VGA is a ubiquitous video signal. It is found on many projectors and computers. It stands for Video Graphics array (that doesn’t explain much, lol).
VGA is a video-only signal (hence the name). Unfortunately, VGA is slightly outdated due to HDMI (High-Definition Multimedia Interface), but it is still very widely used since it provides great signal strength. IBM unveiled it as a new analog graphics array in 1987.
On the other hand, a VGA Cable is a device used to link the computer to the monitor or television and transfer video signals.
The VGA cable comes in two types: male and female. It is a high-quality cable with three rows of 15 pins (male) that go into the three rows of 15 holes on it (female).
It has two screws by the left and right of the head to hold it in when plugged in.
Uses
The earliest VGA cables were made in the industry around 1987. Through many iterations and minor revisions by various makers in successive years, the format quickly became one of the most common forms of computer cables.
Today, VGA cables and sockets are still used on many Personal Computers, Televisions, laptops, and monitors.
You might need an adaptor to plug the VGA into your laptop, but you may not need an adaptor to plug it into the TV.
So you basically plug it into your system, screw the nuts in, and then plug the other end into your TV or projector (as the case may be).
Be careful when plugging it in because the pins could bend and damage the VGA cable.
Anyway, each VGA cable pin plays a different role when transferring signals. Pins 1 to 3 are for the video’s red, green, and blue aspects, and pins 4 to 15 are for the more technical parts of the video.
Choosing a VGA Cable
There is no exact means of measuring the quality of a VGA cable. But when a cable of good quality is acquired, the result is a clearer video (with a higher resolution).
The length of the wires also doesn’t make a huge difference when choosing a VGA cable.
Taking Care of Your VGA Cable
Also, although it doesn’t affect it so much, it is advisable to plug and unplug VGA cables when the devices are turned off.
Eventually, hot-swapping it (swapping it when devices are still on) is dangerous.
It can cause a serious power surge that can burn up either the device giving the video signal or the device receiving it.
As for every other cable, a VGA cable should not be rolled around too taut.
It can unnecessarily stretch or break the cable and damage it, causing it to either give bad video signals or none at all.
The following are the ways you can know a VGA cable is damaged:
- Either Red, Green, or Blue could be missing from your video.
- There could be no output at all.
- There could be a loss in brightness or contrast.
- It could ghost some characters in the video (Rare).
