VGA transmitter / receiver - Electronic Circuits Projects Diagrams Free

craigsut · 7th January 2007, 03:10 AM

Hi, I am new to electronics and am taking on a large project for a newbie.

I want to build a wireless VGA transmitter and receiver pair. I want to take the VGA signal coming out of the computer and transmit it via an RF signal to a receiver connected to either a Monitor or Projector. I am thinking that prehaps PIC's would need to be used. I would also like to make the power supply internal if at all possible.

I need help with this project and would appreciate any help and guidance provided.

Thank you in advance

hjames · 7th January 2007, 05:33 AM

If you look at the bandwidth numbers, it just won't work. Say you want to do 640x480, 60Hz, 24 bit color => 300K pixels * 3 bytes/pixel * 60 = ~60 Megabytes per second. That would be pushing gigabit ethernet, and is about 50 times greater that what you can do with 802.11.

Now, if you are willing to go analog, and do TV resolutions - then it's easy, but expect to have some pretty lousy quality...

The real solution that commercial products use is to have some complex and expensive encoding techniques that are nearly impossible to homebrew.

Sceadwian · 7th January 2007, 05:43 AM

It surely wouldn't be easy, but you should be able to stream MPEG2 (or 4) data over say a wi-fi connection. What exactly are you trying to do this for?

**Nigel Goodwin** · 7th January 2007, 11:01 AM

Certainly NOT a project for a beginner, and also unlikely to be legal anywhere in the remotely civilised world.

craigsut · 7th January 2007, 06:52 PM

Well I thank you all for the input and will have to just use a different method.

I was planning on installing a projector on a high ceiling and did not want to run a vga cable all the way, I will have to probably use a vga over cat5 solution.

Once again I thank you all for the input.

**Nigel Goodwin** · 7th January 2007, 06:58 PM

You might perhaps be interested that's there been some talk of the possibility of creating wireless HDMI for HDTV - this has similar problems to VGA really. Essentially you need VERY high bandwidth, so you need a VERY, VERY high carrier frequency - and available spectrum would have to allocated for it.

It's not going to happen tomorrow, assuming it ever does?.

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7th January 2007, 03:10 AM	#1
craigsut	VGA transmitter / receiver Hi, I am new to electronics and am taking on a large project for a newbie. I want to build a wireless VGA transmitter and receiver pair. I want to take the VGA signal coming out of the computer and transmit it via an RF signal to a receiver connected to either a Monitor or Projector. I am thinking that prehaps PIC's would need to be used. I would also like to make the power supply internal if at all possible. I need help with this project and would appreciate any help and guidance provided. Thank you in advance

7th January 2007, 05:33 AM	#2
hjames	If you look at the bandwidth numbers, it just won't work. Say you want to do 640x480, 60Hz, 24 bit color => 300K pixels * 3 bytes/pixel * 60 = ~60 Megabytes per second. That would be pushing gigabit ethernet, and is about 50 times greater that what you can do with 802.11. Now, if you are willing to go analog, and do TV resolutions - then it's easy, but expect to have some pretty lousy quality... The real solution that commercial products use is to have some complex and expensive encoding techniques that are nearly impossible to homebrew.

7th January 2007, 05:43 AM	#3
Sceadwian	It surely wouldn't be easy, but you should be able to stream MPEG2 (or 4) data over say a wi-fi connection. What exactly are you trying to do this for? __________________ "Because I be what I be. I would tell you what you want to know if I could, mum, but I be a cat, and no cat anywhere ever gave anyone a straight answer, har har."

7th January 2007, 11:01 AM	#4
Nigel Goodwin	Certainly NOT a project for a beginner, and also unlikely to be legal anywhere in the remotely civilised world. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk Last edited by Nigel Goodwin; 7th January 2007 at 11:18 AM.

7th January 2007, 06:52 PM	#5
craigsut	Well I thank you all for the input and will have to just use a different method. I was planning on installing a projector on a high ceiling and did not want to run a vga cable all the way, I will have to probably use a vga over cat5 solution. Once again I thank you all for the input.

7th January 2007, 06:58 PM	#6
Nigel Goodwin	You might perhaps be interested that's there been some talk of the possibility of creating wireless HDMI for HDTV - this has similar problems to VGA really. Essentially you need VERY high bandwidth, so you need a VERY, VERY high carrier frequency - and available spectrum would have to allocated for it. It's not going to happen tomorrow, assuming it ever does?. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk