DVI to VGA Conversion on a Budget
I didn't make this into an Instructable because my wife is visiting Minnesota and took the digital camera with her. If anyone wants to build this and photograph their process, just include me as a collaborator and I'll be happy... :)
I just acquired a new (used) video card for my Mac. Unfortunately, it has a ADC (Apple Display Connector) and a DVI (Digital Video Interface). While the card is capable of driving two displays, I only had a DVI-VGA adapter and ADC-VGA adapters run $50-100US! I decided that I'd just have to figure out how to wire my own adapter and run it to an unused PCI plate.
The following schematic is a DVI-VGA adapter. I've included the pins that would be used for the equivalent points on an ADC connector. I just finished wiring an ADC connector to a VGA connector on another plate. It works perfectly!
I hope this saves someone else a few bucks...
Vegas
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I am looking for DIY solution for DVI to TV - out convertor.
I want to connect my PC to TV with full screen out put without any loss.
please share the complete info about how to make DVI to Tv - out convertor at modi.sachin@gmail.com
Your help will be really appreciated.
this website details a full pinout for dvi-d to hdmi (they use the same format)
hope it helps
Composite: This signal is normally not available on a DVI connector. It would require a conversion circuit.
Component: Sorry, the data is not available for Component and would require a hardware converter.
RGAHV: Most TVs that accept Component will also accept RGB on the same terminals. You should be able to use the VGA adapter here, a VGA to BNC cable and 5 BNC to RCA addapters. Of course, you could always build your own cable. :)
VGA: Just use the given adapter.
HDMI: HDMI is pretty much the same as DVI-D with audio inlcluded. You can purchase a DVI to HDMI very inexpensively from your local Frys, Bestbuy or similar stores.
I was experimenting with this as I wanted to be able to turn off my PC monitor while having a 2nd display active. Windows doesn't allow independent power saving for displays, therefore I had to find a way of doing it as I didn't want my PC display on. It's the same when using a TV out on a graphics card, if the PC monitor goes into standby, the TV display goes black.
See the following page at the bottom.
http://www.epanorama.net/documents/pc/vga_bd15.html
For your Help I will try this..
GOD BLESS..
jun
Which pin i will going to Isolate from the D-SUB connector. 15 pins.
To be able to force to Blank the screen by using remote relay.. (Without damaging the Monitor).
I understand that i can put relay to power source of MOnitor to CUT OFF or FORCE to STOPPED. the monitor. But, this is not good for the unit.
So, my plan is to control only the signal. by d-SUB pins. One of 15 PINS.
My Question which one ?
Thanks a lot..
I have a monitor (FORMAC 2010) that has an ADC connector and i want to connect it to my PC who has a card with DVI and VGA !!!I just want the signal not the usb from the monitor!!!!is it possible to work just by connecting the pins from the ADC to a DVI male connector? The monitor also has an external power supply on the cable (15V ) so i believe that i don't have to connect the 25V of the connector!!!
I'd be greatful is someone could help me!!!!
Thanks a lot guys!!!!!
Think I saw somewhere scheme to get RGB signal from ADC connector on Apple computer and use it to give it to TV , just to use as second display if there is lack of the original ADC monitor. It's simple and just need to short the detection pins so the signal should be released.
Btw, how long have you been back LasVegas, I just kinda found my way out of the woods myself. I remember you just sorta..... disappeared
I only come back to respond to legitimate questions. Contributing just isn't worth it when other's can freely steal your material and call it their own and questions pertain to my psoriasis or my wife's less than teen-aged hands rather than the topic in question. When the kids are no longer in control, I'll contribute again.
Best wishes and regards
L
DVI-D port runs only digital signals
Component ports runs only analog signals
Read more aboute pinouts and ports here:
http://pinouts.ru/
BUT it is possible to wire
VGA port to Component port with home made adapter herw you are a scheme:
http://www.tkk.fi/Misc/Electronics/circuits/vga2tv/circuit.html
Thats why is theoretically possible to use the same adapter from the link above to wire :
DVI-I port(DVI-I, digital and analog) to a Component port(analog only), just have to wire dthe analog pins from the DVI-I adapter to those meant for the VGA port,
All of these are awaliable at:
http://pinouts.ru/search.php
but you have to read carefully..
I wish you good luck. ;)
I google digital composite and there is info on both analog and digital, so what am i missing?
