B2B Electronics

Choosing the best multiband antenna for your purposes is a process that involves comparing what features you need with what cost you can afford. You will also need to determine how large of an antenna you will need to accomplish your desired aim or goal for the antenna. Ham radio or amateur radio enthusiasts often require a multiband antenna, and each of these individuals has different requirements as far as the cost, functionality, and size of the antenna, so there is not necessarily one best antenna for everyone.

Size is a key factor when selecting among multiband antennas. First, you will have to determine whether or not you have a place to store or mount the antenna you are selecting. You may also wish research any local building codes that would prohibit your antenna installation based on height, size, or other factors; some municipalities or homeowners associations place restrictions on sizes of external antennas such as these.

The size of the antenna that you choose will directly impact your ability to broadcast and receive signals from various distances, with larger antennas obviously providing a better range. You will need to balance the available space that you have with your requirements for transmitting and receiving power. Installation and mounting are also a factor in determining size, as larger antennas can be more difficult to install.

Cost is also a factor in determining the best multiband antenna for your purposes. A larger, more powerful, more versatile multiband antenna will generally cost more than one that is smaller, less powerful, or less able to handle a variety of different frequencies or functions. Set your budget by determining what you can afford to spend on a multiband antenna and what your level of commitment to the radio hobby is before making your purchase; once your budget is set, you can search for antennas within your cost range that are of the appropriate size.

You will also need to determine what specific functionality you need in a multiband antenna. For example, if you live in a highly populated area, background interference, or “noise,” can be an issue. In an area with high amounts of background noise, you will need an antenna that is powerful enough to transmit despite this. You’ll also want to make sure to choose one that has the proper filtering to remove some of this background noise so you can get a strong signal when receiving transmissions.

Evercom Communication Technology Co., Ltd. is the manufacturer of specializing in mobile antenna and wifi antenna etc. Multiband antenna is also one of excellent products provided by Evercom. If you are interested in learning more information and specification about their antennas, please feel free to contact with them.

Article Source: http://www.wisegeek.com/how-do-i-choose-the-best-multiband-antenna.htm

Power adaptors are devices that make it possible to connect different power sources to a variety of devices. In some cases, a power adaptor can make it possible to use an electrical device like a laptop computer in a foreign country, with no adverse effects to the device itself. Depending on the purpose and function, power adaptors can be relatively inexpensive or quite costly.

One of the most common types of power adaptor is the laptop adapter. Models designed for use by international travelers make it possible for a businessperson from the United States to use his or her laptop computer while on a trip to Europe or the United Kingdom. Some solutions are actually adapter sets that not only provide a selection of prongs for use with different types of outlets, but also transformers that help to convert alternating current to direct current. These kits can help trim travel expenses considerably, since there is no need to pay for expensive conversions during the stay, or to rent equipment for the duration of the trip.

There are other examples of the external power adaptor that are used with different types of electrical equipment. Cell phones and handheld devices often come with a simple power adaptor that make it possible to draw energy from a car battery by plugging one end of the adapter into the vehicle’s cigarette lighter. There are also adapter models that can be connected to small appliances and allow them to make use of electrical current stored in external batteries. Some designs are configured to allow the standard power cord to plug into the adapter on one end, and attach the opposite end of the adapter to an alternative power source, making the adapter an ideal solution during a power outage.

Depending on the particular scope of function, a power adaptor may be somewhat expensive. Devices designed to work with a wide variety of electrical equipment, especially those designed to help convert current, are usually the most expensive. Simpler devices, such as those that make it possible to use and charge a cell phone while in a moving vehicle, are usually available at very little cost. With all types of the adapter, it is important to make sure the products are thoroughly tested and meet minimum safety standards. This is especially important when the adapter is intended for use with expensive equipment, like a laptop, or will be used during a trip abroad.

As a leading and trustworthy power adaptor manufacturer and supplier, Hon-Kwang provides series AC/AC Power Adaptors and AC/DC Adaptors with different output rating, I/P voltage. For more details of Hon-Kwang power adaptors, welcome to check out our website to find power adaptors you need.

Article Source: http://www.wisegeek.com/what-is-a-power-adapter.htm

Motors play an important part in lifting and running a device. They are limited to weight but high efficiency and power capacity motors can easily cover heavy weight situations. Brushless Motors are best used for quadcopters, multicopters and drones.

Choosing motors for copter projects is not an easy task, so for every selection technical specifications such as thrust, power and RPM is to be checked.

