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

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1answer
68 views

BeagleBone Black HDMI to VGA converter creating problem with the display

I recently bought a BBB and have started setting the initial environment before I start some actual developments. Since, my monitor has a VGA input, I bought a HDMI to VGA converter adapter to ...
0
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2answers
146 views

Building a VGA circuit

I am building an 8 bit VGA circuit and have 3 choices. One is to use a simple resistor network to convert digital to analog. The second is to use an op-amp. The third way to do this is to use a device ...
0
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1answer
45 views

FPGA VGA driver not working

I am not really sure what is wrong with my code bellow for a vga. All I want the program to do is display a solid color on the monitor. I want to use the switches on my card to change the color ...
1
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1answer
48 views

VGA levels, why are they wrong?

I read everywhere on the Internet that voltage levels in the color components of a VGA cable should go from 0 V (dark channel) to 0.7 V (maximum brightness for that channel). However I tried to ...
0
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1answer
17 views

FPGA(DE0 Nano) trying to connect with VGA but gets a Short Circuit

I am trying to connect my DE0 Nano FPGA to an display by using VGA. The output ports of the DE0 Nano have a voltage of 3.3, but the RGB Signals of the VGA want 0,7 V so I used a voltage divider. I ...
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6answers
236 views

What determines the number of pixels in front porch and back porch of VGA display?

Besides this, is pixel clock dependant on the VGA resolution and referesh rate or independant of them? What does one know what duration each pixel should have?
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1answer
35 views

Connect to external monitor using HDMI [closed]

I want to connect my laptop to external monitor, but it doesn't have VGA socket. It only has HDMI. I recently purchased a HDMI to VGA cable and tried with it, but still it doesn't recognize the ...
0
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0answers
69 views

Driving VGA from an controller

Currently I have 8 lines going out to a DAC which converts the digital values into analog ones for the display. However I want to increase the resolution of my VGA (more than 3 lines for red, green ...
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1answer
56 views

USB to VGA connector [closed]

What is the connections for a USB-VGA connector? Any resistor or capacitor needed? I couldn't not find any diagrams on the net.
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3answers
189 views

VGA controller using FIFO memory, discrete ICs and Arduino Uno/Mega?

I love the Arduino boards. They're super easy to use and give me access to fairly powerful microcontrollers for all of about $12. Unfortunately, 16MHz isn't quite fast enough to display more than ...
0
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1answer
41 views

VGA video filter and frequency requiered for this filter

I'm designing a VGA generator and I have found nice and cheap video filter (ADA4430-1) that goes after DAC. Its datasheet says that it has cutoff frequency around 10MHz. And that it is specially ...
1
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1answer
47 views

Testing Triple Differential Driver AD 8147

I'm working on project that requires me to convert my single ended RGB signal(VGA from PC) to differential ended RGB. I made this circuit given below the only change that I made was using a 4.7K ...
0
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1answer
96 views

Converting RGB composite output to VGA

We've got an old Arcade machine at work that we're busy converting to being powered by a PC running an emulator. The controls have now been sorted, and audio should be a breeze. Remaining is hooking ...
0
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1answer
34 views

What exactly is the need of Back and Front poch delays in VGA ,TF,LCD Timings?

I am trying to interface a 24 Bit TFT screen. But I am having a hard time understanding the need for Back and Front poch delays and how to calculate these ?
2
votes
1answer
409 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
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0answers
132 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
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2answers
159 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
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3answers
1k 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
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1answer
231 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
131 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 ...
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0answers
426 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
53 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 ...
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0answers
354 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
2k 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
715 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 ...
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2answers
565 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.
5
votes
1answer
421 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 ...
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1answer
618 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
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1answer
356 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
100 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
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2answers
5k 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
554 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 ...
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2answers
2k 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 ...
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1answer
189 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
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2answers
385 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 ...
5
votes
1answer
275 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
553 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
808 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
293 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
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2answers
39k 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
1k 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 ...
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votes
1answer
240 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
1k 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
6k 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
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2answers
899 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
616 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 ...
-3
votes
1answer
192 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
1k 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
282 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 ...
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votes
1answer
150 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 ...