stands for Video Graphics Array and provides a 640x820 screen resolution.

learn more… | top users | synonyms

0
votes
0answers
11 views

how to derive VGA timing parameters from screen resolution?

I have a TFT panel, i want to interface it with SSD1963 TFT controller. I just know the resolution of screen. And even i got the standard settings for that resolution. But i want to know is there a ...
-1
votes
0answers
18 views

HDMI Output to VGA Input [migrated]

I have a computer with only an HDMI output and a monitor with only a VGA input. I would like to have the computer extend its display onto the monitor. However, I have read that VGA outs cannot be ...
0
votes
0answers
24 views

Problem with a VGA to HDMI converter [migrated]

I was wondering if someone could help me here, as I have close to no background on video systems. I have an issue connecting a game console (Dreamcast) to a VGA to HDMI converter and then to my TV. ...
1
vote
1answer
58 views

VESA CVT Standard - How to calculate video timings?

Most video resolutions like VGA (640x480), UXGA (1600x1200) or HD720 (1280x720) are defined by VESAs Coordinated Video Timing (CVT) standard. (It can be freely downloaded from VESA.org). The download ...
1
vote
0answers
65 views

LVDS Display to HDMI/VGA GPU interfacing and EDID compatibility

I am trying to build a display configuration board with USB 2.0 Interface. The goal of this application is to have the possibility of configuring all display parameters by PC software. The USB ...
0
votes
2answers
99 views

How does a PC detects a VGA monitor?

Currently I am trying to connect my LCD to my laptop through a VGA connector. The LCD has 6 wires out of it which I am trying to solder to a VGA male connector, But the laptop doesn't detect the LCD. ...
0
votes
3answers
349 views

Can reading VGA signals from my computer harm the hardware?

I was really hoping to be able to get (or make) a Y type VGA cable with two outputs and one input. The input would be coming from my desktops graphics card (specifically an R9 270). One output would ...
1
vote
1answer
130 views

How exactly does a VGA cable work?

I've been looking around on the internet and I can't find anything in depth on how the cable/connection functions. I've only been able to find simple pin out descriptions. If someone can link me or ...
2
votes
1answer
104 views

Reverse-engineering VGA

I got a x86-based firewall, produced by Stonesoft. It has serial interface, but it would be easier to install new operating system if I would get VGA output from the device. I discovered promising ...
1
vote
0answers
265 views

Convert SOG to VGA using LM1881

I need to convert RGsB (aka SOG or Sync On Green) to VGA. I've built the circuit as shown below: The circuit works but the output picture looks quite striped, something like this image: Any ...
0
votes
1answer
45 views

TFT LCD panel product no.FH12A-40S-0.5SH(55) (Or Psp 1001 screen) to Xbox VGA

I received a broken PlayStation Portable the other day and decided to try and use the 4.3 LCD screen in a custom Xbox 360 console. Here is the .PDF for the panel. Page 6 and 7 contain the pin-out for ...
1
vote
0answers
256 views

How to calculate EMI filter (ferrite bead) specs for digital signal?

I have a small project of mine that deals with plain old VGA output (d-sub). In my project I'm using a CM2009 IC between actual VGA controller and VGA output connector. It's mentioned in the datasheet ...
3
votes
3answers
960 views

VGA signal timing calculation using MCU

I want to generate VGA signal with microcontroller. But I have hard time finding solution online how to generate them in software. For e.g. Usually all online VGA signal generation just explains ...
0
votes
1answer
452 views

Solid color display on VGA not working

I'm trying to get VGA working on my Altera DE0 board using Verilog, but haven't had much luck. It has the same pins as a normal VGA interface except red, green, and blue are all 4 bits each. Here is ...
1
vote
2answers
332 views

How VGA monitor detects video resolution?