Generally, planning to prepare your own project for the first time, weight is to be considered then the thrust to lift the quadcopter. The thrust should be kept higher for proper lifting, flying and landing. According to general statistics, thrust should be kept twice the weight of the quadcopter.

Trust is kept perfect, too low might create difficulties to take off and too high become hard to control.

A light weight copter is more efficient and durable.

Additionally, the battery is also considered an important element for long life of quadcopter. Lithium polymer batteries are best suited for long run as they do not swell nor they heat up faster. Batteries should be charged when it reaches a minimum of 20 percent. Zero percent might lower the durability of the battery. Brushless DC motors accomplished high speed of 10000 RPM or above.

Brushless DC motor architecture sounds very simple and compact. A fixed armature is present in the brushless motor around which permanent magnets rotate. Brushless DC motors are best suited as they produce high torque to weight ratio, increased reliability, more torque per watt, reduced noise, no brush required, as long life, totally eliminates ionizing sparks from the commutator plus reduce electromagnetic interference. Brushless motor commutation is easily implemented using a microcontroller, analogue hardware or digital firmware by using an FPGA. Brushless commutation has greater flexibility, speed limiting, holding torque when stationary, micro stepped operation for slow or fine motion control.

Brushless motors cover a wide range of applications in the field of electronic devices which comprise of computer hard drives, DVD/CD players, refrigeration. They are also favorable to electric vehicles such as bicycle and hybrid vehicles. Users or learners can use brushless DC motor in various quadcopter, multicopter or drones adding additional accessories for a specific function. Copters help in remodeling, transferring load, surveillance, Videography and many more.

After improving its performance, again, both the coils are energized and further improved in a manner such that it pushes the rotor and energize the coils. Therefore, it results in increasing torque and power from the motor. This great achievement is seen in this motor and takes time for other type of motors to grab.

Rebeck Enterprise is the manufacturer of brushless DC motors. Our brushless DC motor, high efficiency can be applied to mechanical precision positioning. And the motor features long life time, high efficiency, low noise, low consumption, variable speed, and many more. Welcome to visit our website to learn further details about brushless DC motor, and feel free to send inquiry to Rebeck!

Article Source: http://EzineArticles.com/9220583

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

The importance of clean and potable water can’t be undermined in any way. We all know the importance of water and how essential it is for our survival. The fact that our earth comprises of 70% water is not enough to quench our thirsts as another fact that only a little portion of this huge percentage is actually fit for consumption. Availability of clean drinking water has become a luxury that not all of us are available to enjoy.

The conventional source of drinking water has been tap water. But tap water comes with a lot of risks and health hazards as it contains impurities like phosphates, nitrates and heavy metals. The problem that lies in front of us is: how to quench our thirsts? Technology has gifted us with a lot of inventions that have made our lives much easier and simpler. Another gift of technology is RO water purifier.

Water purified from RO water purifier is relatively pure and also odorless and colorless. Reverse osmosis water purifier gives you water that is free if dissolved minerals. Equipped with the special property of being able to actively absorb toxic substances from water and eliminate them, Reverse osmosis water purifier gives you water which is clean and pure and absolutely fit for drinking.

Fluoride, a harmful chemical that is also responsible for yellowing of teeth is present in considerable quantities in tap water but water purified from RO water purifier is free of this chemical. The process of reverse osmosis removes hardness from water giving soft water which is apt for consumption. Reverse osmosis water is also free from sulfates, arsenic, aluminum, radioactivity, salts, detergents, bacteria and most viruses.

We recognize the advantage of reverse osmosis and thereby fully equip this technology in our water purifiers. We understand the importance of pure drinking water in the present day scenario where the quality of water is deteriorating each day and we often have to compromise on the quality of water. Triwin RO water purifiers provide you clean drinking water that is absolutely fit for consumption.

Established in 1984, Triwin accumulated years of experience in manufacturing products, such as water purifier and other water treatment equipment. We always fulfill the needs for top quality products and equipment in the water treatment industry worldwide. Learn further information about RO water purifier series, please do not hesitate to contact with Triwin directly!

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In electronics, polarity determines how a component should be inserted into a circuit. A non-polarized component can be connected in any direction and will still function properly. A polarized component can only be inserted in one direction. Unlike incandescent light bulbs, which illuminate regardless of the electrical polarity, LEDs will only light with correct electrical polarity. When it comes to through-hole LED’s a polarized component usually has two pins.

