Category Archives: Accessories

Astronomy green laser pointer – the tool needed for science development

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Laser pointers are widely used for different applications but the most important use is to do astronomy activities like astronomers’ research as well as amateur astronomy. In the dark at nights the beam astronomy green laser can be used for pointing accurately individual galactic bodies like individual stars. In addition they can also be used to carry out astronomy presentations, lectures and other kinds of astronomy activities. In other way they can also be attached to telescopes so as to align it to an individual star or another sky body. This application of the astronomy green laser pointer makes the alignment much easier and correct than using eye-measuring.

The presented here types of astronomy green laser are convenient and easy to use, and suitable for different occasions, especially for astronomy. They are made with high quality technologies and for their make are used the latest technologies in producing astronomy green laser pointers. The materials which they are made of are also high quality and do not allow the laser pointer to easily break down.

The materials used for them are high quality titanium, aluminum and, of course, stainless steel and plastic for the corpus of the device. The ergonomic design makes the user look heavy and sophisticated. Also the design is simple â?? with its clicky button it can easily be operated with. The device is small which allows to be brought everywhere where it is needed.

The astronomy green laser pointer is high powered and this allows to be used for different research of the sky and the different bodies in it. Its power may differ, but the most common among the presented here is the 200 mW green laser pointer with a wavelength of 532 nm. The device is powered with alkaline batteries so when they are out of energy they can easily be replaced. Of course, when it is not used the batteries should be taken off in order not to damage the device.

The safety considerations of the astronomy green laser pointer are the same as the other types of laser beam pointers. The main point is not to look directly to the beam of the pointer and not to point the laser pen at a person and especially at his eyes. Knowing these main instructions for astronomy green laser is the key to use it and to continue the development of science.

 

The Benefits Of Homemade Solar Panels

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These days, environment issues have become one of the most important aspects in our day to day life. Solar energy is possibly one of the most natural and safe ways to reduce your ecological footprint, which is a measure of your demand on the Earth’s ecosystems. However, pre-built solar energy systems can be really expensive and your budget may not be enough to afford them. That is the reason why you should consider making your own homemade solar panel. It will surely be smaller, but it will help you to decrease your impact on the environment, not to mention the insignificant shock for your pocket.

Homemade solar panels offer five top benefits you should take into account. The first and most vital is the one regarding to the environment. It s a fact that a homemade solar panel may not be enough to power an entire house, but it could reduce your electricity use. Power provided by the electric companies comes usually from non-renewable resources, so if you shrink your demand, your footprint will certainly smaller. Another great aspect of building a homemade solar panel is that you can get to save almost around 60% percent over the cost of a commercial panel. You should add to that the extra money you can save due to your smaller electricity consume.  By constructing your own homemade solar panel, you can get to challenge your brains, as you need to understand how these panels work and how to design one. Then you could even make a larger panel and get your whole house run by solar energy. The cost of this kind of projects depends mostly on the amount of power you want to obtain from your homemade solar panel. The number of cells you use will define how much power you can get out of the panel.  More cells mean more solar energy, but it also means a higher cost. Nevertheless, you should keep in mind that many materials that you already have at home can be used for the project and you can save a little more. Finally, let’s talk about how much time and sweat this task could require. Not much, but manipulating the fragile cells should be carefully done, with no hurry whatsoever. Once you have done some research and you are perfectly aware of how solar energy works, you should get the materials and get to work. To build a solar panel you absolutely need to buy tabbed photovoltaic cells, because there is no way you can have some of those at home. Deep picture frames or shadows boxes and a clear plastic cover are also required. You need a solder and soldering iron, as well as Popsicle sticks, insulated and non-insulated wire. Make sure you have a multimeter, an AC inverter and a battery holder. RTV silicone and a schottky diode are necessary, too.

And that it is, you have everything you need to start to build your own homemade solar panel and turn your place into an environmental – friendly home. ?

 

Green Laser Pointer Attracts More and More Young People in US

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I heard over 5mw green laser pointers are prohibited in US and Australia, but one can see American and Austrialian people holding green laser pointers nearly everywhere. I came to realize that itâ??s just illegal to purchase or produce high powered laser at home, while they have the greatest freedom to purchase it from abroad, esp. China, a laser power country. That also can explain why Laserto.com and Highlasers.com are winning more popularity in US, England, France and Germany.

