Solar LED lighting technology requirements

With the development of solar photovoltaic technology and progress , solar energy as a new , first applied in the civilian aspects of the lighting, solar lighting products due to the dual advantages of green energy . Solar LED lights is a new generation of green lighting products, its main components , including solar photovoltaic (PV technologies ) and semiconductor lighting (LED). Because LED solar lights integrated solar photovoltaic and LED solid-state lighting advantage of solar LED lighting system to achieve the perfect combination of new generation and new sources of energy . However, solar lighting design, involving light , solar systems, battery charge and discharge control many factors , any one part of a problem can cause product defects .
A first look at the composition of solar lamps :
The key solar photovoltaic technology can be combined with LED panel lights perfection lies both with direct current , low voltage and can match. Therefore, the combination of the two DC solar cell does not need to be converted to alternating current , thus greatly improving the efficiency of the entire lighting system. Meanwhile, aid and network technology or the use of battery charge and discharge energy to the more obvious advantages .
1 , solar panels
2 , Charge Controller
3, battery
4, a load
5 , shell lamps
Second, the design uses require attention: ( to LED lawn example)
1, the characteristics of the LED close to the regulator diodes , voltage variation 0,1 V, operating current may change around 20mA. For safety, use a series current limiting resistor under ordinary circumstances , a great energy loss is obviously not suitable for solar lawn lights , and LED brightness varies with operating voltage. Step-up circuit is a good idea, you can also use a simple constant current circuit , in short, must automatically limit , otherwise it will damage the LED bulb lights.
2 , the peak current of the LED generally 50 ~ 100mA, a reverse voltage of about 6V, careful not to exceed the limit , especially when the solar battery cell or the reverse load , high peak voltage booster circuit , it is likely to exceed this limit, damage LED.
3, LED temperature characteristics well, the temperature rise 5 ℃, flux decreased by 3% , the degree of use of the summer to pay attention .
4 , the working voltage discrete large, same model , same batch of LED operating voltage have some differences , not in parallel. Must be used in parallel, you should consider both streams.
5 super bright white LED highbay color temperature of 6400k ~ 30000k. Currently, low color temperature super bright white LED is still not entered the market, the penetration of solar lawn lights with super bright white LED manufacturing is relatively poor, so pay attention to the optical design .
Lot 6 , electrostatic effects on ultra- bright white LED flood lights, the installation must be anti-static facilities , workers have to wear an antistatic wrist. Electrostatic damage by ultra- bright white LED was probably not see with the eyes , but life will be shorter.
7, the system should pay attention to a combination of photosensitive sensors , solar lights require light control switch, some designers tend to use the photo resistors to automatically switch lights , solar cell itself is actually an excellent light-sensitive sensor , with it does photosensitive switches, better features than photoresistor . For the application of solar garden is not big, but for just using a 1,2 VNi-Cd batteries for solar lawn lights , solar cell element consists of four pieces of solar cells in series , the voltage is low, the lower voltage under low light , even days without black voltage has been below 0,7 V, causing light control switch failure. In this case , just add a direct-coupled amplification transistor , you can solve the problem.
8, according to the size of the battery voltage level control loads , solar lights consecutive rainy days tend to be very demanding maintenance time , which increases the cost of the system . Our continuous rainy days when the battery voltage drops to reduce the number of energy-saving lamps LED or access , or to reduce solar lamp lighting time per day , which reduces the cost of the system .
9 , flashing light changed , gradually dimming light energy is a good way , it can increase the effect of solar irradiation lawn , on the other hand can control by changing the duty cycle of the battery flashing average output current to extend the system to work on time, or under the same conditions , can reduce costs.
10 , three-color color energy efficient light switch speeds. This problem is very important, it even determines the service life of solar lawn , up to 10 to 20 times the starting current three-color color energy efficient lights activated, the system will result in a withstand voltage of a significant decline in such a large current circumstances , solar lawn will not start or repeated start , causing damage to the final 11 , is currently not able to use solar lighting on the main road . Main road illumination lighting with statutory requirements , the current of the solar cell conversion efficiency and price, not able to meet this requirement. But in the near future with the improvement of all aspects of technical standards , will be used in solar lighting on the main road .
12 , on the storage capacitor , solar battery life of more than 25 years, the life of ordinary batteries in 2 to 3 years, so the solar power battery is the weakest link in the system . Energy storage capacitor can solve this problem to some extent . Energy storage capacitor life can reach more than 10 years , and the control circuit is simple, but the high price limits its application is currently only used in some traffic lights and decorative lights on . With the improvement of technical standards , product prices fall , it will become one of the most promising solar cells supporting the ideal energy storage element .
In summary , the solar cell is a huge PN junction , which convert solar energy into electrical energy. LED spot lights is another can convert electrical energy into light the PN junction , its conversion efficiency has been improving , and believe it can achieve the level of energy-saving lamps , and life can be , but can reach more than 100,000 hours , this is the real meaning green light on .