If a polarized component is inserted incorrectly it may not work at all, or it may smoke, spark or fail. It’s a little bit harder to determine the polarity with Surface Mount LEDs (SMT LEDs). Surface mounted device LEDs (SMD LEDs) are electronics components without the connecting wires used with through-hole devices. Although initially intended for automatic manufacturing their use has expanded into hobby electronics. Smaller components lead to more compact circuitry and smaller devices. In fact, some components are available in SMD versions only.

Continuity Tests using a Multimeter

Often the easiest way to determine polarity of an SMT LED is by using a simple multimeter. This is achieved by carrying out a simple test: we set the selector to ‘Diode’ or ‘Continuity Test’ mode and place a probe on each end of the LED. Usually, the multimeter will supply enough current into the LED which will just barely light it up. However, there’s no guarantee your meter won’t over-do the current, so we recommend doing just a quick touch, or putting a resistor in line. The black (common) lead on the multimeter indicates the negative (cathode) lead, and the red indicates the positive or anode side. It will only emit light when the negative probe is on the cathode end and the positive probe is on the anode end. When the voltage across the p-n junction of the LED is in the correct direction, a significant current flows and the device is said to be forward-biased. If the voltage is of the wrong polarity, the device is said to be reversed biased, very little current flows, and no light is emitted. Of course, the best method to determine the polarity of your LED, the pinout, along with all the other specs is to locate the manufacturer’s datasheet.

Visual Inspection

The majority of LEDs have the cathode end marked, however it has been noticed that even within the same range of LEDs from the same manufacturer, there are differences. Red LEDs seem to be the exception, having a mark on the anode end, not the cathode one. Most often if you cannot see any of these markings, a small notch or dot will indicate the negative side of an LED. SMT LEDs typically have a dot or small green line indicating their cathode. Lighthouse LEDs provide a selection of SMD images in their Polarity Guide for 0402, 0603, 0805, 1206 and most all SMD LEDs.

DAINA is the professional manufacturer of SMD LEDs, if you have any question about LED series, welcome to send inquiries to DAINA Electronics. Also, welcome to visit our website to learn more information about super bright LED lights, tape LED, cylindrical LED and more products.

Article Source: http://www.limetrace.co.uk/how-to-determine-the-polarity-of-an-smd-led

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

Thinking about adding security strobe lights and/or sirens to your home security system? Think about why the alarm system was installed in the first place – to keep you and family or employees safe! Strobes and sirens can be wired to sound for different alarm occurrences such as fire or burglary.

If a burglar sees you have an alarm system they may very well bypass your property. Criminals rarely want the hassle of dealing with the alarm system since it increases that they may be detected and caught. Short of the criminal bypassing your home – you want to limit the amount of time the intruder is in your home. Here’s where strobe lights and siren can be extremely effective! Imagine if you violated someone’s property and sirens and bright strobe lights start going off – what would you do? Most people would get out of there!

There are a few main purposes behind the idea of adding security strobe lights and sirens to your home or business alarm:

• Let the criminal know he has been detected.
• Let neighboring homes/businesses know someone may have broken into your property or that an emergency is occurring.
• Bright flashing lights direct the police/emergency personnel to your home easily even on the darkest of nights.

Some people question whether a silent alarm may be the better way to go – assuming the intruder may get caught. Even with an alarm system, the chances of catching the criminal are slim to none. Most of the time – these intruders are not in your home long enough to be caught – they want to grab and be gone in minutes.

A silent alarm that does not alert the intruder that his presence has been noted may also put you, your family or employees in a dangerous situation. A loud siren and/or light are much more likely to deter criminals in the act.

When adding sirens or strobe lights to your home security system, keep these tips in mind:

• It’s a good idea to install two sirens (one indoors, one outdoors) as part of your home security system.
• When installing your outside siren, preferably mount the siren towards the front where it can be better heard.
• When installing strobe lights, make sure they are visible from all sides of the house – maximizing their effectiveness in fending off intruders.
• Make sure to test your home security system every few months to ensure sirens and strobe lights are in working order.

Ching Mars is an experienced safety light manufacturer, specializing in producing all kinds of Warning Lights including strobe lights, revolving lights, light bars, security strobe lights and so on. In order to get further information about our security strobe lights, welcome to browse the website of Ching Mars – providing you the highest quality warning lights to protect your personal belongings.