Component (YPbPr) requires three analog signals consisting of Y (luma or brightness), Pb (Blue minus Luma) and Pr (Red minus Luma). Green is derived through the above three signals. Horizontal and Vertical signals are also sent through the Y signal in much the same way as Composite
RGB is simply the Red, Green and Blue analog signals. Horizontal and Vertical signals are usually sent separately through H and V lines but sometimes they're sent with the Green signal as Composite.
DVI-I and DVI-A always supply RGB-HV and cannot directly drive Component.
If your HD-TV has HDMI, you can easily adapt DVI-I or DVI-D since they are electrically compatible. At current prices, you would be best off, purchasing an adapter or cable.
If you're interested in building your own RGB/HV to Component Encoder, you can visit this site. There you will find schematics and kits.
Good-luck!
LasVegas
and hdmi to a converter box since it is converting it to analog?
Im doing a conversion of Apple Cinema Display 17" LCD with ADC port to a PC with DVI.. and separate power supply for the monitor
I red all your instructions and on many other sites
and I'm planning to do this:
pics.data.bg/zoom/albums/2777c7ffa4e0dfb59394539c82844cea
http://pics.data.bg/zoom/albums/2777c7ffa4e0dfb59394539c82844cea
As I see it, you are GURU and almost God in these tematics so I will ask some questions:
1. Where to connect 13pin(Soft Power) from the ADC connector( or what type of signal should I give to this pin so the monitor should start up, how to power up the monitor)
2. On the DVI connector-14 pin, there is 5volts that are supplied by the Video card, I dont see the logic to conect them to the 5 volts given by ADC-3pin?, you said that to one of the others before, but it seems not logical?
I tought to conect : Pin3 from ADC to pin 16 on DVI on the card, and LEAVE pin 14 on the DVI on the v.card NOT CONNECTED to nothing.
3. Why to connect pin11 from ADC to pin 15 of DVI. First is groud for 25v, second is ground for 5v from the external supply for the monitor it seems not logical too.
Can't I get the needet ground for pin15 of the DVI from pin 23 on ADC: it is grond for 5 volts ?
2 - Normally an LED supply line will be +5 volts at a relatively low current (probably less than 300mA). All it's used for on a monitor is to tell the monitor that a source is connected. Pin 3 is sufficient for the purpose.
3 - Any DC return is going to be connected to the same ground in the computer's power supply. The USB return is likely going to be through current limiting (500mA limit on USB) circuitry. It would probably be sufficient to use either though.
I have another idea, as I red from other forums ADC doesn't power until it is connected to original APPLEComputer and if is disconnected and reconnected to the ADC-DVI hacked cable with PC on it ,the monitor is still ON and the hack is OK until you power it down then the monitor can't be powered on again with the PC.
So the assumption is that :The ADC monitor is powering ON ,by software signal from the USB. I can get old USB Apple Keyboard with powering ON key on it ,that runs a separate circuit for this key and delivers it to the USB connector so it should supply the POWER ON SOFTWARE-signal and if I connect it on the ADC monitors USB hub connector the problem should be resolved.
-Some people tried to ground the 13 Soft Power signal from the ADC monitor results in - "no success".
-They tried also to gave 5 volts with resistor on the way , again -doesn't work.
thats why I asked you but it is still a problem ...
So there is no need to try it out again...
PS. There are no drivers for the located on the ADC monitor USB hub so there is no way to be recognized on the PC.
I think that the Soft Power- pin 13 on the ADC is to power the computer through a key / touch button on the monitor or so i will leave it unconnected.
When i tried it ALL I will write again.
I have got an apple display with ADC connector and a PC with DVI video card and I was looking forward to build an adapter on my own; did you manage to finish your? Do you have a working pinout?
I have got a keyboard to do the test you were describing so I'll probably give it a try as soon as I get some spare time.
Best
Apple's been wonderfully creative over the years with video I/O connectors. Sigh. Nearly as much fun as the RAM Stick Follies.
Welcome back!
I have found this pin layout apparently for a G5 ADC port but I'm assuming that all ADCs are the same http://developer.apple.com/documentation/Hardware/Developer_Notes/Macintosh_CPUs-G5/PowerMacG5/3Input-Output/chapter_4_section_12.html I have traced the pins and found out what you see on my last picture.
I believe I have pins 1,2,3,9,10,11,17,18,19,6,7 worked out since according to the diagram the have exact name match. My dilemma now is with 14,15,16,22,23,24 because I do not see a exact name match on the diagram and I am not sure how many of those are needed.
Do I make sense? :)