An electrical capacitor is a type of electrical reservoir that stores and releases electric energy. This type of item is used in the production of many devices, such as amplifiers, computers, televisions, radios etc. You can find some of the components mentioned above in almost all electronic circuits.

 

Since they basically host an electric charge, their voltage and capacities can apply to a large variety of needs. Producers use a lot of materials to create capacitors according to the area of usage.

 

Ceramic

 

Usually, electrical capacitors are designed as sandwiches of insulators placed between 2 layers of metal. An insulator is made out of a material called “dielectric” and it determines the general behavior of the capacitor. The devices that have a ceramic dielectric have smaller values (they start at a couple of picofarads- the farad is the unit of capacitance) and can reach even a thousand picofarads. An interesting thing about them is that they have great capacitance stability when it comes to a large temperature range.

 

Tantalum

 

The items that need to fit a large capacitance value in a tiny space can easily use tantalum capacitors. They are polarized (one lead takes positive charges while the other one negative ones). Extra attention should be given in order not to wire the capacitor backwards or the polarity might destroy it. You can recognize a bad capacitor by the silvery fluid released.

 

Aluminum Electrolytic

 

This is used for the stronger applications and the power-supply filters. It is not very expensive and has a tolerance of 20%. This means that they normal value of the part can vary higher or lower than the value displayed on the label.

 

One of the most significant issues in this case is represented by the liquid inside, which can dry and prevent the capacitor from working. The liquid can also leak and destroy the rest of the components. Furthermore, the electrolytic capacitors can explode if they are connected in a wrong manner, they can leak current, do not have a long lifespan and do not resist to high temperatures.

 

Polyester Film

 

This type of electrical capacitors has a greater capacitance value and it is very reliable. Its capacitance increases when the temperature does, making it incompatible with sensitive circuits. These capacitors can be found in various locations and do not cost very much.

 

Silver Mica

 

This is also a great dielectric. Mica is a natural mineral which creates thin sheets. It has a very accurate part values, it is very reliable, but its price is a bit higher compared to other capacitors. It is used especially for the frequency-sensitive parts of the radio and audio circuits. In this case, the capacitance value starts at a couple of picofarads and goes up to very low microfarads.

 

Are you looking for a reliable provider of electrical capacitors? Yuhchang Electric Co., Ltd. would be the first choice of capacitor supplier for you.  With rich experienced and advanced technology, we insist to produce high quality electrical capacitor series to clients. Welcome to visit Yuhchang’s website to learn more information about our products. Feel free to contact with us for further details!

 

 

Article Source: http://EzineArticles.com/7959118

Today’s medical application solutions are getting smaller, not in the sense of importance, but in size. Emergency medical equipment is decreasing in size in order to become portable and usable in the field before a patient ever reaches a hospital. On the spot treatment methods can help stabilize trauma patients and save lives.

 

For the armed services, field medicine is of critical importance. Soldiers do not have the benefit of full hospitals when they are in a battle zone; typically, they only have access to what medical personnel can carry on their backs or in a truck. Miniaturization has enabled medics to utilize more advanced equipment outside of hospitals to stabilize wounded soldiers and save lives. One particular component that has offered new breakthrough is compact, high torque DC gear motors and DC micro motors.

 

Let’s take a look at how these devices are implemented and used in real situations.

 

Fluid Infusion Needs

 

The first line of treatment for trauma patients is controlled fluid infusion, but conventional units are not suitable for field use. Standard infusion pumps deliver about 100mL of liquid per hour, but a wounded soldier experiencing trauma needs liquids much faster at a rate such as 100ml per minute.

 

Technology Based Medical Application Solutions

 

The solution for field equipment to provide rapid fluid infusion for trauma patients and wounded soldiers has to be a compact, low weight, battery operated unit that runs silently and no electronic signature. The basis of the infusion pump is a DC micro motor. This battery operated, miniature high torque motor weighs in under a half of a pound and runs on six triple-A batteries for over 10 hours. These specifications are achieved through efficient operation.

 

The crux of the design is a unique cartridge set and disposable tube system. When one tube is being compressed, it stored potential energy. Once the tube is empty, that potential energy is recovered as the expansion of the empty tube boosts the action of rocking the yoke to the other side so that it can begin to compress the other tube. In this way, the function of using one infusion cartridge powers the second, doubling the overall flow with only a minimal increase in required power.

