Electronic Devices: How Webcams Work

Learn what webcams are and how webcams work. These cameras are easy and also fun to use to use and beneficial in many different ways.

Through perusing the internet I'm sure that you have come across many different types of webcams. Webcams have many different uses. They can be used to keep an eye on a baby sitter or to watch your home when you're on vacation. You can even set up a webcam for making video phone calls! Basically if you would like to monitor something, you can do it easily with a webcam.

You may be asking yourself what a webcam exactly does. Basically, a webcam is a digital camera that is connected to your computer using a USB port. The camera is designed to take digital photographs and broadcast them over the internet. Software, which usually comes with the webcam, grabs still images occasionally. The software turns the image into a JPG file and then uploads it to a web server. From there, the images can be placed on a web page.

This is the easiest way that a webcam works. To see the newest image, visitors must refresh the page on their own. This can be stopped by adding automatic refreshing to your page. A few ways to automatically refresh the page are to use a Meta tag, a JavaScript function or a Java applet.



The meta tag is html that can be added to the page. This tag reloads the page after a certain amount of time. You can set this time to be anything you would like. A Java applet will automatically refresh just the image and not the entire page. This can be beneficial if you have a page that generally takes a long time to load. Another option is to use JavaScript, which is a programming language, to automatically refresh your image.

If you do not want to host or maintain your own web site, some companies offer their services free of charge. These companies let you upload your images to their server for free. This can do away with some of the trouble that comes with maintaining a web site. To use their services all you need is the camera, some software that grabs the image and a relatively steady connection to the internet.

One problem with having your web cam hooked to your computer with a USB cord is that your cable length is limited. You may run into a problem if you want to monitor something that isn't in the same room as your computer. To solve this problem, you can purchase a camera that has an external video jack. There are two different options that you have if you use a camera with an external jack. One option is to run a video cable with an RCA jack from the cameras to the computer. I you want to steer clear of the cable; the other option is to use a radio link.

Now that you know how a webcam works, I'm sure you want to know what to look for in a good webcam. There are many webcams out on the market for reasonable prices. When looking for a good webcam you should consider price, good image quality and one that is easy to set up and use. These qualities should ensure that you find a webcam that you are happy.

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