Article Source: http://EzineArticles.com/6639282

A POU water dispenser stands for Point of Use water cooler. This is a kind of water dispenser where the filtration method to make the water clean happens right where the consumption happens.

This opposed to putting up a filtration system that is centralized throughout the entire house. There are many kinds of filtration methods that are used for point of use coolers, such as boiling, ceramic pot filtration, chlorination, cloth filtration, natural or chemical coagulation, pasteurization, sand filtration, and even solar disinfection. There are many benefits to having this kind of filtration system as opposed to the conventional centralized kind.

First of all, a POU water dispenser will definitely be cheaper than having a centralized system put in. That is because you do not have to have construction done on the inner workings of your house. Also, you can just buy one water cooler for an entire house, especially when you do not need that many because there are only a few of you living in the house or because you live alone.

Aside from having a lower price, a POU water dispenser is great for underdeveloped countries that do not have drinkable tap water. As a matter of fact, plenty of charitable foundations have begun making it a point to try and provide these kinds of water dispensers for places that do not have clean drinking water. These kinds of water coolers have the capability to turn ordinary and non-potable water into clean and filtered drinking water. As for people who can afford it, they still have to go through the hassle of getting water bottles delivered to their homes because their tap water is not clean. A POU water dispenser would be able to get rid of that spending once and for all. And not only that, but you also save yourself the trouble.

And last but not the least, you definitely need to get a POU water dispenser because of all the hassle that it saves you. No longer will you have to deal with instances like running out of water at the most inconvenient times because you did not realize that you were out of water, and you also do not have to deal with deliveries that take forever. While it may not sound like much, this can definitely be a big hassle when the time comes that it does happen to you.

When you finally do decide to buy POU water dispensers, there are a few things keep in mind. Make sure that you pick the right size for the space that you have. While a bigger cooler will definitely be able to filter more water at one time, you do not always necessarily need this kind of filtration power. If you do not have enough space or if there isn’t that many people who will be using this filter, opt for a smaller model. This will save you money.

Make sure to buy those that come with the proper filtration method that you want. There are many different kinds of methods, but only one will truly suit you. Figure out what this is and make sure to buy a water cooler with that method.

Founded in 1984, Triwin fulfills the needs of top quality products and equipment in the water treatment industry world-widely. Our main products — residential RO systems, commercial RO systems, industrial RO systems, soften water systems, pure water systems and all water treatment components. If you need more information about POU water dispenser or other RO systems, please feel free to contact Triwin!

Article Source: http://EzineArticles.com/expert/Everett_Woods/615321

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Power factor correction is a process that has to do with managing the essential traits of electric loads that are used to create a power factor of less than one. The main purpose of using power factor regulator is to ensure that the level of power transmission taking place is within safety limits set for the application involved. Power suppliers make use of power factor correction to ensure that home and public building systems are not overloaded, and that manufacturing facilities have an adequate flow of power to operate heavy machinery.

There are two basic ways of engaging in power factor correction. One approach relates to the management of power utilized at the end user level. With this application, a homeowner may utilize various devices to minimize or eliminate unnecessary power usage in the home. This may include the installation of such devices as energy saving appliances, or sensors that automatically turn lights off when no one is in the room.

A second approach to power factor correction involves the work of the power supplier to ensure the transmission network is functioning at optimum efficiency. This will mean ensuring that the level of power generated and distributed is within the safety limits for the network, and is not likely to overload one or more sections of the power grid. This approach often includes fail safe mechanisms that help to compensate when problems arise in one section of the grid, by containing the problem and not allowing it to spread to other sections.

There are both active and passive means of managing power factor regulators. The use of capacitor banks occurs with passive PFC and helps to correct nonlinear electrical loads and stabilize the flow of current. Active PFC usually employs a system that controls the amount of power utilized by a load, keeping the balance as close to unity as possible.

The advantages of power factor regulator apply to both the end user and to the supplier. For suppliers, adjusting the nature of the power flow to keep it within acceptable limits means less time, expense, and lost revenue resulting from system failures. End users who choose to engage in power factor regulator enjoy the benefit reduced power bills, as well as preventing extra wear and tear on electrical devices around the home or office.

YUHCHANG is a professional and experienced manufacturer of automatic power factor regulators. High quality electrical capacitor and capacitor bank series are also provided. If you need more information about Yuhchang capacitor supplier, welcome to visit our website and feel free to contact us!

Article Source: http://www.wisegeek.com/what-is-power-factor-correction.htm