 

The Motor Solution

 

Of course, to deliver the infusion liquids in such a compact unit, a high torque motor is needed. To find the appropriate battery powered device, a DC micro motor is used to fit the bill. In only a 13mm DC micro motor with a 76:1 gearhead reduction ratio, the infusion pump is able to deliver a sustained 100mL per min or a quick 250mL single burst for critical situations.

 

The finished Power Infuser product is a base pump unit topped with a disposable cartridge. The unit weighs in less than 10 ounces and measures 5 inches by 4 inches by 2.3 inches. The infuser is able to meet a wide range of criteria and deliver high volume infusions in a compact battery operated unit. Thanks to miniaturized DC micro motors, soldiers on the field have one more tool to ensure that they get home safely.

 

Hsiang Neng DC Micro Motor Manufacturing Corporation was established in 1985, which is a professional manufacturer of precise DC motors and geared motors. Our main products include geared motors, planetary geared motors, mini motors, large-sized motors as well as motors for treadmills, actuators and etc. If you need more information about DC micro motor and other motors, welcome to visit Hsiang Neng’s website and feel free to contact with us.

 

 

Article Source: http://EzineArticles.com/3522228

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Biometric Access Control is the new age technology that has revolutionized attendance and access systems like never before. The age of swapping cards and proxy punching is long gone and now all organizations are adopting this new technology which uses various human traits such as fingerprint scanning, retina scanning and facial recognitions in place of swapping cards and passwords. The benefit of these human traits is that they are unique to every individual and cannot be duplicated or stolen.

 

Every year organizations lose a huge sum of money due to time thefts and unnecessary manual work of calculating wages and working days of each and every employee. This is not only tiresome and time consuming but also costs a lot of money. No organization can afford such costs in this highly competitive world. So many organizations are now switching to biometric scanning processes which enable them to save money and also time.

 

Biometric technology has various modes of connectivity and access depending on the needs and want of any organization. Manufacturers of these scanners keep the needs of the customers in mind and provide them with customized technologies most compatible with their employees and their requirements. The different modes include fingerprint scanning, which include the scanning of fingerprints of every employee while entering or leaving the office. Retina scanning is the process by which the iris, retina and other features of the human eye are scanned and then admission is allowed to any individual inside any high secure facility. Retina scanners are really very accurate and personalized. Many high risk government and private facilities use a combination of fingerprint scanning and retina scanning in order to provide maximum security and to ensure that only authorized personnel are allowed to enter. Facial recognition includes scanning the vital points of any individuals’ face that differentiate it from any other individual.

 

Thus latest biometric technology is the technology of the next age and many organizations have already started using it. Preliminary results have been very promising and many are inclined to follow the trend in near future. Its products are very reliable. These biometric systems are now available easily and you can access them as per your convenience and requirements. So don’t be late and order a biometric scanner as per your requirements as soon as possible. It’s high time to upgrade yourself if you don’t want to lag behind in this competitive world.

 

Quality biometric access control system manufacturer – Pongee, providing fingerprint time attendance, face recognition access controller and USB fingerprint scanner in this series. Our biometric access controllers with time recorders are high security, easy to start and easy to use. Welcome to browse the specification about our biometric access control systems and feel free to contact with Pongee for more details!

 

 

Article Source: http://EzineArticles.com/9011041

 

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What is Super Bright LED Light?

On March 1, 2017, in LED, by Lambert

If you are planning to buy a quality LED flashlight, you should make sure that it would be able to provide good and clear lighting. There are many flashlight manufacturers in the market, who are providing super bright LED lights, which can be used in dark areas. These LED are capable of lighting up to 300 meters. This is a marvelous discovery of the new and advanced technology. Even though LED was in the market from many years, most of the people did not know the real benefits of it. As people started using it for different purposes, LED manufacturers started producing more advanced and powerful LED lights.

 

However, installing LED to cars has become a new trend today. Most of the people who look for an option to modify their cars and other vehicles use LED bulbs. Even though most of the people use the ordinary LED bulbs, few opt for super bright LED light, which will provide them more power beams than the ordinary ones. These LED come out with four output levels; therefore, you have an option to set it to low, medium, high or with turbo.

