Posts Tagged ‘ Complimentary Metal Oxide Semiconductor’



Outdoor Motion Activated Security Camera Light

Written By:
Tuesday, December 28th, 2010

An outdoor motion – activated security camera light offers triple action security against break-ins, vandals, and criminal activity around the home or office. This camera is excellent for monitoring and protecting residences and commercial properties alike.

The outdoor motion – activated security camera light is an all in one miniature security system unit. The unit consists of a strong beam (up to 500 watts) halogen floodlight that is attached to a Passive InfraRed (PIR) motion detector. Whenever the PIR detects motion, the floodlight turns on, projecting a brilliant light on the intruder.

That’s just the beginning. In addition to the flood light and motion detector, the outdoor motion – activated security camera light also contains a state-of-the art high-quality color digital camera that can document the intruder and their activity. This constitutes triple action protection for your home, business or property.

The PIR motion detector is connected to a relay within the unit’s housing. It can detect changes in infrared radiation in its field of view. When a significant change in the infrared signature occurs (for example, when a person walks in front of it) the PIR triggers the relay to the “On” state, turning on the floodlight and the camera.

Most outdoor motion – activated security camera lights contain a high-quality color digital video camera that can also produce still photographs. Thanks to the nature of how a digital video camera works, these units are able to do this task with ease. Here’s how it works.

Outdoor motion – activated security camera lights contain a  a sensor that transfers light energy into electrical energy that can be measured. Images in the camera’s field of view reflect light, which is then focused by the lens onto the sensor. The sensor is either a Charged Coupled Device (CCD) or a Complimentary Metal Oxide Semiconductor (CMOS). The sensors’ measurements are converted into binary digital data.

On standalone digital video security systems, this data is sent to the Digital Video Recorder (DVR), which is much like the hard disk drive of a personal computer. The outdoor motion – activated security camera light has its own on board microchip circuitry that does this instead. It also saves the file to a hard disk type of storage device, usually comes with on-board memory (16 Mbs for example), and a Flash card memory device that accepts replaceable memory cards, (such as a SD card). These files can then be transferred to a computer where they can be viewed.

How can one outdoor motion – activated security camera light provide both still photographs and digital videos? The old movie projector is a good example of how it works.

Before the “digital age” movies were made using a camera that took several pictures per second. Generally to the human eye, 15 to 30 pictures (or frames as they are now called) per second gives the impression of fluid motion. So for every second of movie that we watch, 30 frames (pictures) flash through the projector.

The digital video camera works on the same principle. However, instead of using film tape, the camera creates electronic digital data. So the outdoor motion – activated security camera light can provide either high-quality still photos or digital video.

Another feature of outdoor motion – activated security camera lights includes an adjustable illumination period of the floodlight. Most lights allow an adjustable “on” time from one to five minutes in length. Depending on the settings, the camera may or may not capture images for the full duration, (the larger the memory, the more pictures and/or video length). Many cameras commonly take 3 still photographs or up to 10 seconds of video each time that motion is detected.

Many cameras also provide a time and date stamp. When the camera is installed the on-board clock and calendar are set. Every time the camera is triggered to operate, a time and date are super -imposed over the image to document the exact period of time recorded.

An outdoor motion – activated security camera light performs the functions of a floodlight, motion detector, and camera all in one. It offers triple action security protection for a fraction of the cost of a total digital video security system. These units are not only a handy combination of security features but are easy to install and set-up as well.

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Surveillance Spy Cameras

Written By:
Wednesday, December 1st, 2010

If you need to keep an eye on someone without them getting an eye on you try using surveillance spy cameras. Actually, these cameras not only allow you to keep an eye on someone but also something like a pet, a house, a boat or some other type of property.

What exactly is a surveillance spy camera? Typically, a surveillance spy camera is a special type of digital video security and surveillance camera.

A digital video security camera usually has one of three different shapes. Box cameras look like rectangular box shapes and are typically mounted on walls, posts, and other areas. Bullet cameras resemble box cameras but have rounded ends, hence the name “bullet.” Dome cameras are normally flush mounted on a ceiling or wall and have a small protective bubble or dome that covers the camera. The presence of these cameras is somewhat obvious and their usually is no attempt to hide or disguise them.

Surveillance spy cameras on the other hand are digital video cameras that are much smaller, so small in fact that they are often hidden or disguised as other objects. They may contain their own Digital Video Recorder or DVR and power supply and be an entire standalone system, or they may require an external power supply and be incorporated into an entire digital video security system that has both hidden and visible cameras, a standalone DVR with a Digital Signal Processor or DSP, and a monitor.

