By:Shawn Davis

There are many reasons to own and use hidden digital video recorders. You may need them to keep an eye on things around your home, office, warehouse, or other places of business. You may even need to have one to protect your mobile home, vacation home or barn where you keep your valuable horses. But there are also times when the need for hidden digital video recorders goes beyond watching some place stationary. Sometimes you need hidden digital video recorders to be as mobile as anything on four or more wheels. When you do, you may want to consider a mobile security VCR.

These types of hidden digital video recorders are especially necessary for use with police forces. We’ve all seen numerous accounts of traffic violators on film, being pulled over for speeding, reckless operation, drunk driving, but hidden digital video recorders can also be a critical factor in the prosecution of criminals, who have been involved in robberies, kidnappings and other types of felonious activities. These hidden digital video recorders are also great for private investigators.

Other types of agencies can also benefit from the use of hidden digital video recorders. They are great for use in buses and taxis as well. Can you imagine how beneficial it would be if, for example, a taxi picked up a suspicious character for a fare. Then later when questioned by police, there would be a perfect video record of the person in question, which could be quite beneficial for identification purposes.

By:David Stone

Plasma televisions have flooded the market, but there are some important facts you should know first. They are a premium price but they offer one of the best combinations of features for a High Definition television today. Plasma screens offer a flat screen of 4” thick that have one of the best pictures available. The newest televisions have resolution capabilities of up to 1080p. This is a huge leap in resolution compared to DVD which only has capabilities of 480i. This means that HD capable plasma televisions can produce more than twice the resolution of a DVD.

The reason that a plasma television can produce such images in a thin layer is the technology that was actually created about 35 years ago. Plasma technology starts with two thin pieces of glass that are filled with xenon and neon gas. The chamber contains all of the pixels which can reach into the millions. This chamber is filled with electric current and it illuminates the pixels that also fill the chamber. This process creates a brilliant picture that is almost unmatched by any other screen. Plasma screens offer very high resolution that is bright and has a wide viewable range. You can view the screen within a 160 degree range with no loss in quality.

To incorporate most of the advantages of a plasma television, you must make sure that it has the features that are most up to date. The most up to date features of plasma televisions is that they have 1080p resolution. You also need multiple HDMI connections because you will be connecting more than just one HD component. DVD players, cable boxes and game consoles all have HDMI capability that makes the best use of your television. Make certain that your plasma television can handle at least two HDMI connections, or it is out of date. Component video is still a great second option, but it will not create as good results. Remember that your plasma television is a center piece for your technology and it should be capable of everything that you own.

Find out all the most up to date information on plasma televisions at www.my-plasma-tv./

By:Maxine Schel

There are momentous events that occur during our lives that later on, we will end up wishing we had on tape. Photographs are no longer the preferred method of storing memories, giving way to video cameras instead. As more technological advances are made, there are bigger and better video cameras on the market available for purchase. It is ultimately up to you to decide which video camera will best suit your needs.

A video camera can be a major purchase, and should be a well-rmed and researched decision. There are a lot of resources available online or at your local bookstore that would be very helpful in your knowledge quest.

If you plan on recording for long periods of time, more than a couple of hours, you should try to opt for a video power that is an energy saver, or else you will spend your recording time changing out and recharging batteries. It is a good idea to have a couple of spare batteries anyway, just in case.

Most video cameras now come equipped with a viewfinder, which is much handier for the user than looking thru a little round hole, or eyepiece, to see what they are recording. The downside to recording and using the viewfinder, however, is that it sometimes can be a bigger drain on your battery time than just using the eyepiece. Using a viewfinder makes it much easier to film hard to reach shots, while allowing you better control over what you are filming.

Before making a purchase, you should familiarize yourself with digital and optical zoom. With optical zoom, you tend to get a nice sharp, well focused image. Digital zoom doesn’t offer a sharp picture; it’s basically a magnifying effect. You will probably be much better satisfied with a video camera that has both digital and optical zoom. Focus more on the optical zoom if you want high quality videos.

Many of today’s video cameras offer a feature called image stabilization. This feature helps prevent the video from being shaky and jumping all over the screen when you watch it, therefore producing a higher quality video. Image stabilization helps to filter out the normal shaking of the camera.