 

If you research on the web or visit your nearby store, you will be able to find different types of super bright LED light series, which are obtainable in different colors. Apart from the car modification, LED is also used for many industrial purposes. These bulbs can be also fixed for bikes with the help of a LED kit. Finding the right accessories for your vehicle is very important as it might enhance your driving experience.

 

DAINA is the professional LED manufacturer in Taiwan. We provide a variety of high quality LED lights such as super bright LED lights, oval LED, rectangular LED, multi-color LED and so on products for customers. Learn more information about LED lights, welcome to visit our website and feel free to contact DAINA.

 

 

Article Source: http://EzineArticles.com/3710498

What are Solenoid Valves?

A solenoid valve is an electro-mechanical valve that is used to control the flow of liquid or gas. The solenoid starts by converting an electrical signal into a mechanical movement. The signal is then sent to a coil and the movement then occurs inside of the valve. Solenoid valves are usually be described as pilot operated or direct operated/acting.

 

Pilot Operated Solenoid Valves

2 way pilot operated solenoid valves have two chambers separated by a diaphragm. The upper chamber is connected to upstream through a pilot hole in either the cover or diaphragm. The media exerts a pressure that acts on the upper side of the diaphragm and keeps the valve closed. When the coil is charged the core lifts off the orifice seat allowing the operating chamber to de-pressurize. The thrust of the upstream pressure under the diaphragm continues, lifting the diaphragm and opening the valve.

 

Pilot operated solenoid valves only operate with a suitable upstream pressure differential and do not operate at zero pressure. Also a minimum pressure differential across the valve is required to keep them open or closed. Pilot operated solenoid valves can provide high flow rates at high pressures with lower power consumption.

 

Direct Acting Solenoid Valves

Direct acting solenoid valves do not use a diaphragm, their seal is part of the moving core. Two way NC direct acting solenoid valves have a spring that holds the core against the seal. When the coil is charged the spring is overcome and the seal is lifted from the orifice seat thus opening the valve and allowing the media to pass through the valve.

 

Two way NO direct acting solenoid valves have a fixed core which usually in the bottom section of the armature tube. The armature is located in the upper part of the valve. A stem passes through the fixed core and is coupled to the seal. This is held off the seal by means of a spring and makes a seal when the coil is energized, thus closing the valve.

 

Three way direct acting solenoid valves work in almost the same way as a two way direct acting solenoid valve. The fixed core has an exhaust orifice running through it. The plunger has an upper seal and lower seal allowing flow to or from either the body seat or exhaust.

 

Direct acting solenoid valves are used when there is no line pressure applied. Typical applications would include a cleaning line when a pump supplies bursts of water through the line. A direct operated solenoid valve would remain closed, even when no pressure is being applied (i.e. in between the busts of water). This is in contrast to a pilot operated valve, which requires some pressure for the valve to stay closed.

 

Excellent Solenoid Valve Manufacturer in Taiwan

SHAKO is one of leading and the largest professional pneumatic solenoid valve manufacturers in Taiwan. With rich experiences and in-deep knowledge, we are able to provide pneumatic solenoid valve products with excellent high quality & rapid service for various industries. If you need more information about solenoid valve series, welcome to visit the website of SHAKO.

 

 

Article Source: http://www.bmengineering.co.uk/news/solenoid-valves/How-do-pilot-operated-and-direct-operated-solenoid-valves-work

 

The best display technologies of only 10 years ago are considered primitive by today’s standards. They were a poor return on investment because they were expensive and added little to the control room’s comparative ability to manage critical information. Expensive large format front and rear projectors were the primary choice. They were undependable, relatively low resolution, and required expensive maintenance contracts because they rarely had redundancy when a projection lamp failed. Then you add expensive, bulky hard-wire switchers to bring signals to the projectors and you still don’t have the capabilities of today’s most basic LCD video wall driven by a computerized controller. In fact, much of what was considered state of the art at the time was just “eye candy”; it looked good, but did little to advance the performance of the people using it.

 

What is considered a modern video wall system?

It employs a matrix of displays driven by a sophisticated computer that allows the operator to acquire and display more information faster than with older methods. This also means faster and better decision making. These are the type display systems that do much more than merely connect a switch between computers and individual displays mounted to the wall. These systems allow you to reach out on the data network and bring in an almost unlimited number of sources to the video wall, and as the network grows, it is unaffected except to say that more screen surface could be needed to display more information than before.