I once wondered why so many over 40 ys old male in US are so crazy about green laser pointers, but the fact that some well-known laser companies such as Laserto.com states that 75% of their customers are 35-45 age group. The 2007 survey set by Laserto.com proves that 65% of this group are just for entertainment uses, such as use a green laser to burn stuffs, pop balloons, cut plastic tapes, light matches or light cigarettes, or simply holding this amazing gadget makes them feel young and refreshed by the laser beam. 20% of the people use it for more pro uses, such as for astronomical, military, or medical uses(some use it for better dental treatment, some for acupuncture,ec.)For this group, Gehenna series 200mw green laser is their favorite used laser, for this high-end and high-powered laser can enable them to do what they want for both dummies and pro uses.

A survey by Laserto.com this year reveals that green laser pointer is eyeing for the kids market, coz some kids green laser lovers say, they clamour for green laser pointers because they make them feel cool and grown-up .Thatâ??s true.

The report shows that 15% of youngsters aged 16-25 now use laser pointers.

A green Laser Pointer – What features We Should Look into and Use Carefully

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There is no denying that fact the invention of the green laser pointers are much more sophisticated and having earned much popularity and recognition in the modern era, when fountain pointers were invented during 10th century. Those pointers were made of bird’s feathers. It was a quill pointer. People were so much interested in the usage of the fountain pointers to express their inner views and feelings. Writing was the strong platform of the expression of the human emotions. Since then it was modified and upgraded through the passage of time. Later, the self reservoir ink fed fountain pointer earned much popularity among the next generation.

Now the latest invention of the laser propelled pointers have opened new avenues to people, to make the better utilization of the laser pointers. These pointers are much more sophisticated with multi activities. The salient features of these pointers have distinguished these unique models from other pointers. It is equipped with high quality laser beam which will help someone to write freely and smoothly in night, this laser beam is visible in the room full of light.

A laser pointer can dart in the room without any hindrance. One can highlight the projection, any mapping chart and pointing anything. The inception of the green laser pointer is extremely important because professionals and those who like to write can take the full advantage of the multi functionalities of the laser guided pointers.

However, as a part of pre-emptive measures one should take some precaution regarding the usage of the green laser. It is to some extent detrimental to the vision. So while using this pointer one should take proper care. One should not shine this beam on to jet plane or running vehicles or automobiles. It will be dangerous. So the proper utilization of green laser pointers relies on users who run the risk of using this fantastic and excellent pointer.

Green Laser Pointer Reviews and Recommendation

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Laser pointers are not exclusive products for science and tech talents and experts any more. They are widely used in presentations, speeches, and lectures as they allow speakers to point to areas they intend to arouse listeners’ attention. Appearing on the market circa 2000, green laser pointers boast in popularity.

Comparing to red laser types, green laser is about fifty times brighter – even we are miles away from the laser light, we could see. Green types’ high range makes this electronic gadget commonly used in military and rescue operation. This kind of laser helps us easily find our target even in a remote desert or ice-covered mountains.

Usually, the higher power a pointer has, the more expensive it will be. The low-end green laser pointers are sold at about while the high end types might cost you up to several hundred dollars. If you want to save on your purchase, the first and the most important thing is to choose an honest, reliable laser suppliers.

PickEgg offers green laser pointer varied in types and sizes. Although it only has been established for less than one year, they have received praises and appreciation all over the world. Big Head 100mW 532nm Green Laser Pointer here is perfect kit for astronomers, professors, teachers, doctors, student presentations, etc. 30mW Green Laser Pointer Pen could offer amazing, Kaleidoscopic morphing effects. Mini Green Laser Star Projector Light creates millions of moving and morphing star in your room once it turned on – ideal for home party, dance, wedding and so on. There are also many other wonder green laser products at this website. Almost all of their retail prices are lower than you buy from your local department stores or malls or other online wholesale electronics stores. Plus, free shipping is available site wide.

