Today we will tell you about how network cable Category 5 CAT5 makes a VGA cable compatible with most monitors using a standard 15-pin VGA connector. Since the CAT5 cable consists of only 8 wires twisted into 4 pairs, to ensure the passage of the VGA signal (15 lines are needed) it is necessary to use two cables at once. It should be recalled here that for a VGA cable there are restrictions on its maximum length- no more than 15 meters. For long distances it is necessary to use special electronic repeaters.
Instructions
1. Warm up the soldering iron and place it on the special holder.
2. Cut two pieces of Category 5 network cable, long enough to connect the remote monitor (no more than 15 meters). Leave some room for free connection without tension. Strip the ends of the two pieces of cable from the braid on both sides. Be careful not to damage the copper strands of the wires with the knife.
3. Disconnect all twisted pairs of wires at the ends of the cables. Expose the end of each individual wire by 2-3 mm so that the soldering iron has access to the copper core. In total you will have 32 wire ends ready for soldering.
4. Attach a 15-pin solderable D-sub connector (you will need to buy 2 of these) in a special bracket or mini vise. Turn it towards you with open contacts for soldering.
5. Insert the first of the prepared conductors into the center of the copper contact of the connector, heat the joint with a soldering iron, drop a little flux and, pressing a piece of solder to the contact point, wait until it melts and flows into the center of the copper contact. Remove the soldering iron and continue to hold the wire in contact until the solder hardens. Check the connection quality.
6. Repeat the described procedure for all conductors of the first and second cable. Draw the order of the connected wires according to the color markings and cable number. Cover the connector with the plastic cap.
7. Fix the second connector in a vice and solder the ends of the cables on the second side to it according to the diagram drawn up earlier. For proper operation VGA cable, you must strictly observe the order of the wires on both sides.
8. Wrap both category 5 network cables used in the production of the VGA cord together with electrical tape in several places. That's all, you can check the cable's operation.
Warnings
Many manufacturers use Cat 5 network cables to produce long-length industrial VGA cables. At the same time, they use other, more reliable methods of connecting conductors to connectors.
Remember to take safety precautions when soldering. Avoid inhaling flux and solder fumes, and remember that the soldering iron is very hot and may cause a fire.
VGA pinout. The VGA monitor connector is currently the most famous and popular monitor interface, which was developed by IBM more than thirty years ago. But even despite this, the VGA video standard can be found installed on most modern computer equipment. Especially on computers where it is necessary to display video in a simplified graphic mode, with a resolution of 640x480.
Absolutely all graphics cards produced in the world are compatible with this mode. The process of outputting high-resolution video information occurs exclusively after the drivers are loaded graphics adapter during operating system startup.
VGA pinout wires according to their color coding is very helpful in some cases, for example: When performing independent testing of conductors for breaks or, if necessary, increasing the length of the wire. Note: The industry produces VGA cables with a length of about thirty meters.
A fifteen-pin VGA connector, the design of which is a trapezoid shape with pins arranged in a three-row pattern, each row having five pins. To ensure correct connection of complementary connectors, the contacts in the block are installed in an asymmetrical order. Such a device, due to its shape, guarantees correct connection cable. The numbering sequence of the output contacts should be designated as shown in the picture below:
VGA pinout according to color coding
Mini VGA connector pinout
You will need
- Internet, very old video card with support for TV-out over d-sub, d-sub m connector, rca connector, coaxial cable 75 Ohm soldering accessories
Instructions
On the Internet you will find a ready-made vga tulip connector, but unfortunately, even if you buy it, it will not work. To transmit a composite signal from a computer, it is necessary to support this type signal standard. Until 2000, video cards with support for TV-out over d-sub were produced. That is, indeed, you could use a vga tulip TV adapter for such a video card. However, after 2000, the signal transmission standard was changed, and video cards no longer transmitted a composite signal. Thus, if you make a vga tulip adapter or buy a ready-made one and try to use it on a modern video card, the adapter will not work under any circumstances.
