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Whenever the word microprocessor is mentioned, it conjures up a picture of a desktop or laptop PC running an application such as a word processor or a spreadsheet. While this is a standard application for microprocessors, it is not the only one and the fact is most people use them indirectly in common objects and consumer electronics without realising it. Without the microprocessor, these products would not be as sophisticated or cheap as they are today. The embedding of computers into equipment and portable devices started before the appearance of the PC and consumes the majority of microprocessors that are made today. In this way, embedded microprocessors are more deeply ingrained into everyday life than any other electronic circuit that is made. A large car may have over 50 microcontrollers controlling functions such as the engine through engine management systems, brakes with electronic anti-lock brakes, transmission with traction control and electronically controlled gearboxes, safety with airbag systems, electric windows, air-conditioning and so on. With a well-equipped car, nearly every aspect has some form of electronic control associated with it and thus a need for a microprocessor within an embedded system.
A washing machine may have a simple microcontroller that contains the different washing programs, provides the power control for the various motors and pumps and even controls the display that tells you how the wash cycles are proceeding. Mobile phones contain more processing power than a desktop processor of a few years ago. Many gadgets contain microprocessors and there are even kitchen appliances such as bread machines that use microcontroller-based control systems. The word control is very apt for embedded systems because in virtually every embedded system application, the goal is to control an aspect of a physical system such as temperature, motion, and so on using a variety of inputs. With the recent advent of the digital age replacing many of the analogue technologies in the consumer world, the dominance of the embedded system is ever greater. Each digital consumer device such as a digital camera, DVD or MP3 player all depend on an embedded system to realise the system. As a result, the skills behind embedded systems design are as diverse as the systems that have been built although they share a common heritage.
There are many definitions for this but the best way to define it is to describe it in terms of what it is not and with examples of how it is used.
An embedded system is a microprocessor-based system that is built to control a function or range of functions and is not designed to be programmed by the end user in the same way that a PC is. Yes, a user can make choices concerning functionality but cannot change the functionality of the system by adding/replacing software. With a PC, this is exactly what a user can do: one minute the PC is a word processor and the next it’s a games machine simply by changing the software. An embedded system is designed to perform one particular task albeit with choices and different options. The last point is important because it differentiates itself from the world of the PC where the end user does reprogram it whenever a different software package is bought and run. However, PCs have provided an easily accessible source of hardware and software for embedded systems and it should be no surprise that they form the basis of many embedded systems. To reflect this, there are many free microcontroller projects to build a simple hobby gadget or a sophisticated data logging system for a race car.
If this need to control the physical world is so great, what is so special about embedded systems that has led to the widespread use of microprocessors? There are several major reasons and these have accumulated over the years as the technology has progressed and developed.
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Tags: Embedded System
Posted in Hardware · August 21st, 2010 · Comments (0)
For a lot of businesses, owning the right equipment is an important component of being a profitable company. This is especially true these days when technology moves forward at such fast pace. Unfortunately, all kinds of equipment are capable of breaking down. When this happens at an essential moment, the result can be extremely disastrous for a business. Printers, for example, are one type of product that is especially common in the business sector. These pieces of technology are used in many offices to print off texts like reports, memos, letters, charts, graphs, and lots of other texts.Even though the rise of electronic documents has reduced the requirement for printing, traditional printers are still extremely crucial, and many times it is smarter to fix them or purchase a refurbished model instead of than purchasing a new one.
Because many companies operate under a limited budget, it is not always realistic to purchase new equipment to replace items that break. Thus, it is crucial to get broken printers working again in a timely fashion. This means that selecting an accomplished printer repair company is necessary. There are a few factors that one should look for when selecting this type of business. Possessing extensive experience in the area is obviously a big concern and therefore should be considered. Nevertheless, it is not the only aspect. An excellent printer repair business will look into your business’s requirements and assess what programs will function best for you. Additionally, they can outfit you up with a yearly maintenance design to help cut down your overall repair costs. This is especially helpful for those companies that employ many printers. Lastly, a good Cincinnati printer repair company will visit your business to adjust the equipment that is not functioning.
Even though getting printers repaired is a good substitute to shelling out a good deal of money on a new model, it is not the only choice available. Often times buying a Used Zebra Printers is a more cost effective option. Although rapid advances in technology constantly make new products available, these new items are not always necessary to stay competitive. A qualified carrier of refurbished printers can frequently provide you a large selection of laser scanners, barcode label printers, laser printers, and other related apparatus. Choosing a company with a big stock list is advantageous because there is a greater chance that they will carry the right model you need. An additional aspect to consider is whether your supplier will help configure the refurbished printer to meet the requirements of your business. Finding a company that can manage this job can be especially crucial for those that are not very familiar with technology.
When all is said and done, it is essential for any business to make sure their printers are in good working order. The best way to accomplish this goal is to locate a printer repair business that also sells refurbished models.
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Tags: printers
Posted in Hardware · June 16th, 2010 · Comments (0)