Purchasing a laser pointer which is in line with your preferences and actual requirements needs you to spend time and research in advance. Be careful about cheap laser products. If you unfortunately buy from a dishonest supplier, you might get your eyes hurt.

Have Fun with Green Laser Pointers

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Green laser pointers are the most popular laser pointers. These electronics gadgets really rocks. Now, technology development allows everyone of us to afford one. The primary purpose we buy laser pointers is for our demonstrations and presentations. But once we have such devices, why not have fun with them. Recently I bought a 3 in 1 200mW Green Laser Pointer & Flashlight from PICKEGG.COM, which could be used as flashlights and laser pointers at the same time. I have studied how to use it in a fun way foe a while and I would like to share with you.

Pet playing toy or pet training toy. No other toys could match its functionality and interestingness for having fun with pets. These tools could fulfill out pets nature to hunt while not drive them crazy. But don’t point your laser directly in the eyes of your pet, you might hurt their eyes.

Light up cigarette. Green laser pointers are especially effective in lighting up a cigarette. Only seconds, you could see how powerful a green laser is.

Self-defense. Laser dazzler, a kind directed-energy weapon employing intense visible light, could cause temporary blindness or disorientation.

Laser show. Scattered light spots could be also emitted by laser pointers like 80mW 532nm Green Beam Laser Pointer from PICKEGG offers four kinds of laser beams. They are great tools for adding playoff atmosphere in parties or pubs.

Laser beam refraction show: when you point your laser through a crystal, you could create fantastic laser dance with numerous laser beams.

There are certainly a lot of other ways to have fun with laser pointers. But when you enjoy yourself, don’t forget to take some safety measures and bears some warnings in mind. Don’t use your laser to point to another person’s eyes or face directly. Make sure that you use your device in a controlled environment. Wear laser safety goggles when you have to deal with some high power laser pointers. No matter what you would take advantage of this electronics device, your personal safety as well other people’s is the most important.

Make Your Own Solar Panels

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Once you have made up your mind and decided to go for a homemade solar panel, you need to make sure you already have all the supplies you need to build it.  To make your own solar panel you need to buy tabbedphotovoltaic cells. You should keep in mind that these are not cheap, but the more cells you use, the more power you can obtain from of the panel. Deep picture frames or shadows boxes and a clear plastic cover are also required. You need a solder and soldering iron, as well as Popsicle sticks, insulated and non-insulated wire. Make sure you have a multimeter, an AC inverter and a battery holder. RTV silicone and a schottky diode are necessary, too. Now you can get to work and make your own solar panel.

First of all you need to put the cells facing down onto the plastic pane in order to place the lined side facing the sun. If you want to increase the voltage, you should place the cells aligned on one wire. To increase the current they should be lined connecting to separate parallel wires. As you already know, each solar cell has positive and negative sides. Current will flow across the cells in a series when the negative side is connected to the positive through the tabs on the side. That is why all the tabs should be oriented to the same direction and they should go from the top of the cell to the bottom of the next one.

After you have done that, you should solder the tabs together. To do so, you need to peel back the tab of each cell, and then you should wet the end of the tab with soldering iron. Next you need to be fast and pressure the bottom of the cell onto the tab with a Popsicle stick. You should do that until all the cells are attached, with tabs sticking off. The following step is gluing the cells to the frame by applying silicone to the facing up sides.  Make sure there is no silicone between the solar cells and the plastic, because it can be an obstacle to the normal sunlight flow.  

Then you need to align the frame onto the sheet and press down so the back of the cells can bond to the frame. You should turn over the panel and remove the plastic cover. To connect the wires you should check that the tabs are actually sticking out of the cells on the sides of the panel. One side has the negative tabs and the other, the positive tabs. Negative tabs should be attached to the lined sides of the cells and the positive tabs should be poking out from the bottom of the cells.

With a solder and soldering iron, you should solder a wire which connects all the negative tabs. Once you have chosen one side of the panel for the cords to stick out of, you can solder the end of an insulated wire to the corner or the center of the non-insulated wire. Then you should glue it towards that side. Enough wire should be left to connect to an AC adapter or a battery holder. You need to repeat the process with the positive tabs and other piece of insulated wire. Finally you can put the plastic cover on top, and two wires should be coming out from the panel.

