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[MacTron]

DVI to HDMI works, but ADC to DVI + DVI to HDMI dont.

¿?

are you sure ?

   

Sorry I'm not folowing this thread, but I just want to notice that I'm using an ADC -> DVI and a DVI  -> HDMI adaptor in serial, so I have a HDMI monitor connected to a ADC video card without any hack or mod, without issues since half a year.

[Protools5LEGuy]

I got the ADC to DVI cable + the DVI to HDMI cable and that combo to my Samsung 32" TV do not work.

My ADC cable is like coachla but with the DVI black. It also can rotate 90 degrees.

While the same DVI to HDMI cable works thru the DVI port on my Samsung 32" TV. But the ADC to DVI works perfectly on my 1280x1024 19" TFT hanns-g brand monitor.

I mean, I could get dual display using an Gforce4 MX 32 but only if the  32" "HDMI to DVI" were conected to the DVI port and the ADC to DVI with the Hanns-G 19" driving thru DVI-D

[indibil]

Hi, this post has been sitting idle for several years, but I thought it was a good place to showcase the project I'm working on. I'll probably make a version 2 to improve some aspects, but I've designed a PCB to replace the graphics card's ADC with an HDMI port, adding a USB-C port specifically designed for Cube users.

I thought the best place to showcase this project is the OS9 forum, because this OS is limited to a few graphics cards with drivers, and most of them have ADCs. If you have OSX, there are better cards that no longer use ADCs.

I hope you like it.

https://rosysumenteinquieta.blogspot.com/2025/05/cambiar-el-adc-por-un-hdmi.html

[aBc]

While not everyone may share my personal disdain for ADC - if this innovation eliminates
the need for other hardware to easily achieve the currently, in vogue, HDMI connection…
well I say MUCHO kudos to indibil’s ever-constant and innovative efforts.

Thank you for again sharing, indibil!

Now where is that damned LIKE button!



And now, yet another LIKE for the post below!!!

[DieHard]

WTF... how can this be real ?  I just read the info and looked at the pics.

I am blown away !

You missed your calling indibil, Apple would have been lucky to have you... why are we so lucky... I'll never know. 

Please feel free to neuralink some of your grey matter to disk so that I can upload it into my brain when I pickup some of Elon's home studio products in 2026.

[indibil]

While not everyone may share my personal disdain for ADC - if this innovation eliminates
the need for other hardware to easily achieve the currently, in vogue, HDMI connection…
well I say MUCHO kudos to indibil’s ever-constant and innovative efforts.

Thank you for again sharing, indibil!

"like"

WTF... how can this be real ?  I just read the info and looked at the pics.
I am blown away !
You missed your calling indibil, Apple would have been lucky to have you... why are we so lucky... I'll never know. 
Please feel free to neuralink some of your grey matter to disk so that I can upload it into my brain when I pickup some of Elon's home studio products in 2026.

"like"

[indibil]

I've updated it, and it seems to be working fine now. I've even verified that it recognizes two monitors and allows for an extended desktop.

https://rosysumenteinquieta.blogspot.com/2025/05/cambiar-el-adc-por-un-hdmi.html

[Jacques]

Amazing work! Well done. Always so exciting to see some innovation for old hardware Will you make the schematic available or will you be making these for sale?

[aBc]

Have spent this morning trying to think of what to write in response to… this… yet another amazing innovation from indibil. But instead of just heaping more effusive praise upon this achievement… I first think more of all of those unused ADC cards out there that may now be easily transitioned to HDMI - thus, saving them from e-waste. (Not to mention all of the other expensive and convoluted solutions for HDMI - some, already covered here under this topic.)

THIS is really quite an achievement! AND he submitted / posted it here.

And no, this isn’t the first such innovation from indibil - nor shall it likely be the last (hopefully).

Some people are born tinkerers and unafraid to innovate… they’re more inclined to ask “why not” instead of “why bother”. And then they share their innovations freely with others. So what do we do in response? Keystroke, keystroke, keystroke… until words just become mere chitty-chat in what now can seemingly become just meaningless blabber over time.

No, indibil deserves much, much more for his efforts. Least of which, could be the return of the damned “Like” button. Because while it is “nice” to receive a bit of occasional written praise (and some will actually do that) it’s additionally supportive IF one’s efforts are recognized by such a minor thing as a simple “click”. A rather easy bit of added positive reinforcement that says thanks, your contribution is both recognized and appreciated. Instead of just posted… "into the void”.

So, I’m inclined to strongly agree with the “old” Bolkonskij…

I like the "like" :-D ...seriously, how often am I reading a post that contains helpful info but then I don't wanna spam the forums with "thanks, that was helpful" replies. Yet, I DO WANT to give something back to the person investing the time to share his/her knowledge. So I feel this is a great way of doing it.

On a sidenote - Functions like that have been there on Bulletin Boards before Facebook and the whole Social Media crap. Where do you think Zuckerberg got the "inspiration" from?

[Underline above is mine.]

Thank You indibil!

Why not, ehh? 
 

[Protools5LEGuy]

Ros, eres nuestro idolo !

