There our many different items that you can purchase with hidden cameras already built right in. And many Items around your home that you yourself can turn into a wireless hidden surveillance camera. The places in your home to employ them are as varied as the Items you may choose to hide them in. The first thing you should know is what type of camera is used.
The type of camera used is called a Board Camera. Board Cameras are basically a fixed lens mounted on a circuit board. These cameras are often used in dome cameras and for making hidden cameras but are also sold unpackaged, for mounting by the buyer. Lenses in these cameras are either of a full opened lens or pinhole, in which the opening of the lens is very small. Pinhole lens cameras are often called "spy" cameras and are most often used in making hidden cameras.
Hidden cameras are examples of hidden board cameras. Lenses in board cameras are pre-mounted and have a fixed iris. In most cases they have a short focal length (the distance between the surface of the lens and its focal point) which results in a wide-angle of view. Because board cameras have so many fixed features they are limited to what they can be used for. However, they offer a low cost solution to security needs, especially hidden camera situations. The world's smallest (3/4'' x 3/4'') video camera.
<em><strong>The camera technology used in Hidden Cameras is either CCD, which stands for (Charge-Coupled Device), or CMOS, (Complementary Metal Oxide Semiconductor). These are the image sensors.</strong></em>
<strong>CCD</strong> cameras produce a higher quality picture mainly because the image sensor is used strictly for collecting the image and all the other necessary processing that it takes to deliver the image to the video output of the camera is handled by other components on the camera board.
With a <strong>CMOS</strong> camera the image sensor is not only used to collect the image, but it's also used to process the image. This means the camera is slower at doing what cameras do "Collecting light and converting it to a useable image". The same chip that is used to collect the light is also used to do the necessary processing that it takes to deliver the image to the video output. Naturally the process is slower and the image that it produces is of lesser quality. However, it also takes less power to run a CMOS camera. Less components to feed = less power to run, which means it will run longer when powered by a battery.
CMOS technology has made some great advances in the last five years, and with the high-resolution CMOS cameras now available, we finally have CMOS technology that almost matches CCD quality at half the size.
By now you should have a good idea of the differences between these two technologies and be informed to the point of being able to pick which one would better serve your needs.
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