If you still need to output the signal from the vga output of a modern video card through the composite input to the TV (yellow video tulip), then the only way to do this is to purchase a special converter device. It recodes the signal between various standards. The cost of this converter varies from 10 to 20 US dollars. This is a rather complex device, so only a professional can assemble it independently.
If you are the happy owner of an ancient video card (manufactured before 2000) that supports TV-out over d-sub, for example from Matrox, you can try making a vga tulip adapter yourself. To do this, you need a wiring diagram for the rca and d-sub connectors or “pinout”.
Prepare vga connectors and tulip for soldering. Open the protective case, apply flux to the required contact pads in accordance with the pinout. Take a piece of cable of the required length, strip the ends, and tin them.
Be sure to slide the connector housings onto the cable before soldering it to the connectors. Solder the inner core of the cable to the center pad of the tulip connector and to pin number 3 of the vga connector. Solder the cable shield conductor (braid) to the other pin of the tulip connector and to pin number 8 of the vga connector on the other side of the cable.
Assemble the connectors at both ends of the cable. The adapter is ready. You can try connecting your TV to your computer.
Video on the topic
Please note
Pay special attention to setting the signal format, resolution and dehertz. Start with the lowest values. The TV may not recognize the video signal with most combinations of these settings, so try different options.
The easiest way to connect a TV to a computer is a video card with a separate TV-out, tulip or s-video.
You can also use a converter.
Perhaps another way to connect your computer to your TV will suit you, for example:
- connection with a vga vga cable, if the TV has a vga input. Some modern models TVs are equipped with a special adapter for connecting vga;
- connection via vga s-video adapter. This connection is possible on some video card models ATI Radeon, for example, series 3000 and special setting video card drivers. The TV must also have an s-video input;
- connection via vga YPbPr adapter. The same as in the previous paragraph, but the TV must have a YPbPr component input (three non-yellow tulips);
- connection via vga SCART adapter. The same as in the previous paragraph, but the TV must have a SCART input (comb).
Sources:
- adapter from vga to tulip buy
Those who own a significant amount of audio and video equipment are faced with a choice: make it yourself or purchase an adapter from the store that will convert the signals different types. Needless to say, factory devices cost a lot, but you can often do without them. And within the article we will talk about how to make a VGA to RCA adapter. Frequently asked questions will also be answered.
What is a VGA RCA adapter
The circuit of this device may seem complicated, but only until you understand it. What is this device? This is an adapter from tulips (RCA connectors) of analog video output to VGA D-Sub for 15 pins. The device discussed here can be used to connect a DVD player or satellite tuner to a multimedia projector. Of course, provided that it is not possible to work directly using the same type of cable, which is usually common in cheap or outdated devices.
What is the idea?
How to implement such an idea? You need a computer cable (twisted pair type CAT5/CAT5e) designed to transmit video signals. We will use it because the transmission is carried out over a distance of fifty meters without loss of quality.
First, we need to acquire three RCA connectors and one D-Sub15 pin (this is a plug), as well as a twisted pair cable. The last part is better to use shielded STP than UTP. But this one is more difficult to get, which affects the price. Therefore, the issue of possibilities and desires is considered here. There is no particular difference between the elements, but there is one nuance: it is better to use UTP if the cable length is less than 10 meters. If the distance is greater, then it would still be better to find STP.
Pinout
How to pinout a 15 pin D-Sub connector? The numbers go from left to right:
1 - R-Y (Pr).
2 - Y.
3 - B-Y (Pb).
4 - Ground - Brown.
5 - Ground - Wht\Brown.
6 - Ground R-Y (Pr) - Wht\Red.
7 - Ground Y - Wht\Green.
8 - Ground B-Y (Pb) - Wht\Blue.
9 - Not needed.
10 - Ground.
11 - Not needed.
12 - DDC DAT.
13 - Horizontal Synchronization.
