Questions tagged [vga]

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

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Schematic for TTGO VGA32 V1.2 by Lilygo

After recieving a couple of these boards to tinker with I have been searching online for some schematic. I have only found the following useful images: Block Diagrams with several pinouts described ...
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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 ...
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VGA video switching using TS5v522

I am trying to bring video card signal to switch to a single monitor. I was hoping to use the TS5v522c but am not having much success. Data sheet below. https://www.ti.com/lit/ds/symlink/ts5v522c.pdf#...
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VGA 15P D-Sub --> 2 row motherboard socket

I have a SuperMicro X9DRW-iF motherboard, whose female VGA video connector literally broke off the motherboard whilst I was pushing the video cable into the connector. OK, no worries -- I thought, I ...
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Present two images side by side on the VGA screen from FPGA

Im trying to get a clue how to present two images on the screen using VGA. I using Altera Cyclone 2 DE2 and VGA, I have already working vga sync driver for 640*480 res: ...
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How to convert arcade RGB video (2-5v p-p) to VGA (0-0.7v)?

I'm trying to convert arcade video signals (JAMMA) to VGA specifications. From what I've gathered, arcade video signals aren't standardized. They can range from 0v-2v or 0v-5v, etc. However, VGA ...
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Vivado Video IPs not working as expected

I've been trying to understand how to utilize AXI-Stream IPs for Video processing and display via VGA for a few days now, but can't seem to get any circuit to work. Here is a test circuit I created: ...
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Debugging FPGA VGA connection

I want to display images on the screen and to do this I used this git and this article as references. The specs of my screen are 1280x1024, including porch pixels the dimensions are 1688x1066. From ...
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Troubleshooting FPGA VGA connection

I have DE1 Soc development board. I have been following this youtube video in order to start casting some stuff onto the screen. I am unable to display anything on the screen at the moment unless ...
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Designing a DVI/DP to VGA converter/converting 16bit bus to 8bit bus at 2x the frequency

as it turns out, new video cards no longer have analog video output. There are multiple converters available for sale, but I have not found one that can do higher resolution than 1080p at a refresh ...
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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 help in ...
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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 ...
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NTSC -> ADC -> USB. A video digitzer circuit

I'm working on a project that ultimately needs to incorporate an analog video camera input, digitizing it and spitting it out a USB port as an MPEG stream. My general aim is for roughly a VGA ...
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Package & Variable Gain Amplifier Identification

I am trying to identify an unknown wideband VGA whose markings were scratched off. It is apparently a 5W amplifier, drawing 1A @ 5V power supply, with analog gain control - using a 10k potentiometer. ...
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Help with VGA KVM switch

Hi for my work im triying to implement a VGA KVM switch to replace a manual switch that the production line workers use to switch between Quality control test, to replace that i tought about using a ...
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Routing Guidelines for Analog Video (VGA, RGsB, PAL)

I am currently into the design of the analog video IN/OUT. Basically I have a 3U PCB on which the encoder/decoder ICs are present, that converts the digital video to the analog RGsB (RGsB OUT) and PAL ...
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VGA DAC circuit

I have a PIC mcu which I am trying to drive a VGA monitor with.I am using a simple resistor DAC. I was trying to show a simple white screen but it only shows some shade of grey/black. I measured the ...
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Ribbon Connector And Custom Graphics Card

I understand how to make a homemade VGA connection using resistor ladders or ICs, like is done in this tutorial. http://dqydj.net/how-to-produce-640x480-vga-color-video-from-an-arduino/ Is there any ...
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4-bit parallel data bus using DMA and GPIO on STM32?

It's possible to generate 8 or 16-bit parallel output on an STM32 by using DMA to transfer from a buffer to the ODR register of a GPIO port, by transferring either a byte or a word at a time. However ...
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What do these labels mean in the context of VGA timings?

This is the image provided with the De1 SoC development board. I do not know what some of the abbreviations mean in this context VGA_R [7..0] values for red pixels VGA_G [7..0] values for ...
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Unable to use the VGA port correctly, De1 Soc distorts signal depending on the output pin

This is a followup to my previous question. The code I was using, pin assigmnets and the theoretical timings for VSYNC and HSYNCH were correct. I have used to oscilloscope to look at the signals, ...
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