 

The growing popularity of LCD video wall systems

These are now more popular because they meet most performance requirements, require less investment and occupy the least amount of floor space. In fact they can be mounted on the wall taking up only 4-6″ in depth. These high resolution displays form a matrix or single pallet. Each display’s ultra-thin bezel is designed to minimize distraction when enlarging images across multiple displays.

 

These are relatively easy to install and require little maintenance or adjustment. They are rarely repaired because it’s easier and faster to replace than repair, however the typical industrial LCD display will run dependably for thousands of hours.

 

I should point out that these systems perform the same as video walls with other type displays because it’s the video wall controller, or brain of the system that acquires and displays what is shown on the video wall. The video controller (processor) doesn’t see the number of displays, or the type or size of displays. The controller sees the matrix of displays as a single display allowing the images to be easily placed and sized anywhere on the overall screen surface.

 

There are two types of LCD video wall used in control rooms; wall mounted or freestanding cabinet. Wall mounted systems require that the wall be reinforced and cannot be installed or easily relocated like a 12″ deep cabinet. The cabinet is modular and stores all supporting electronics in the base and as a result, can be easily expanded and relocated as requirements change.

 

For more information on this, please ask advice from an experienced LCD video wall solution provider like EAGO Vision, the company specializes in customizing LCDs monitors and troubleshooting electronic devices related issues. Welcome to visit the website of EAGO and feel free to contact with us.

 

 

Article Source: http://EzineArticles.com/8416914

 

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WiFi Antenna: Things to Consider When Buying One

On January 6, 2017, in Antenna, by Lambert

The advancement in technology has enabled us to use a variety of gadgets, such as smartphones. Since these gadgets communicate wirelessly, the use of wireless antennas is on the rise. Whether at home or office, people find it more convenient to use devices that use WiFi antenna to communicate with each other.

 

WiFi antennas are better than traditional dipole antennas in more ways than one. The thing is that wireless antennas are capable of sending and receiving RF signals. Moreover, wireless networks work when radio transmission is sent through specific frequencies. Listening devices receive the transmitted signals. Some good examples of wireless devices are smartphones, laptops, and routers. These devices feature built-in radio signal receivers and senders. The antennas receive incoming RF signals radiating outgoing signals simultaneously.

 

Antennas found in routers can be mounted externally. However, other types of antennas are installed within the electronic devices. If you want to buy a WiFi antenna, you may want to keep a few things in mind.

 

Aesthetics

 

You can find these antennas in many different designs. Based on the design of your room, you can opt for an antenna of a specific design. The one you pick should suit your office or room.

 

Functionality

 

Different wireless antennas have different features. There are wide-band or multi-band designs. A more powerful antenna will be needed should you want a large area covered.

 

Omni-Directional

 

These powerful antennas can receive signals at 360 degrees. Typically, you can find these antennas in cell phones and WiFi routers.

 

Dipole or Directional

 

As the name implies, these antennas transmit signals in the direction they are pointed to. They have long range and can be an ideal choice if you live in an area that is far away from the place where you want to receive the signals from.

 

Yagi Antennas

 

For signal coverage from far away areas, we suggest that you go for yagi antennas. Let’s suppose you want to have WiFi available outside your house. One good option will be to install a yagi directional antenna.

 

These antennas work well for urban residents residing in quarters as they can save a lot of money. Rather than install multiple other antennas, a couple yagi antennas can do the job.

 

Cantenna

 

It’s a popular brand and refers to a do-it-yourself regular or directional antenna. You can use Cantenna antennas both indoors and outdoors.

 

Now is the time to upgrade your wireless antennas should you experience signal reception problem in your house. After analyzing the site, you may want to install a few more WiFi access points.

 

As soon as you have upgraded your WiFi antennas, you will notice that your device is working more efficiently. However, it is important to keep in mind that the role of antennas is to help with the concentration of signal. For a significant performance improvement, the radio transmitter has to be as powerful as possible. By keeping all these factors in mind, you can easily opt for the right WiFi antennas to meet your needs.

