invented was the analog. The major difference between digital and analog electronics is its noise, precision and design difficulties.

The process information is programmable in analog electronics. They are more vulnerable to noise as compared to digital electronics. In digital, as the information is programmed and as the signals stay long inside the range value, digital devices represent identical information similar to analog devices.

Digital electronics are much smaller and easier to design as compared to similar analog electronic processes. This is one of the major reasons why the latter is more common and preferred. … Read the rest

Electronic Systems Technology Degree Programs

Vocational colleges focus primarily on providing students with an overall understanding of the components that make up electronic systems. Many degree programs focus on this objective to prepare students for a wide range of entry-level careers and the opportunity to transition into further training. Students enter the field with a strong skill set that gives them an understanding in many areas, which may include:

  • The concepts of circuit design and the use of analysis when working with microprocessor, analog, and other electronic systems.
  • The procedures followed when troubleshooting malfunctions and how to correct them.
  • The construction and installment of an electronic system.

Training develops the knowledge needed to complete these types of tasks. Students have the chance to enter programs focused on electrical engineering, electronic repair, and more. Educational training may be similar in each area so students need to research available options before entering programs. To find the best … Read the rest

Laptop Battery Chargers

Laptop battery charger prices range from $200 to $300 and usually have a twelve-month warranty period. Ready access to chargers is important because nickel cadmium may suffer from a ‘memory defect.’ A laptop user may face this problem if the batteries are not fully discharged before recharging. A nickel cadmium battery should be charged only after it has been completely exhausted, otherwise the battery ‘thinks’ that it only has fifty percent of its original capacity and only uses half of its potential, thus increasing the time constraints of the laptop.

A user can recharge batteries for a laptop in two ways. First, whenever the PC is using AC power, a small flow of electricity runs to the battery that is called a trickle charge. This charge will automatically recharge the batteries after the laptop is disconnected. Another method of charging a battery is with an external battery charger. The batteries … Read the rest

Technology of Tapes

Legacy formats such as Digital Linear Tape (DLT) were a reasonable data storage AITernative in the past, but a combination of new business challenges and new technology choices are driving many companies to rethink their tape storage path. For example, conventional DLT systems are approaching the end of their useful life cycle, with no well-defined way to add capacity without upgrading to a new format. While Super DLT (SOLT) and Linear Tape Open (LTO) systems do have roadmaps to the future, neither format offers a compatible solution that can span the gamut of storage needs, from the entry or workstation level up to the “Super Drive” level. In addition, upgrades require a media change, making long-term use of linear solutions more cumbersome and less flexible.

Perhaps, as Frost suggests, it’s time to consider a different path. Advanced Intelligent Tape[TM] (AIT) data storage solutions from Sony provide a broader range of … Read the rest

ATX Power Supply

Some of the power supply designs were using the PWM IC (UC3842) and power FET, some use the double transistors while some use only a single power IC in the primary side. Because of the manufacturers wants the design to be made into compact size, many secondary or even primary power supply circuit were build into a modular board (smaller board). This made troubleshooting even more difficult because many times the meter’s probe can’t reach to the testing point.

The real reason why I had stopped repairing ATX power supply was the profit margin. If you charge to high the customers rather buy a new unit with one year warranty given. If you charge too low, you may end up in the losing side because of the components replaced, electricity and etc. If you charge reasonable, the profit margin gained can’t even cover your time spent on troubleshooting it. I’m … Read the rest

Barcode Scanner Work

Each barcode has specific symbols defined as a series of bars in a barcode. The way to differentiate the barcode is by the height and width as well as the bar spacing. Each strip of bar can represent a number, character or alphanumeric character depending on which type of barcode symbology set is used.

Usually a barcode contains a start and end bar to denote the starting and ending point of the barcode. Sometimes, there is an additional bar called the checksum bar. The purpose of the checksum bar is used to determine whether the barcode is correct after calculation and ensures the accuracy of the barcode.

The barcode scanner’s photosensors can then read the barcodes and convert them to electrical pulses. Since each strip of bar is equivalent to a character, the barcode software can easily convert these electrical pulses into readable text that can be displayed on a … Read the rest

Be aware of Adware

Here are some stuff you should sentinel out for in order to guarantee that your system is spyware free:

  • swift change of home page – Spyware is regularly intended to redirect your home page to the webspot of the inventor. This is done to accomplish different purposes:
  1. Advertisement -some companies make use of spyware in order to promote their trade. regularly, spyware is worn to change a abuser’s home page in order to host that abuser to the idea of the inventor’s trade. There are also webspots which profit a lot from every “hit” on their webspot. Spyware is regularly worn to make indeed that abusers do access their spot. By infecting a certain interact, they get a lot of people to trip their webspot. By screening the number of “hits” on their webspots, companies would be able to cheer investors and advertisers.
  2. meanness -some inventors of spyware just divert
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Chinese Electronic Items

In recent times Chinese electronic products industry has been dynamic in contributing in international trades as well. All china wholesale electronic goods feature good quality that is far better in comparison to other electronic products available in international market.

The recent studies of the technological capability of the China electronics industry also states that the China is likely to equal South Korea, Taiwan, and even Japan as a major Asian force in the world electronic consumer goods industry in twenty-first century. Besides this, amongst the E7 developing countries, China is ranked as the most eye-catching consumer electronics market from investment point of view. Moreover, its consumer electronics market has increased at a CAGR of 11.71% during 2002-2006 and is further anticipated boosting at a CAGR of 12% during the forecasted period (2007-2011).

The electronic items made in China products are exported in huge amount all over the world, especially in … Read the rest