Some video cameras can now pose as still picture cameras as well, thus eliminating the need to take two cameras to events. You can get live and still shots in one piece of equipment.

One neat feature of some video cameras is the ability to record to DVD, which recently, seems to be the most preferred type of media.

If you are a newbie when it comes to shooting film, you can also opt for a video camera that will basically do everything for you but hold the camera. They come now equipped with auto focus and light adjustments, so all you have to do is press a button and shoot.

There is such a wide range of video cameras on the market today; it can become confusing when trying to decide which one will best suit your needs. Doing your homework beforehand, can help save you a lot of time, and possibly help ensure you truly do make a wise investment.

By:Jennifer Bailey

Digital video recorders (DVR) are recording equipment that can record and store digital video on a computer. These can record audio as well as video data from multiple sources.

A DVR is basically a hard drive that can be connected to the computer and to other video sources such as a VCR. It has a tuner which captures the signal using a cable, antenna, or a satellite. The analog signals are compressed and converted into digital signals, which are then stored on the hard drive. A built-in MPEG-2 decoder converts the digital signal back into analog signal when it has to reach the television for viewing. Each DVR has an operating system within the hard drive.

There are several advantages to digital video recorders. They do not require a recording medium like tapes, as the data is stored on the DVR itself. Another main advantage is that the recording and playback can be done at the same time. Using this, even a live program on the TV can be paused, in the sense that the program can be recorded on the DVR and then viewed instead of the live program. However, the space within a DVR is limited, which is its main disadvantage. DVRs also have a live-TV buffer that keeps them in a constant recording mode for an hour or more.

Another interesting feature of DVRs is their search tool, which allows searching of a particular program by name of the program, name of the actors, or even by keywords. Some DVRs can be programmed to record some programs that have certain words in them. DVRs have recording capacities ranging from thirty hours to 320 hours. This also depends on the quality of the stored files.

The main categories of digital video recorders are TiVo, ReplayTV, and UltimateTV. Some of the top manufacturers of digital video recorders are LG, Panasonic, Philips, Pioneer, RCA, Samsung, Sonic Blue, and Sony. Prices range from $600 to $1,200 or more, depending on the brand, the model, and the options provided.

By:Rory H. Hawkins

Night Vision is an optical device consisting of high-quality image intensifier tubes and optics that amplify existing light. Night Vision makes it possible for you to see in conditions that are otherwise not possible for naked eyes. Night vision products are empowered with Infrared Illuminator that provides a light source for the system. The light source amplifies the images and as a result we can see the objects in dark. We can see the objects in low light conditions as well such as in dark caves, where there is no source of available ambient light.

The working principle of a Night Vision is not at all complex. It is quite interesting on the contrary. In very dark conditions, the night vision gathers any available light like starlight, moonlight or infrared light through its front Objective Lens. The objective lens transmits this light through a set of optical lenses and passes it to the Electronic Intensifier Tube (EIT.). Located on the front of the Electronic Intensifier Tube is the photocathode screen that rap out electrons to produce a high level of energy.

A high static field is generated from EIT that pushes the electrons at the back of the EIT. This is a very sensitive layer and is known as phosphorescent screen. The electrons gathered, strike the Phosphorescent Screen with indefinite high speed and allow it to illuminate. During this process, an image is produced that gets magnified by the Ocular Lens located at the back of the Night Vision. The ocular lens makes it possible for us too se in the dark.

The image that you perceive in the Night Vision is not at all clear at the initial level. It appears as an indistinct, blurred green color. The Ocular Lens slowly makes the adjustment that fits your eyesight.

There are different types of Night Vision glasses available in the market are Generation1, Night Vision Monocular, Advanced Night Vision, Night Vision Binocular and the Audio Monocular. The Generation 1 works without active infra red light source. It amplifies the existing light several thousand times to make our vision clear in the dark. It is a low budget night vision and most popular all across the world. The other types of Night Vision are for specific purposes only and quite expensive too. They are mostly used by professionals and are not for ordinary fun and adventure loving persons.