As you can see, you can make your own solar panel in a little time and before you can notice, it will be ready to be used.

Standard battery charging base

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Efficient, cheap and reliable battery charger designed to achieve a variety of ways, but using 8-bit Flash MCU can not only reduce design time, reduce costs and provide safe and reliable products, but also allows designers to work less capacity to perform the upgrade on the spot. Taking into account the cost of charging the battery safety, Hp laptop battery effectiveness of the design and the importance of solutions-based microcontrollers offer many advantages for designers. By selecting the appropriate external and flash memory with 8-bit MCU, engineers can take full advantage of its potential to develop a lithium battery charger off the battery. With 2K of flash memory devices and provide a low cost solution suitable for Philips 80C51 based microcontroller is an example. Flash memory also provides efficient and easy to debug the application code and the conduct of upgrading software on site (if necessary) capabilities. As the design community is not only known and widely accepted MCU 8-bit,HP PP2182D Battery, HP 338794-001 Battery, HP PP2182L Battery, hardware and software development can be rapid. Provided by numerous vendors and a variety of powerful tools for developing applications are not expensive, is another advantage of this approach. Using this method, the design team can not only significantly reduce the design cycle, but also a more complex, and the total project cost of materials (BOM) does not exceed acceptable limits. Nikon EN-EL4 Charger

The integration of peripheral circuits

For example, when the MCU with integrated internal oscillator, the lithium battery charger designed to benefit out of the following two aspects. Firstly, we can do without an external oscillator, thus saving cost and PCB footprint, on the other hand, the internal oscillator can increase the stability of the system startup. Four-channel A / D converter is designed for engineers must be integrated into another chip peripheral circuits of value. In addition to using more external A / D converter is more cost effective, but can also be used to detect the charging voltage, current and temperature of the battery – including battery safely accommodate almost all parameters important operating. Designed to achieve the following objectives by the introduction of the UCM (P89LPC916) not only incorporates the features Suoyouzhexie Erju Yong You can also contribute simultaneously to execute instructions on the processor architectures clock and therefore in the exercise of Ti Gaozhi 80C51 devices for 6 times. Time0 (Timer 0) can easily be configured as PWM output,HP PP2182L Battery, so easy to configure and use the PWM function.

Standard battery charging base

This is specially designed for the rated 700-750mAh, 3.6V and 4.2V voltage limit the discharge of the solution of lithium battery charger.HP PP2182D Battery, HP 338794-001 Battery, HP PP2182L Battery, Load order is divided into three phases: pre-load, the perception of constant current and constant voltage stage phase. When only a little power and can therefore produce an output voltage very low, there must be pre-indictment stage. In this case, you must use low-current charge to protect the battery. However, if the rechargeable battery can produce a higher voltage (> 3V), you can omit the pre-charge stage. Of course, it is the most common situation. Most power is in the constant voltage and constant current charging phase flows from the battery charger. Maximum battery charge current nameplate capacity of the battery of the decision. For fast charging, for example, noted the 700mAh battery, can be 350-400mA current to recharge. In the case of lithium batteries, MCU must be to maintain the normal battery charging voltage is also monitoring the charge current of the battery is fully charged when the process stopped. Temperature monitoring can be used to ensure the implementation of step load safely, because the battery is full, any extra energy is converted into heat. Although the MCU to function as its control of the temperature increased, but today most markets are supplied with integrated overload protection lithium battery, temperature monitoring despite the need for it so rarely used. Dell Inspiron 1100 battery Dell Inspiron 1150 battery

Buck Converter

To design a charger with conical termination characteristics, the most effective and cheapest is to use the converter as a buck switching regulator.HP 338794-001 Battery, Buck converter inductor to store energy. Figure 1a and 1b were the switch is off position of the buck converter schematic work.