How can surveillance spy cameras be so small? Let’s look at how a full-size digital video security camera works then will look take a look at a surveillance spy camera. Digital video cameras have three main components within the camera; the lens, a sensor chip, and the electronic circuitry used to operate the sensor chip and convert its information into digital data (a series of 1s and 0s).

The lens is a highly machined mechanically functioning glass (or plastic) that focuses the cameras field of view onto the sensor chip. Generally, the higher quality and type of lens, the higher quality of the video produced. Lenses determine how far, how wide, and how detailed the target area will appear.

There are two types of sensor chips, a Charged Coupled Device or CCD and a Complimentary Metal Oxide Semiconductor or CMOS. These two chips work a little differently but accomplish the same objective, transferring light energy into electrical energy. These chips are usually square or at least rectangular in shape and usually range from 1/4 inch to 1 inch in size.

Electronic circuitry is used to interpret the chip, read its information, and convert it from an analog signal into digital data. The electronic circuitry may also provide other functions such as audio recording and movement of different camera parts.

Surveillance spy cameras contain the same components but the components are designed to be very, very small while still performing the needed task. For example, most of these cameras are extremely small. Their lens is not a full size variable lens but is a very small wide angle lens instead. This eliminates the need for a large lens attachment.

Secondly, surveillance spy cameras usually use one of two sizes for their CCDs or CMOSs, 1/4 inch or 1/3 inch. The incredibly small sizes of these sensor chips allows them to be used (hidden or disguised) in very small objects such as ink pens (see Security Camera King’s product # HC-PEN for example) or wristwatches (see our product # HC-Watch).

Finally, with the latest improvements in Integrated Circuit (IC) chip technology, incredibly complex circuits can be made in circuit chips that are only 1/4 inch in size also. For example, the electronic circuitry needed to activate and read the sensor, convert the information into digital data, and transmit it wirelessly to a corresponding receiver can be fit with a IC chip less than an inch in size.

In addition, surveillance spy cameras can also have their own miniature DVR in the form of a small memory chip. As computer memory technology advances, these chips become smaller yet hold more data. The data on the memory chip can be downloaded to a personal computer using a USB cord.

Security Camera King has a very wide assortment of surveillance spy cameras available for purchase. These cameras come in all sizes and types (view the products individually on-line by clicking on the left hand side of the page “Security Cameras” then “Hidden Security Cameras” or “Wireless Hidden Cameras” or “Hidden Camera Systems.”

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Wireless Security Camera with Recorder

Written By:
Wednesday, October 6th, 2010

A wireless security camera with recorder can be your answer to an easy to install and easy to operate security device. Technological advancements in electronic components and computer development have made a wireless security camera with recorder a reliable security device that is reasonably priced to fit just about any budget. Use more than one wireless camera with a recorder and you can create your own total coverage wireless security system.

Digital video security systems are becoming extremely popular these days for business use as well as in the home. In addition, there are so many features and/or options available that these systems can be placed just about anywhere for any application.

In this article, we’ll briefly describe a standard digital video security camera system and then elaborate on the differences between it and a wireless security camera system. Finally, we’ll list some of the features and/or options that are available for a wireless security camera with recorder.

A standard digital video security camera with recorder system is a component system that consists of one to many cameras, a Digital Video Recorder or DVR, and a monitor. The system operates with the camera “capturing” digital video and sending it to the DVR (which normally includes a processor as well). The processor creates a digital video file which is stored on the DVR and can be viewed immediately (live) or at a later convenient time.

The standard digital video camera contains one of two sensor chips that convert light energy into measurable electrical energy that can be used to create a video image. The lenses focus the field of view of the camera on these sensors. The chips are the Charged Coupled Device or CCD and the Complimentary Metal Oxide Semiconductor or CMOS.

After the sensor chips have created electrical data that can be used to create a digital video file, they send this data to the DVR and processor via a video transmission cable, usually an RG-59 coaxial cable. Each camera must be connected to a separate cable that is run from the camera to the DVR/processor. The processor than performs the necessary work required to convert the electrical data into a digital video file.

The processor is much like the processor in a personal computer, however security camera systems processors are highly specialized processors that are made to perform specific tasks necessary for digital video security systems. One important task of the processor is to reduce the size of the incredibly large digital video file without sacrificing the quality of the video. It does this by using a COmpression/DECompression or CODEC utility. Once the processor creates the digital video file it can be viewed on a monitor or stored on the DVR for archiving or to be viewed at a later time.

A wireless security camera with recorder system is operates in basically the same manner. The major difference with this system is that the wireless security camera does not use a coaxial video transmission cable to send the video data to the recorder. Instead, it converts the data into radio signals and sends the data as a radio wave to a receiver which is connected to the recorder.

