DVI to ADC Converter




This is my first instructable and although I have no experience whatsoever, I thought that it would be nice to contribute since I have been a frequent user for a long time. I decided about a month ago that a second or third screen would be a nice addition to my computer set up and started looking for something cheap. A few days later I saw on the trash an Apple screen of 17" with something that looked at first like a normal DVI connector, no power input and some USB inputs in the back, so I thought this is my lucky day!
Well, as many of you may know by now, my lack of knowledge was evident as soon as I tried to connect it to my PC and the type of adapter wasn't the same. After a few hours of research starting with basic "converters" I realized that the price range of one of those DVI-ADC was prohibited since it is cheaper to get a brand new screen for less than that.
At that point I was mad because I had a piece of junk in my tiny apartment and I had expend hours learning about the ADC Apple proprietary video connector for nothing.
Well, I did a little bit more of research and found that some people had gone through the same process of trying to make adapters under a budget and went deep enough to figure out tables and pin connections to the detail. However, after some inquiries it was evident that soldering a breadboard and wiring yourself ~30 wires may prove impractical in addition of electrically not recommended since you are going to suffer of noise and such in the near future. Nevertheless, I am thankful for the help of Tony  and another instructable, which guided me through the whole process.

the other sources of information came from:
Apple Documentation
Molex Connectors 1
Molex Connectors 2
USB info

The version 1.0 of the prototype is this:
 Connected all the pins indicated in the apple datasheet and put a mini AB USB connector (mostly because of the small size) as an interface with the PC. I salvaged a DVI and a ADC connector from an old broken video card and put them to use in my project (that is why they don't look brand new) but they work just fine. Set up the software to control the intensity (only in Windows) developed by some guy, who Tony describes better than me in his blog. After that, connected a DC power supply of 24VDC and at least 1.3Ampers for a monitor of 17" (bigger may require more power...amperes not voltage) and presto!

The details:
As you can see in the pictures the PCB is quite small and the most complicated part is the wiring since the pins of the connector are very close to each other and there are not PCB footprints for ADC connectors so I had to design my own. Although, I tried to be very careful making sure the pathways of the power were far from the others, I made a mistake with two wires from the USB that I had to correct breaking the pathways and rewiring them with two external cables. Not the best job ever but as a lesson "don't ever send a PCB layout at 3am". Other than that, the circuit is pretty much plug and play, solder the connectors, connect the cables, connect the power supply and you are good to go.

What is left:
Well, as you can see in the diagram, there is a softpower pin that I left disconnected but it doesn't seem to affect the operation, I have to do some research about it.
A VGA connector will be added in a future version so you can chose if the input is DVI or VGA
I don't know exactly where I am going to put it but the idea of the altoids box sounds good to me for now. Any idea guys?

I had all the connectors around, the only investment was the PCB, Which I had to order at least 4 units and took them more than 2 weeks to send them; each one was like $13. I saw the power adapter on Ebay for something like $11( this would do the trick). Keep in mind that every monitor has different power requirements and the specifications indicate that this adapter (the original apple) can't handle more than 96W (4 Amperes).

Have fun! Ah and let me know if someone is interested in the PCB's that I have left, I think I only need one or two, I am willing to send the other two if you cover the $13 plus shipping.



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    12 Discussions


    1 year ago

    hi.... i want buy this PCB & DVI & ADC port.pls help me

    1 reply

    Reply 1 year ago

    Managed to get both DVI and ADC connectors from http://www.surplussales.com/Connectors/Video-Data....

    Might as well pick up 2 of each, at that price. have a spare, in case you screw up something. and if the first one goes well, make a second adapter.

    As for the PCB... the connectors use a 1.9mm spacing, so it is pretty much a guarantee you will need a custom PCB.

    There are a few people who have made them, including this guy http://www.jasondoesitall.com/adc/ (who kindly allowed access to his gerber files), so you can have them made up at any board fab facility.

    Don't forget a power connector, usb ports, and a really good solder iron.


    4 years ago on Introduction

    Hi there, do you know if it's possible to create a more simple solution? I've seen alot of DVI to ADC converters online that seem to be aimed at connecting a DVI monitor to an ADC output on an old mac. They look like this

    Obviously this has a male ADC port where I'd need a female ADC to make DVI, but if this is just a simple cable, can the same be done to connect an ADC monitor to a DVI graphics card?


    4 years ago on Introduction


    Great work.

    I have two of these monitors that I wish to reuse rather than scrap. Any chance on supplying the artwork for the PCB? link or email. Thanking you. Best wishes, thready

    2 replies

    Reply 4 years ago on Introduction


    Sorry, this was a long time ago and I lost the PCBs for a HD failure in my old computer. Let me see if I can rescue a copy and send it your way, no promises though.



    Reply 4 years ago on Introduction

    i also be interessed if you find back the PCB draw file , cause i can easly get the PCB build in my work

    i plan to add a 12V dc 2 amps regulator to supply a little amplfier stereo for the CUBE speakers

    i have also a question about the 1Kohm resistor ,i found another diagramm where the is not this ressistor .

    what is the utility of them ?

    thank you very much




    5 years ago

    im need pcb


    do you still have one? i need just the circuit board, i have the adapter by myself.


    5 years ago on Introduction

    Interested to buy two of these!
    Where did you get to print these up for you?


    6 years ago on Introduction

    I made a similar board and included the VGA connector as well: http://www.jasondoesitall.com/adc/


    6 years ago on Introduction

    I'm also quite interested in reusing the old Apple displays. However I would like to make it a bit different so that the two connectors goes on the same side of the PCB. Is it possible that you can share the design / Geber files for the PCB?
    I will anyway try to purchase one of the PCB from Batchpcb, to try it out.


    6 years ago on Introduction

    Do you still have an extra PCB? I would be interested in purchasing it from you.