 

Founded in 1996, Cirocomm is a leading provider and designer in microwave communication components industry. We provide a large scale of passive 3C components, including dielectric resonators, dielectric filter and wifi antenna etc products. If you need more information about our wifi antennas or other antennas series, welcome to visit the website of Cirocomm to learn further details.

 

 

Article Source: http://EzineArticles.com/expert/Jovia_D’Souza/2007086

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Guiding Public to Safety with LED Warning Lights

On November 17, 2016, in LED, by Lambert

Having multifunctional warning lights can really make a difference to security personnel trying to control the situation and for public near the emergency zones. Emergency lighting can help the security personnel in many ways to direct the public, keep themselves safe and work on the emergency situation. The use of LED bulbs has made it possible for the LED warning lights to last longer without having the risk of burning out, or draining the batteries. They are also available in a number of colors, which works well in communicating the emergency situation to public.

 

The most common combination of LED warning lights that we see every day is the blue and red on cop cars. Apart from these colors, there are green, yellow, white and amber colors that are used in emergency vehicles like fire trucks, ambulances, construction vehicles and towing trucks. Emergency vehicles are not the only ones that have the need for warning lights. The personal vehicles that belong to emergency response team volunteers also need to be equipped with emergency lighting when they are responding to emergency situations. They are not allowed to have permanent fixtures of warning lights on their cars, but they can carry the lights and fix them when they have to navigate through heavy traffic zones, to the emergency zones. Green lights are used to request the right of way when navigating through heavy traffic zones, while red and other colors demand the right of way and are used by high-profile emergency vehicles.

 

Warning lights have strict regulations regarding the use of them in public because LED lights emit high intensity light beams which can have adverse effective on people with sensitive vision. Use of certain colors too varies from country to country and state to state in USA. Having LED warning light that can be stored is a great idea, since it gives the freedom to the security personnel to use depending upon the need of the hour. More sophisticated options like full-sized light bars are also of great use when it comes to dealing with the heavy traffic in emergency areas. Light bars come with in-built traffic advisers, which can have different shapes like arrows in discernible flashing patterns. They can direct the traffic in definite diversions that can suit the emergency situation, and help the emergency response teams to work better without confusion. Light bars need to be permanently fixed onto the roofs of the vehicles, but they are suitable for unmarked vehicles as well. Unmarked vehicles can have them mounted on the grill which is hidden under the roof of the vehicle. When in need grill rises to the surface and emergency lights can be used.

 

LED warning lights are available in the form of dash lights and deck lights as well. Dash lights can be mounted on the rear and front of the vehicles, which increases the visibility in the emergency zone. Dash lights and deck lights can also be used as hand-held lights when the security personnel need to survey the emergency zone on foot. They are worthy additions to every emergency vehicle, to help them be safe in roads and to guide the public to safety.

 

Ching Mars Corp. is a professional manufacturer and supplier in LED warning light from Taiwan. Nowadays, LED lights are becoming popular for several applications. We focused on manufacturing all kinds of LED warning lights to be placed on the outside of the vehicles.

 

Various LED warning lights of Ching Mars equipped for emergency situations, such as amber strobe warning light, LED warning light bar, LED traffic baton and more. If you are interested in need further details about LED warning light series, welcome to visit our website and feel free to contact Ching Mars!

 

 

Article Source: http://EzineArticles.com/expert/Sunil_Punjabi/235171

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Let’s face it: today’s technology is miles ahead of the technology from even ten years ago, and it’s improving at an exponential rate. Standard definition is hardly standard anymore; now 1080p high definition is the norm for most types of screens. And the new high definition – 4K Ultra HD – is a full four times sharper than regular HD!

 

With flatter, thinner screens that support ever higher resolutions, it’s clear that our hardware has surpassed our expectations and given us the possibility for the absolute top-of-the-line screen quality when it comes to audio/visual solutions. So what’s left? Where do we go from here, and how can we possibly improve upon what we already have?

 

The answer, which many overlook, is content. Sure, we may have the means to display amazing images and videos on super-sharp screens, but we also need the right content to actually put on those screens, and an easy way of doing so.

 

That’s why video wall software has become just as important as the actual hardware. Video wall installations are ideal for a wide variety of environments, from retail to education to entertainment, but often the content management systems can be complicated and time-consuming.