Travel to Different Places with Protected USB Flash Drive

USB drive, as portable storage device with massive storage capacity, is the best choice for storing and transferring confidential data from one place to another. People use USB drives to store confidential information as well as for the purpose of storing personal stuff which may include music files, family photos, videos, letters and etc. Sometimes people need to transfer their data from one PC to another PC.

These small storage devices also come handy when you are travelling and are away from your home town.

For instance, businessmen often are required to travel to different cities and countries for the purpose of promoting their business, and need to carry business information with them. Since USB drives are small enough to carry easily while they have the capacity to store GBs of data, they have become the preferred choice for many businessmen.

Along with these benefits and advantages of USB drives, they are capable of causing a security risk in cases of their loss or theft. They may result in privacy breach and data lost, particularly if they contain sensitive information like your financial records, business plans and bank statements.

Because of the extensive use of USB drives all around the globe, the security of data they contain becomes a critical issue for almost every entrepreneur. The basic reason behind this is the fact that USB drives are small enough to get stolen or lost easily. You may forget them wherever you take them like at airport, office working table, internet cafe or at your friend’s home; and in that case your privacy definitely is at risk!

A recent study shows that the cost of privacy breaches and data loss due to lost, misplacement or theft has reached up to three million dollars. All these facts highlight the significance of using a protected portable storage device.

Now, when it comes to protecting your data, the most common thing that comes to our mind is password protection. Same approach goes with the USB Security. If you do not want to complicate yourself with knotty technical procedures, you can choose to simply password protect USB drive and all its data.

USB Security, one of the most powerful USB locking software programs, creates a secure boundary around the data that you want to protect in your USB flash drive. So that whenever someone tries to gain access to your USB drive’s data, it prompts for a correct password; the failure in the entry of which puts barricades between your data and the unauthorized intruder.

You can carry USB Secure on the same USB drive and run it without the need to install it on a host computer and USB Secure can be used on any USB drive that turn a cheap and commonly available USB drive into a Secure USB drive.

Protect Children out of Online Predators with Rich Features Provided by Parental Control Software

Parents nowadays are most concerned about children’s online safety, for porn, violent content, and Internet predators will lurk on the Internet, which will affect children’s physical and mental health.

The largest group of viewers of Internet porn is children between ages 12 and 17. 89% of sexual solicitations were made in either chat rooms or Instant Messages. One in five children who use computer chat rooms has been approached over the Internet by pedophiles. More than 11 million teens regularly view porn online.

As your children get older, you will face even tougher questions surrounding their right to privacy and what you have a right to know. Finding a balance between keeping your child safe and ignoring the obvious is a tough job, but it is possible. Keep your computer in a location where it is easily seen by you; if you have a laptop in the house, be sure your children are using it in a central location. And remember, communication goes a long way toward finding out what is going on. Talk to your kids and encourage them to speak up if they encounter something online that makes them uncomfortable.

Don’t you want to know what your children are doing on their computer? Who are they talking to? Do they take secret chat conversations with adult strangers? Do they surf to adults sites? Is all this online communication safe? Can they post something that’ll get them in trouble? Could they be cyber bullied? Do you want to restrict your child’s browsing in web browser?

This keylogger is designed for parents to monitor child’s online behavior. With this software, parents can grab screenshots, record sent and received mails, record chatting messages, and monitor and record visited websites. So parents shield your children from cyber bullies, predators and adult oriented websites, and ensure you have the control you need over children online activity.

The main features of keylogging software include taking screen snapshots, taking screenshots to provide you an easy way to review screen history, monitoring emails, recording all emails sent and received with details. Block emails which you consider is inappropriate and harmful to your kids, recording all visited websites with HTML tile and URL, allowing visiting specified websites or block any websites as you like. Support IE, Firefox, Chrome, Safari, Opera and many more browsers. What’s more, it can also monitor and record latest version MSN Messenger, Windows Live Messenger and Windows Messenger chatting conversations. Block IM chat outgoing files with specific file names and block specified users from sending files via IM applications.

Use Keylogger to Eliminate the Worry about Improper Use of Your Computer

Recently, many companies offer keylogger application which enables users to keep track of all keystrokes pressed on the keyboard, while this kind of application can run in hidden mode. As some people have confronted computer abuse by others, many of us are used to store confidential or private information in our own computer, which includes working data, private photos, family videos, personal financial information, etc. And some parents may face such kind of things that their kids are addicted to computer and the Internet, which leads to the children spend too much time over the Internet. Parents completely know about the potential dangers of the Internet. On the one hand, spending too much time on the Internet must result in physical harm to kids’ health. On the other side, there are too many dangers on the Internet, such as the Internet bullying. Therefore, the keylogger tool emerges as required.

And now there are some suppliers of key logging tool that help users to trace entire pressed keystrokes in exact pattern with accurate date and time. Developer offers keylogger application that automatically starts monitoring user activities at Windows startup and some even launched keylogger for Mac to meet the need of Mac users.