14 - Vertical Synchronization.
15 - DDC Clock.
For the VGA RCA adapter cable we need six pins out of the fifteen presented. How to properly wire connectors and contacts? Check out this picture and you will understand how and what to do.
So let's see what happened. If everything was soldered correctly, then you now have an adapter that can supply a video signal to VGA D-Sub on the 15 pins of the projector. You can see approximately what the final product should look like in the photographs presented in the article.
Examination
Wire pairs with RCA plugs soldered at the ends can be usefully compressed with heat shrink to obtain greater rigidity. In general, now you can connect the result of your work and enjoy it (if everything was soldered together as needed). Paired wires, at the ends of which RCA plugs are attached, can be crimped with heat shrink to obtain greater rigidity.
In this case, we used a satellite tuner with a 3 RCA component video output as a signal source and a Sanyo multimedia projector, which did not have a separate video input of the same type. If on at the moment There is no way to verify the functionality of the resulting adapter, you can only carefully inspect the entire structure and make sure that there were no omissions, and everything is soldered as indicated in the article.
What you need to understand
You should be aware that the adapter in question can ensure the operation and full functioning of a device that has a VGA video input only if it can automatically detect the type of incoming video signal. An indicator of this will be the ability to select the mode in which data will be transmitted to RGB/YPbPr. Usage will be positively impacted by sending these types of signals. Why is this so?
The fact is that RGB and HV.sync (as, for example, the data coming from the video card output personal computer) is converted to RGB, which has a sync pulse in the green channel (Y). It, in turn, turns into the color-difference YPbPr. And as a result, we can conclude that these signals are not the same thing, although they can convey the same information. Therefore, carefully study what a VGA RCA adapter looks like.
Frequently Asked Questions
Based on the data presented in the article, it can be assumed that readers have some questions. However, this is not the first time such a topic has been raised, so such information can be found without difficulty. We found out how to make a VGA RCA adapter with your own hands. Now let's look at its possible improvements.
What adapters can be made using twisted pair?
- VGA extenders are special cables that have D-Sub 15 pin connectors on both ends, while their input and output use the same technology.
- RCA (3xRCA) is used to transmit component video signals. There are three connectors at each end. Used when working with DVD player and TV.
- RCA (D-Sub15pin) was discussed a little higher. Here are the components Y, Pr, Pb in VGA.
- To transmit analog audio, two pairs of stereo signals can be used simultaneously (4 RCA connectors at each end).
Why is a free Brown-Brown/Wht pair needed?
It can be used to transmit mono audio from a DVD player when there is an audio input on a multimedia projector (assuming it has speakers). Otherwise, it would be better to cut this pair and insulate it. Therefore, you should carefully consider the aspects and how the VGA RCA adapter will be used.
How can I make a Scart VGA adapter?
If the video source has a full Scart video output, then such a device can be made without problems. To do this, pinout the contacts is carried out as follows (outputs first):
- 7 - blue;
- 11 - green;
- 15 - red.
Now the ground:
- 5 - blue;
- 9 - green;
- 13 - red.
Otherwise, everything is done as previously described in the article.
Conclusion
Any final words? Carefully study the presented drawings and mentally imagine in detail what and how you will do. During work, exercise extreme caution and attentiveness - after all, if you miss the grounding, the consequences will be quite sad and very negative. The result is not VGA RCA for equipment, but the need to buy a new device for video playback. But if everything works out, then connecting a computer, projector, TV and many other devices will not be a problem now. The main thing is to make sure that all the pins are connected to the required outputs, and no incidents will happen.
But at the same time, we can raise the question of the profitability of assembling this adapter. The fact is that you can buy it for 100-150 rubles, which is not a high price. Time spent creating an adapter on your own will end up costing more in the long run. The only acceptable option is if everything is already there, and you just need to make this device. From a purely amateur point of view, such experience can be valuable if one has an eye on work closely related to the restoration and creation of similar devices in the future.