[indibil]

Thanks for the positive feedback, but I'm far from being anyone's idol. Many of the things I do are based on trial and error. I don't have the technical knowledge from the start, and that leads me to waste components, a fact that pains me. Some ATI Rage Pros have fallen on the battlefield, and in recent weeks, some processors and cache chips have also fallen. I'm running out of stock

My intention is, once I've verified that everything works well, to make it available to the public, but what I'm not sure about is the method. I'm not convinced about publishing the GERBERs because anyone can profit from the design by manufacturing or selling it. I've considered publishing it on OSHpark, but ultimately, the platform is the one that manages the sales and makes the profit. And I don't have time to manufacture or assemble the PCBs. I have to think about how to offer it, because I didn't do it for my benefit; I did it so everyone could swap their ADCs for an HDMI.

I accept suggestions

[IIO]

Hi, this post has been sitting idle for several years, but I thought it was a good place to showcase the project I'm working on.

as they say... the best adapter is no adapter.

i can imagine that the one of other card has been lost in the process.

and is there anything which could stop you to do the same to the GF4MX?

[indibil]

Time.

The PCB should work on any graphics card with an ADC.

.
.
.
edit: accidentially edited the original post, then restored it from memory. -110

[indibil]

Hi, this post has been sitting idle for several years, but I thought it was a good place to showcase the project I'm working on.

as they say... the best adapter is no adapter.

i can imagine that the one of other card has been lost in the process.

and is there anything which could stop you to do the same to the GF4MX?

GeForce4MX working with the HDMI converter, after installing the NVidia 2002 drivers, rev3.2

[Protools5LEGuy]

Awesome.

[Protools5LEGuy]

Thanks for the positive feedback, but I'm far from being anyone's idol. Many of the things I do are based on trial and error. I don't have the technical knowledge from the start, and that leads me to waste components, a fact that pains me. Some ATI Rage Pros have fallen on the battlefield, and in recent weeks, some processors and cache chips have also fallen. I'm running out of stock

My intention is, once I've verified that everything works well, to make it available to the public, but what I'm not sure about is the method. I'm not convinced about publishing the GERBERs because anyone can profit from the design by manufacturing or selling it. I've considered publishing it on OSHpark, but ultimately, the platform is the one that manages the sales and makes the profit. And I don't have time to manufacture or assemble the PCBs. I have to think about how to offer it, because I didn't do it for my benefit; I did it so everyone could swap their ADCs for an HDMI.

I accept suggestions

Please calculate a price.that gives you. benefits and be. the manufacturer. No more than a dozen mods. a. Year I estimate.

Offer here your services for. continental. Europe.

You have done lots of mods on music  gear and. macs/computers

https://rosysumenteinquieta.blogspot.com/

https://rosysumenteinquieta.blogspot.com/2012/03/construccion-de-un-amplificador.html

https://rosysumenteinquieta.blogspot.com/2011/07/mi-tube-wah.html

https://rosysumenteinquieta.blogspot.com/2007/08/reparacion-de-un-procesador-g4-733mhz.html

[DieHard]

The PCB should work on any graphics card with an ADC.

Since ADC adapters are literally $200 on eBay in 2025, this adds some amazing un-tapped functionality to all these old video cards.  There are so many users that have given up on their trusty ADC monitors over the last 10 years, and this is the ticket to add dual screen ability back to those who transitioned to a large single screen LED and look at their "unused" ADC port as a dead appendage.

Awesome job !
 

[IIO]

The PCB should work on any graphics card with an ADC.

that´s what i wanted to hear.

the experience of people using ADC->DVI->HDMI adapters seem 50/50, in every other case it does not work because of either the monitor, the cable, or the adapters.

so your board could be the definitive answer for the general problem? what about making it an external adapter instead of soldering it to the card? (or is that a problem bc it requires power at a voltage not contained in the graphic interface?)

[indibil]

Thanks for the replies.

The truth is, I can't dedicate myself to manufacturing and selling. I don't have the time, and for it to be interesting, the price would have to be reasonable, and to be profitable, the price shouldn't be. This is something that should be done by oneself, but I need to think about the best distribution method.

So far, it's worked on all the graphics cards I've tested it on, but I should mention that depending on the resolutions supported by the monitor, the control panel displays different or different resolutions. It doesn't seem to communicate equally with all displays, but that may be due to the ADC protocol and not the adapter. In reality, the adapter doesn't convert anything or modify anything; it simply wires the ADC pins to the HDMI and USB pins. If any graphics card or monitor has problems with this adapter, I suppose it would have also had problems with another external adapter.

As for making an external adapter, that wasn't my initial idea. Besides, I wouldn't be able to get ADC connectors, and we would need +5V, which would have to be "snatched" from a USB port. If a Mac already has few USB ports, it's not a good idea to remove one for the adapter.

P.S. @diehard, changing the subject, do you happen to have a link to that OS9 image compatible with the 1GHz iMac G4? I haven't been able to find it.

[DieHard]

P.S. @diehard, changing the subject, do you happen to have a link to that OS9 image compatible with the 1GHz iMac G4? I haven't been able to find it.

I am kinda out of the "file" loop at this point, if you can't get any solutions from the powers that be, I'll search what I have on my backups