Digital Electronics Featured Article

Eye of the Digital Camcorder

Anytime we use an invention, we typically think of the instrument as one unit. The best example is when we buy computer, washing machine or a car, we do not consider the various components, whether large or small, which comprise the machine.  Generally we use the machine while it functions properly, and when it stops to do that, we usually contact a repair person.  

Nevertheless, learning about how various devices operate, including the digital camcorder can be beneficial. This will permit us to better understand required repairs, and can even improve our own operation of the device. 

While several various components result in a digital camcorder’s operation, the lens remains one of the most significant ones. Just think of the lens of the digital camcorder as its eye and without this “eye,” the machine could not record any images.  

To begin with, adjusting the camcorder’s lens will allow it to record a crisp picture. Focusing the lens requires moving it so it correctly shoots the light beams originating from the object being shot, onto the change-coupled device. The device is an instrument used to sense images. This role resembles the ability of some film cameras to shift the lens forward and backward, in order to focus the light. 

Another element found in the digital camcorder that resembles some film cameras it the auto focus feature. Typically, it consists of an infrared light beam, which the human eye cannot see. How well does it work? Usually the beam reflects off the item in the middle of the frame and then returns to a sensor located on the digital camcorder. 

The auto focus component typically functions adequately. Although in special situations, you may want to switch to manual focusing. This includes the instances when your target is to focus on an item located in the frame’s side, rather than in its center. 

Ridiculously like a film camera in yet another way, a digital camcorder also contains a zoom lens. An optical zoom consists of one lens piece that lets you to switch from a specific magnification, to a greater one. The vast majority of camcorders include a motor that is attached to the device. This motor allows one to switch control on the handle, to change the zoom. Accordingly, zooming becomes simpler to conduct, and smoother. 

A digital camcorder can also contain a digital zoom. Instead of involving the lens of the camera, this device zooms in on a portion of the total image that the change-coupled device trapped, enlarging the pixels. A pixel is the smallest region on an electronic screen, which can include a particular color. 

While a digital camera includes numerous parts, the lens is one of the most notable ones. Without the lens, it would be blind. Use these tips to make dealing with a digital camcorder a lot easier. 

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February 28, 2008

How Can Digital Beat Analog?

I studied computer engineering in the late 80s. Though digital electronics had been around for a long time, it still retained some novelty.
As budding engineers we were in a dilemma: Why was digital electronics considered so cool and why was analog electronics considered seriously yesterday?
Of course there was no doubt in our mind that digital was the way to go, but the question still remained: Why?
Was it not true that in analog transmission, you could transmit any value, while in digital transmission, it was typically about binary transmission. And binary transmission means a bunch of zeros and ones. What could be the fun in that?
For instance in analog transmission, if I wanted to transmit the number 254, I would simply send it as 3 digits, a two and a five and a four. But in digital, specifically binary transmission, it would have to be 8 digits, i.e. 11111110, i.e., a series of seven ones and then followed by one zero.

I have been talking about binary transmission when talking about digital, because they are not the same thing. Binary transmission is just one type of digital transmission. There can be many others. For instance there can be trinary, which […]

Full Article At: KnowHow-Now.com Articles

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November 14, 2007

How Does VoIP Service Work?

VoIP technology is a one way of sending a voice signal also known as an analog signal in a medium which is digital, i.e, the internet. In practice, the process works like this when you have a standard analog telephone attached to your high speed internet connection with VoIP service. There will be an analog telephone adapter or ATA between the phone and the computer.
In order to place what would normally be a long distance call to a person who doesn’t have VoIP service you key in the number you want. The analog telephone adapter converts the touch tones into a digital format. The digital phone number is sent by the analog telephone adapter to the VoIP routing system at the service provider’s location. The VoIP service provider is located on the internet as well.
The VoIP service provider’s routing system identifies the recipient’s location and sends the call to the Public Switched Telephone Network (PTSN) at that location. The phone rings at the other end and the conversation can begin. Each time you speak, the analog to digital converter in the analog telephone adapter changes the voice tones into packets of digital information that can be transmitted across the internet. […]

Full Article At: KnowHow-Now.com Articles

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