There are a few variations on how the camera prepares and sends its wireless data. The most common method is for the camera to have an on-board transmitter and antenna that transmits a radio signal to a corresponding receiver. Many different radio frequencies and technologies are used, but the most common is the 2.4 or 5.8 GHz band technology. This is the same sort of wireless technology used on land based wireless telephones. Once the receiver accepts the signal it passes it on to the DVR/processor via a wired connection.

Another type of wireless camera is the Internet Protocol ready or IP ready wireless camera. This camera has its own web server technology that allows it to be connected directly to the internet. It normally connects wirelessly to the internet by sending its signals to your broadband wireless modem or router. The recorder can be connected anywhere there is internet access.

There are many features/options available for a wireless security camera with recorder. Here is a partial list:

  • • Indoor/outdoor cameras
  • • Day/night/infrared vision cameras
  • • Pan-Tilt-Zoom (PTZ) cameras
  • • Audio recording
  • • Battery (rechargeable) powered cameras
  • • Hidden/disguised covert surveillance cameras

This should give you some basic information about how a wireless security camera with recorder works and some the optional features that are available.

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Quality Outdoor Security Cameras

Written By:
Tuesday, July 13th, 2010

There’s nothing like a security and surveillance system with quality outdoor security cameras. A good quality camera is rugged and well protected from the elements, yet sensitive enough in function to produce a video image with only the slightest amount of light. Quality outdoor security cameras need to be maintenance free as well, since these cameras are often mounted high atop poles, buildings or other difficult to reach locations.

Outdoor security cameras are built with a protective case or enclosure that protects the camera from various types of debris and other matter. This is necessary because these cameras are often mounted in open locations that expose them to heavy winds, rain, snow, and dirt and dust. High quality outdoor security cameras are normally rated according to the protection the camera is afforded by the covering using an International Electrical code standard. The standard provides criteria for a rating called an Ingress Protection code or rating.

The ingress protection code is designated by the letters IP followed by two digits. The first digit corresponds to dry matter objects; the larger the number the smaller the matter that is prevented from entering the camera. The second digit corresponds to liquid. Quality outdoor security cameras should be IP rated and their rating should be at least an IP66 or IP67. Both ratings’ first digit (the numeral “6”) indicates that the camera is dust tight; no dust can enter the camera. An outdoor camera with an IP66 rating can also withstand powerful jets of water from any direction. An outdoor camera with an IP67 rating can also withstand being submerged in water up to one meter in depth.

When purchasing quality outdoor security cameras another key component to consider is the image sensing chip. Not all chips are made alike so it is important that your camera uses a quality manufacturer’s sensor chip. There are two different types of sensor chips. Both are electrical circuits that contain material that is sensitive to light. When the lens focuses the light image on the chip, the chip is able to convert the light energy into electrical energy which can then create a digital picture.

The two types of sensor chips are called either a Charged Coupled Device or CCD or a Complimentary Metal Oxide Semiconductor. Each of these sensors works a little differently but both still produce the same result; a digital video image. Not only should you look for sensor chips built by quality manufacturers but the size of the chip can be important too. CCDs and CMOSs normally range in size from about ¼ inch to up to 1 inch or more. Generally the larger the size of the chip the larger the size of the video produced and the greater the resolution or clarity.

Probably one of the most popular quality sensor chips used in many quality outdoor security cameras is the Sony 1/3 inch Super HAD II CCD. This is not the only quality sensor ship available of course, but it is very popular. This chip produces video resolution of at least 420 TV lines and is capable of producing video with up to 600 TV lines of resolution. This chip is also used in night vision infrared cameras as well.

Another characteristic to look for in quality outdoor security cameras is called the signal to noise ratio. It is normally written in the cameras specifications as “S/N.” The higher this number is, the clearer the picture produced by the camera. A good quality camera will have a minimum S/N ratio of 48dB, although there are cameras that have rations as high as 60 dB or higher.

High quality outdoor security cameras should also be accompanied with good quality service and support. Look for camera vendors that offer free technical support for installation and setup of your cameras. In addition, vendors should service the products that they sell.

Finally, quality outdoor security cameras should be rugged enough to last for years once they are mounted and installed and really should require no maintenance. However, look for cameras that have good, comprehensive warranties. A good warranty for an outdoor digital video camera will cover a period of at least 1 year but better warranties will offer 3 years of coverage.

Remember when shopping for your quality outdoor security camera that there are several characteristics of the cameras to look for and the cameras should come with service and support. A good quality outdoor security camera will provide you with years of satisfying service.

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