No matter the keylogger for windows or the keylogger for Mac, they all can help users in many ways. Employers can use it to keep a fix eye on what exactly their employees are doing in office during working hours, this monitoring program can help enterprise to keep confidential and internal data safe and, what’s more, it can force the employees to work more efficiently during working time. Parents can install these types of software on their children system to monitor entire activities performed by their children on computer in their absence. Married couples can also use this type of software to know with whom their partners chat in their absence.

Specific computer monitoring software can efficiently work on specific platforms. Keylogger tool that tracks entire users activities while running in stealth mode as the application is completely invisible from desktop, add and remove program, start menu, task manager and control panel. With the assistance of keylogger application, you will master all your computer’s activities when you are away. And if you are an employer of a company, the employee’s activities on the computer will also under your control. As a parent, you also needn’t your kids will fall in the network trap and be harmed by the Internet bullying.

Password Protection for Folder Can Block Unauthorized Access

If you store your private or confidential data or information in your computer or share the company’s secret data on the LAN, you may be concerned about the data security in your computer or unauthorized access to the shared data on the LAN. If you want to save passwords or login info in the ‘My Documents’ folder, or keep files that are unsuitable for kids or other personal associates, or files with appreciated material that can be stolen or lost. Significant files and folders like these needs password defense so that intruders or illegal users cannot access, read, view, copy, move or delete them. Files and binders left defenseless can lead to theft, data loss and openings of your privacy, costing you discomfiture, money, lost data, maybe even your job. If you are a unpremeditated PC user, and want to defend personal photographs, videos, pictures, economic info, passwords, individual letters and info that would be unsuitable for your kids, networks or co-workers.

Don’t worry, the third party software such as folder locker will provide you with the more comprehensive protection for your data. It can hide your files and folders securely from getting viewed and searched by unauthorized users. It can also make your files and folders completely inaccessible for all the other users except you, can also make your data write protected and delete proof.

When someone tries to access any of the protected file or folder, a dialogue box appears on the screen asking for the password. If correct password is entered, only then the user gets access to the file or folder, otherwise not.

This software won’t alter your protected files and folders. With it, you can password protect files, folders which can contain drives, installed programs and applications, and system wide extensions. Since folder locker is completely compatible with all favors of Windows, Vista and Windows 7, 8, you can easily password protect folders in any Windows OP.

Password Protecting folder is suitable for people who wish to protect significant files or highly subtle data. It is also suitable for people who require moving data from one computer to another using email, USB/External drives or people who require upholding secure backups of their work on Hard Drives or CD/DVD-RW. Folder locker uses 256-bit AES on-the-fly encryption. Unlike slow encryption packages, Folder locker’s encryption takes instants even if it is GBs of data. This is due to the progressive knowledge called ‘Virtual Drive Encryption’. Using this technology, folder locker doesn’t decrypt each and every file when it mounts the data controlled in the ‘locker’, it decrypts only those files that user want access to the things.

USB Security-A Critical Issue for Entereprise

As nowadays almost data and information are stored in digital format which are more portable and convenient for receiving, storage and transmission. USB drive, everyone should admit that, is the best choice for storing and transferring confidential data from one place to another. People use USB drives to store confidential information as well as for the purpose of storing personal stuff which may include music files, family photos, videos, letters and etc. Sometimes people need to transfer their data from one PC to another PC.

These small storage devices also come handy when you are travelling and are away from your home town. For instance, businessmen often are required to travel to different cities and countries for the purpose of promoting their business, and need to carry business information with them. Since USB drives are small enough to carry easily while they have the capacity to store GBs of data, they have become the preferred choice for many businessmen.

Along with these benefits and advantages of USB drives, they are capable of causing a security risk in the cases of their loss or theft. They may result in privacy breach and data lost, particularly if they contain sensitive information like your financial records, business plans and bank statements.

Because of the extensive use of USB drives all around the globe, the security of data they contain becomes a critical issue for almost every entrepreneur. The basic reason behind this is the fact that USB drives are small enough to get stolen or lost easily. You may forget them wherever you take them like at airport, office working table, internet cafe or at your friend’s home; and in that case your privacy definitely is at risk!

A recent study shows that the cost of privacy breaches and data loss due to lost, misplacement or theft has reached up to three million dollars. All these facts highlight the significance of using a protected portable storage device.

Now, when it comes to protecting your data, the most common thing that comes to our mind is password protecting USB. If you do not want to complicate yourself with knotty technical procedures, you can choose to simply password protect USB drive and all its data.

USB security, one of the most powerful USB locking software programs, creates a secure boundary around the data that you want to protect in your USB flash drive. So that whenever someone tries to gain access to your USB drive’s data, it prompts for a correct password; the failure in the entry of which puts barricades between your data and the unauthorized intruder.

You can carry USB Security on the same USB drive and run it without the need to install it on a host computer and USB Security can be used on any USB drive that turn a cheap and commonly available USB drive into a secure USB drive.