Custom LED Display
April 9, 2009 by admin
Filed under buy-smart-guides
Custom LED Display, as the name specifies, facilitate control anything with any message that you can think of, from hours of operation to daily specials. These are used by almost all industries like factory, banks, airports, universities, libraries, and many others.
Custom LED displays are based on LED technology which gives it a modern sleek and thus the improved performance. This innovative technology enables the production of affordable giant displays.
LED’s are solid-state devices with no moving parts and by producing little heat and being energy efficient, our current LED sign designs are at least five times more efficient than their incandescent counterparts.
These are designed to be lightweight and easily mountable. Moreover these are durable and reliable as they are made to be impact resistant. Custom Led displays can be designed according to the need of the user and considering all above aspects so that they can be maintained easily. Of course the maintenance helps improve the life of any electronic equipment, measures are taken into consideration while production, so that the cost of maintenance reduces at a great extent.
The customer can be provided with any specified LED colour and design package, with samples delivered, from initial approach, in less than four weeks, whether the product is rotary encoder for a state-of-the-art digital sound deck or a meter for a milling machine.
Custom LED displays are mounted on the wall or hanged from any ceiling for broadcasting information that sight from any distance. Moreover the brightness of these custom LED displays help sight from any distance very clearly.
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About The Author Paula Jones Jayex Technology Limited, based in London specialise in advanced information display systems. Established in 1978 we have pioneered the development of the LED display market and now have over 18,000 customers worldwide. We offer, probably the largest range of models from small single line signs to big screen Megavision screens that can display live video and action replay in stadia. Article Source: http://EzineArticles.com/?expert=Paula_Jones |
Rotary encoder
April 9, 2009 by admin
Filed under buy-smart-guides
A rotary encoder, also called a shaft encoder, is an electro-mechanical device used to convert the angular position of a shaft or axle to an analog or digital code, making it an angle transducer. These devices are used in industrial controls, robotics, in top-of-the-line photographic lenses, in computer input devices (such as optomechanical mice and trackballs), and in rotating radar platforms.
There are two main types: absolute and incremental (relative).
Absolute rotary encoder
The absolute digital type produces a unique digital code for each distinct angle of the shaft. They come in two basic types: optical and mechanical.
Mechanical Absolute Encoders
A metal disc containing a set of concentric rings of openings is affixed to an insulating disc, which is rigidly fixed to the shaft. A row of sliding contacts is fixed to a stationary object so that each contact wipes against the metal disc at a different distance from the shaft. As the disc rotates with the shaft, some of the contacts touch metal, while others fall in the gaps where the metal has been cut out. The metal sheet is connected to a source of electric current, and each contact is connected to a separate electrical sensor. The metal pattern is designed so that each possible position of the axle creates a unique binary code in which some of the contacts are connected to the current source (i.e. switched on) and others are not (i.e. switched off).
Optical Absolute Encoders
The optical encoder’s disc is made of glass with transparent and opaque areas. A light source and photo detector array reads the optical pattern that results from the disc’s position at any one time.
This code can be read by a controlling device, such as a microprocessor, to determine the angle of the shaft.
The absolute analog type produces a unique dual analog code that can be translated into an absolute angle of the shaft (by using a special algorithm).
Single-track absolute rotary encoder
If the manufacturer moves a contact to a different angular position (but at the same distance from the center shaft), then the corresponding “ring pattern” needs to be rotated the same angle to give the same output. If the most significant bit (the inner ring in Figure 1) is rotated enough, it exactly matches the next ring out. Since both rings are then identical, the inner ring can be omitted, and the sensor for that ring moved to the remaining, identical ring (but offset at that angle from the other sensor on that ring). Those two sensors on a single ring make a quadrature encoder.
For many years, Torsten Sillke and other mathematicians believed that it was impossible to encode position on a single track so that consecutive positions differed at only a single sensor, except for the two-sensor, one-track quadrature encoder. However, in 1996 Hiltgen, Paterson and Brandestini published a paper showing it was possible, with several examples.
Custom LED Display
March 9, 2009 by admin
Filed under What's Hot
Custom LED Display, as the name specifies, facilitate control anything with any message that you can think of, from hours of operation to daily specials. These are used by almost all industries like factory, banks, airports, universities, libraries, and many others.
Custom LED displays are based on LED technology which gives it a modern sleek and thus the improved performance. This innovative technology enables the production of affordable giant displays.
LED’s are solid-state devices with no moving parts and by producing little heat and being energy efficient, our current LED sign designs are at least five times more efficient than their incandescent counterparts.
These are designed to be lightweight and easily mountable. Moreover these are durable and reliable as they are made to be impact resistant. Custom Led displays can be designed according to the need of the user and considering all above aspects so that they can be maintained easily. Of course the maintenance helps improve the life of any electronic equipment, measures are taken into consideration while production, so that the cost of maintenance reduces at a great extent.
The customer can be provided with any specified LED colour and design package, with samples delivered, from initial approach, in less than four weeks, whether the product is rotary encoder for a state-of-the-art digital sound deck or a meter for a milling machine.
Custom LED displays are mounted on the wall or hanged from any ceiling for broadcasting information that sight from any distance. Moreover the brightness of these custom LED displays help sight from any distance very clearly.
|
About The Author Paula Jones Jayex Technology Limited, based in London specialise in advanced information display systems. Established in 1978 we have pioneered the development of the LED display market and now have over 18,000 customers worldwide. We offer, probably the largest range of models from small single line signs to big screen Megavision screens that can display live video and action replay in stadia. Article Source: http://EzineArticles.com/?expert=Paula_Jones |