PWM control signal from the load switch. When the switch is closed (Figure 1a), the current supply, because the voltage of the charger (charger wine) and flow through the circuit, the charging time of capacitor inductance. When the switch is open (as shown in 1b), the inductor tries to maintain the flow of current induced voltage, but it can not immediately charged. Then, current flows through the Schottky diode and a capacitor. This process is cyclical. When the PWM duty cycle shortened by reducing the switch “through” time, the average reduction in tension. On the contrary, when the duty cycle of the PWM be extended by increasing the switch “off”, the voltage increases on average. Therefore, by controlling the PWM cycle to make the MCU adjusts the charging voltage (or current) can reach the desired output value. In discussing the design details before the need to first discuss with the inductance and capacity of the two main points: Dell Inspiron 1440 battery Dell Inspiron Mini 10 battery

Troubleshooting Power Supplies – Introducing Three Tactics for Rapid Troubleshooting Experience

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Getting frustrated with troubleshooting power supplies?

Look, if you’re troubleshooting the linear types, well they are easy to do and certainly not as frustrating asâ?¦

Switch mode power supplies or SMPS! These suckers are harder to troubleshoot and repair because of their highly intricate circuit designs.

But don’t worry!

I have a few tactics to help you lower your frustration level. See, I recently discovered an encyclopedia-like manual for troubleshooting power supplies â?? specifically the switch mode ones.

And I’ve learned a good deal of repairing tips and strategies from this user-friendly SMPS fixing guide.  

Below are a few of the tactics I learned from the manual which has been a great help to meâ?¦

By the way, you can learn more by clicking this link because the methods listed in the manual are extensive and the limited space here prevents me from sharing more.

(1)

The secondary area of a SMPS contain various amounts of outputs (depending on the design) where every single one is tied to an individual circuit, it is best that you determine early on which part is actually inducing the problem.

Analyze the secondary side filter capacitors and also the secondary output schottky diodes. These components might be the source of failure. Fortunately, they can be easily replaced without breaking the bank.

(2)

You must familiarize yourself with the components located in main and sub area of a SMPS as quickly as possible. This is the cardinal rule of troubleshooting power supplies of all types â?? not just switch mode kindsâ?¦

Familiarization of components is critical because it allows you to solve common SMSP problems like zero power, voltage output that is either too low or too high, and of course�total power shutdown.  

(3)

In order to inspect the negative output, the probe of your ohm meter must be set in reverse. Look at the reading of the output voltage lines and see whether it gives out identical reading.

If the reading is identical and low, then it’s obvious that the issue is located within the output line. So focus on the components in that area and ignore everything else!

As mentioned, you can actually get an in-depth, downloadable guide on troubleshooting power supplies (switch mode) where step-by-step photos and diagrams are generously displayed for easy reference.

If you’re interested, then go right ahead and follow this link for download details: http://www.smpsrepair.info

laser pointers, green laser pointer use for presentation

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The fashionable people normally usually show a lot of amazing things to their friends, neighbors or even strangers in their community. At some point there is not a difficult thing a person to become famous simply because a small business, you have done. Well, you could make a pen style green laser just to give you such an effect, which is a wonderful tool for display.
Usually people want a portable laser for presentations, stargazing and astronomical research application. Ranging from 5 MW to 150 MW, pen style green laser are all entitled to use for presentation. The light green laser pointer is visible both night and day, which is particularly bright in the evening. A laser pointer is always a gadget that makes people full of imagination. If you participate, in the light of a party at a bar, when the green laser pointer is pointed at the bar, would you be surprised and excited by this strange spectacle. Meanwhile, you are undoubtedly a bright star in the bar, and all will remember you and your gadget in your hands.
It must be good for you well-known in your community. Our government is now strongly call for outdoor activities, so that both young and old are all gathered to do much more active exercises in the morning and night etc. It does not matter in the park or a site, there are many people, and this is only the most appropriate time to show yourself and the laser pointer. When the green laser pointer is directed toward the sky, the green laser light is paramount. This cool gadget is a great choice for fans of the stars and the presentation of astronomy. It’s really a wonderful thing when a powerful green laser beam is directed skyward. Moreover, people have a clear observation of stars and other celestial bodies in the night sky. If you want to be known, it cannot be an attempt by the green laser pointer.