How VGA monitor detects video resolution. I'm asking this because with different VSYNC, HSYNC intervals it's possible to have different dot clock.
0
votes
0answers
70 views

Problem in connecting a VGA socket to a LED projector

I am building a mini LED projector. I have obtained the following parts from an old and used projector: 1) RGB LED box: 2) Himax signal processing card: Now, I want to connect a VGA port to ...
5
votes
1answer
374 views

having distorted image in VGA with FPGA board

I'm using spartan 3E-100 CP132 fpga board to display a basic plus image on a monitor. I have tried using 800x600 72 hz and 640x480 60 Hz but I always get a distorted vertical lines. Is it because the ...
0
votes
1answer
470 views

generating 40 mhz clock from 50 MHz

In VHDL how can I get a clock frequency of 40 MHz if my onboard clock is 50 MHz. I know how to divide the frequency by integers but this case is dividing by 1.25. I am using this for VGA so I think ...
0
votes
1answer
259 views

generating 40 MHz clock from 50 MHz in VHDL [duplicate]

In VHDL how can I get a clock frequency of 40 MHz if my onboard clock is 50 MHz. I know how to divide the frequency by integers but this case is dividing by 1.25. I am using this for VGA so I think ...
1
vote
1answer
89 views

MPU accessing busy memory

I didn't know whether to place this question here or on stackoverflow, but I finally decided to post it here. I want to build a simple system that would be able to work with basic peripherals (UART, ...
0
votes
1answer
3k views

SCART to VGA adapter - green picture

I want to connect my DVD player which has a SCART output to a computer LCD monitor with VGA input. The DVD player supports the Progressive scan mode. It supports both PAL and NTSC. I've built this ...
3
votes
4answers
421 views

Is quality of VGA Horizontal and Vertical sync Pulse relevant to be able to display on sensitive projectors

I am currently trying to diagnose a VGA problem on hardware A. Hardware A has some trouble sending display to certain projectors (while it is able to send display on most LCD monitors). Hardware B ...
0
votes
2answers
1k views

VGA driver in VHDL displays only black

Goal & Data I am trying to make a VGA driver on a Spartan 6 (Embedded Micro Mojo board) to display something simple like the french flag on an LCD monitor, in 640x480 8 colors. I live in Europe ...
1
vote
1answer
154 views

VGA switch 3 in 1 out [closed]

My team and I are going on a software development competition in 1 week. We will demonstrate the software on multiple laptops, but we have only one projector. So we need to be quickly able to switch ...
0
votes
2answers
321 views

VGA repeater/extender circuit

Apparently noone ever needed anything like this on the internet because I was not able to find any example, so I hope this will become the reference question. I need to repeat a vga 800x600 signal up ...
4
votes
1answer
217 views

Can the DS1052E be used for reliable NTSC measurement?

I'm in the market for an oscilloscope. I've read that the infamous DS1052E from Rigol is a great beginner scope due to the price/performance. However, I know I have a lot to learn and simply don't ...
4
votes
1answer
437 views

How does a computer signal via VGA for the monitor to sleep [closed]

Could somebody please explain how a "modern" monitor is told to sleep. I need to know this for a VGA with blue connector, i.e. it has DDC. I've heard that the sync stops. If true, which sync? ...
6
votes
2answers
575 views

How to implement memory mapped IO

I am describing a system in VHDL. This system already contains a processor, a DDR SDRAM controller and a VGA controller. VGA reads pixels from SDRAM (already validated and proven in FPGA). Although ...
2
votes
0answers
241 views

Debugging VGA signal

I have tried to use my Open bench logic sniffer to capture data from a VGA output. I'm pretty sure I understand how the waveform should look, but I not getting consistent data. It feels very shaky to ...
1
vote
2answers
28k views

Soldering a VGA cable - number of wires doesn't match [closed]

I decided to open up a VGA cable which started to produce only red / blue / green colored image. I thought that inside I will find something like shown on this scheme: Instead I found that my VGA ...
6
votes
1answer
865 views

VGA Decoding - Dealing with tolerances

Update: The VGA Simulator is up and running. You can go simulate your own designs or just use the example file to see it working. I also wrote a blog post to help anyone get started using it for ...
-1
votes
1answer
199 views

How digital video is processed? [closed]

I'm not sure if I'm using the right words, but I would like to learn how digital video works. I have a book that explains how VGA works and how to implement it on FPGA. I would like to know what kind ...
-2
votes
1answer
983 views

Problem with warnings in Xilinx tools [closed]

I am interfacing a VGA monitor with Spartan 3e kit. I have a problem in the code and I'm getting many warnings, as shown below. Could anyone explain the warnings? ...
4
votes
1answer
5k views

Do-It-Myself KVM?