 

With the right video wall software, you should be able to manage your content with ease. That’s the next step in technological innovation: not just improving the hardware, but improving the ways that we add and manage content. We’re moving towards a world where content is king, and management that is both intuitive and user friendly is the name of the game.

 

Software also adds a level of customization that allows you to really make the content reflective of your identity or brand. Customization is increasingly important in today’s world where we are constantly inundated with information that can seem generic. With software that lets you customize your content, you can create something that is completely unique to you and your company. This is perfect for when you want to stand out in advertising or create dynamic presentations to showcase your business.

 

The right video wall software allows users to program and schedule content so that it will play at specific times-perfect for planning ahead. There are usually plenty of configurations available as well, like picture in picture. Software is also useful when you want to use a combination of different media sources, such as CD/DVD players, cameras, the internet, and more.

 

The future of AV technology is content management, so instead of just thinking about the right hardware, consider also a system that comes with integrated and intuitive software.

 

Eagovision is an excellent and professional video wall solution and software provider in the industry. Our Pro Video Wall Solution is a “Digital Signage Software” with complete Hardware that allows users to create unique Video Walls and amazing effects for their own Video Wall Displays.

 

Welcome to visit our website to gain more insight what our video wall software can do. If you have question or need technical support, please feel free to contact EAGOVISION.

 

 

Article Source: http://EzineArticles.com/expert/Jake_K/2157293

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What Is a Pneumatic Solenoid Valve?

On November 3, 2016, in Solenoid, by Lambert

A pneumatic solenoid valve is a type of standard electro-mechanical solenoid that, when activated by electrical power, opens a valve under positive or negative air pressure. In standard industrial applications, they have been used for many years as a type of on/off switch for pneumatically powered systems such as with air-powered drills. They have also been commonly employed in fluid control systems such as for releasing hot and cold water into a washing tub in an automatic washing machine, or for outdoor lawn sprinkler systems.

 

The pneumatic solenoid valve differs from the traditional solenoid in that the actuator controls a valve that is under some level of pressure. It can either function to release pressure and allow gas or liquid to flow when electrical current is applied, or the pressure itself can activate the valve in reverse and create an electrical signal that is channeled to a monitoring station.

 

Some pneumatic valve assemblies are also small control units that act as triggers for larger solenoids, and together these types of pneumatic solenoid valve designs are often referred to as a pilot valve or as a compressed air pilot valve. Pilot valves can be stackable, meaning that they can be arrayed in series on a pipeline or other fluid or gas flow assembly so that pressure and flow can be channeled at key points in an industrial process. A single pneumatic solenoid valve that is installed as a pilot valve also often has a manual level of actuator control. This means that the solenoid function of the unit, where the actuator opens and closes the valve, can be controlled manually by pushing a button or moving a mechanical arm. In more sophisticated industrial systems, however, the pilot valve unit is electrically controlled through a series of programmable settings for running power to the solenoid when needed to open or close the valve.

 

In automated industrial systems where large amounts of inaccessible pipeline exist that must be controlled remotely, pneumatic solenoid valve systems are often chosen, as they can be operated by ambient pressure that builds up in the system itself and they don’t require external power. This allows them to act as a type of safety valve to release pressure when needed, and, in the process, the mechanical motion of the pressure release can activate the electro-mechanical feature of the solenoid so that a brief electrical signal is transmitted to a control station to indicate that the valve state has changed. They also serve a reverse function where they can be opened or closed from the control station if an operator determines that a system is not performing properly.

 

Solenoid valve parts can range from very small units for rapid, micro-control systems, where they have a 0.4-inch (10-millimeter) diameter and can be run on low-level direct current (DC) voltages of 12 volts. High-power industrial level valves at the opposite end of the spectrum are made of strengthened steel alloys. They can handle pressures of up to 4,500 pounds per square inch (316 kilograms per centimeter squared) and temperatures as high as 1,200° Fahrenheit (649° Celsius).

 

SHAKO is leading and the largest professional pneumatic solenoid valve manufacturer. Our solenoid valves are available in 6VDC, 12VDC, 24VDC and 110/220VAC. If you need more details about solenoid valve series, welcome to visit our website and feel free to contact us!

 

Article Source: http://www.wisegeek.com/what-is-a-pneumatic-solenoid-valve.htm