I have several computers (desktops) in different geographical locations that I want to access remotely. Commercial KVM-over-IP solutions that I found are expensive (more than 200 euros each) and the ...
1
vote
2answers
716 views

16 bit RGB to vga converter circuit

Can anyone please suggest a circuit to convert 16 bit TTL (3.3V) RGB signal to a VGA signal. I used a resistor network, it works but I think some active component is necessary for load matching ...
-1
votes
1answer
512 views

Read VGA pixel value from SRAM in VHDL

I'm using a SRAM in order to store a frame that I have to display on screen with the VGA interface. I need to read the pixel value from the SRAM and then send it to the VGA monitor. I have created a ...
-2
votes
1answer
134 views

I want to connect an HDMI mini out (on my tablet) to a VGA input in a 'smart room' that I teach in-how? [closed]

I want to connect my Asus tablet mimi HDMI to a VGA in a 'smart room' that I teach in. Can I do this so I can show art work, play you tube videos, and recorded music and PDF's on the big screen in the ...
-3
votes
1answer
153 views

displaying JPEG images [closed]

I want to display images(JPEG) stored in a SD card, I want the output to be VGA so that I can display them in readily available display modules. Any idea on how this can be done?
4
votes
1answer
935 views

Is there an FPGA based vector graphics card project?

I have been messing around with VGA projects as my latest interest. I have a Xilinx Spartan 3E 250K FPGA, which has just barely too little RAM for a full 640x480 frame buffer. So, I'm looking at ...
3
votes
4answers
235 views

Video Controller Design

I'm designing my own computer based on the Zilog Z80. It has 256KiB of static RAM with paging as well as a few megabytes of flash memory. Everything is going along pretty well until * BAM * I hit a ...
-5
votes
1answer
143 views

Need for a VGA output [closed]

My device must be able to show a simple diagram on a screen of an ordinary computer monitor. I've found display drivers which could do the job, but they seem to be much more sophisticated than I would ...
6
votes
2answers
601 views

Trouble with VGA Controller on CPLD

What I am attempting to do is create a VGA controller from a Lattice MachXO CPLD in Verilog. The Problem I am attempting to display the color red with a resolution of 640x480 @ 60Hz using a 25.175 ...
0
votes
3answers
721 views

Vhdl VGA Problem

I'm doing a fpga project in vhdl for my studies. I'm displaying a dog on the screen that I try to move. That works well for right, left and up but trying to make the dog go down, it moves in a ...
3
votes
2answers
328 views

What impedances do graphics cards expect on H-Sync and V-Sync for VGA monitors?

I have a graphics card for a laptop whose driver kills itself if it runs for longer than two minutes with no external monitor attached. To solve that, I decided to make a sort of dummy plug that would ...
6
votes
3answers
3k views

VGA interfacing with PIC

I'm looking for a way to control a VGA screen with a PIC. External components are OK, so a VGA chip with I2C or SPI or something is okay too. Requirements: Resolution: max 1024x768, no minimum ...
5
votes
4answers
954 views

Can we attach LED to VGA port and make it light up, the same way we do in Parallel Port?

I just connected an LED to a parallel port in my PC and controlled it successfully through inpout32.dll I was wondering, if it was possible to do the same with the VGA port. Where can I find ...
3
votes
2answers
438 views

Custom VGA output : what resolutions are expected to work?

I am thinking of creating a device which displays graphics and animation to generic computer display with 16:9 aspect ratio via analog interface (D-sub). The question is which resolutions are ...
2
votes
2answers
1k views

male-male VGA cable wiring

I need to build a VGA cable (assemble connectors to wire). I need a male-male cable. Is its wiring straight or cross? (should i connect 1-1,2-2,... or something else) Thanks
6
votes
2answers
376 views

Does VGA have to be drawn at 60hz?

I'm wanting to generate a VGA signal hopefully as painlessly as possible. I have an odd question though. Everywhere I see that VGA requires a 25MHz clock for the sync signals. Is it possible to ...
2
votes
1answer
2k views

image distortion generating VGA signal on STM32 f4 using DMA

I'm trying to build a video generator using the STM32f4 (168MHz, using discovery board) + R ladder DAC to the VGA signal. The idea is not to be based on a framebuffer (this would limit the resolution ...