I know Apple has a DVI to ADC adapter / Power supply. I know of (and own) the Dr Bott's DVIator for connecting a computer with DVI out to an ADC monitor. The problem is, they only support digital signals, which means you cannot use them to connect a more modern computer to the best of all ADC monitors, the 17" Studio Display CRT!
That CRT expects an analog signal, and both Apples adapter, and Dr. Bott's only support DVI with a digital signal.
However, I found people who have worked on holding this problem before, as well as a user on Reddit who claimed to have used one of these solutions to connect VGA / DVI to his ADC CRT. This is the adapter in question: https://www.jasondoesitall.com/adc/
No work on it recently, but I figured the ADC pinouts haven't changed, nor have USB, VGA, or DVI. So I ordered a 3 pack of PCBs off Oshpark (https://oshpark.com/shared_projects/tUQ9np4l), the ADC connectors (search for "(CPC) DV3R035N11" on https://www.surplussales.com/Connectors/Video-Data.html), and then the VGA, DVI, microUSB, and DC power connectors off of Mouser (cart: https://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=40B2BB6866)
You need a handful of other parts, although I think the only other required component is a 1k resistor. All the other resistors, diode, capacitor, and LEDs seem to be optional.
Anyway, I finally got all the parts and PCBs in and soldered everything in place. I plugged into my 24v power supply, connected the ADC connector to one of my LCD Cinema displays that I don't care much about (just in case I've done something horribly wrong and it seemed to be working. The LCD's power button lit up, the ADC, VGA, and USB lights lit up when I plugged the DVI output of my TiBook into it, and ran a microUSB cable to the TiBook. When I power on the TiBook, the screen on the laptop turned on ,as did the Cinema Display (success!!!). Sadly, a few seconds after this, the laptop shuts off without warning. It does this every time I try to boot. I get a brief gray screen, and then the laptop powers off. I tried similarly with a Quicksilver PowerMac G4 (which has an ADC connector, but I used the DVI out. After a brief boot, the machine shuts down.
I did some digging into ADC pinouts (https://developer.apple.com/library...doc/uid/TP40002012-CH207-DontLinkElementID_21) to see if there were any problems with my soldering. I only found one issue, and it appears to be a problem with the PCB. On the PCB, pin 15 on the DVI connector was connected to pin 56 in the DVI connector. Whereas on Apple's specs, pin 15 for DVI is supposed to be connected to ground.
So, I was hopeful that was the issue, I cut the trace between pins 15 and 6, and ran a bodge wire from pin 15 to ground. Plugged in my board, lights looked good, but I still have the same behavior - brief moment of an image, followed by nothing.
I did plug it into my 17" Studio CRT to see if the behavior was different, and it was - it would not even turn on the CRT. Maybe my 24v power supply is too week, or maybe there's another issue.
So, that's where I am at. Is anyone else interested in trying to figure this out and providing others with a working solution to use those old ADC displays that we all have lying around? I'm afraid I'm at the end of what I can thing to try, so someone with more of a background in this might be able to help me know what to try next. Any help would be greatly appreciated. And once we have a working solution, I'll gladly put all the info together here so it will live on if JasonDoesItAll's blog goes away, or the Apple page gets removed.
Also, because I didn't want to short anything out while testing my 24v 4A device, I made a modified, 3d printable altoids tin like container to house it and keep my bodge wire safe. https://www.thingiverse.com/thing:5526854
That CRT expects an analog signal, and both Apples adapter, and Dr. Bott's only support DVI with a digital signal.
However, I found people who have worked on holding this problem before, as well as a user on Reddit who claimed to have used one of these solutions to connect VGA / DVI to his ADC CRT. This is the adapter in question: https://www.jasondoesitall.com/adc/
No work on it recently, but I figured the ADC pinouts haven't changed, nor have USB, VGA, or DVI. So I ordered a 3 pack of PCBs off Oshpark (https://oshpark.com/shared_projects/tUQ9np4l), the ADC connectors (search for "(CPC) DV3R035N11" on https://www.surplussales.com/Connectors/Video-Data.html), and then the VGA, DVI, microUSB, and DC power connectors off of Mouser (cart: https://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=40B2BB6866)
You need a handful of other parts, although I think the only other required component is a 1k resistor. All the other resistors, diode, capacitor, and LEDs seem to be optional.
Anyway, I finally got all the parts and PCBs in and soldered everything in place. I plugged into my 24v power supply, connected the ADC connector to one of my LCD Cinema displays that I don't care much about (just in case I've done something horribly wrong and it seemed to be working. The LCD's power button lit up, the ADC, VGA, and USB lights lit up when I plugged the DVI output of my TiBook into it, and ran a microUSB cable to the TiBook. When I power on the TiBook, the screen on the laptop turned on ,as did the Cinema Display (success!!!). Sadly, a few seconds after this, the laptop shuts off without warning. It does this every time I try to boot. I get a brief gray screen, and then the laptop powers off. I tried similarly with a Quicksilver PowerMac G4 (which has an ADC connector, but I used the DVI out. After a brief boot, the machine shuts down.
I did some digging into ADC pinouts (https://developer.apple.com/library...doc/uid/TP40002012-CH207-DontLinkElementID_21) to see if there were any problems with my soldering. I only found one issue, and it appears to be a problem with the PCB. On the PCB, pin 15 on the DVI connector was connected to pin 56 in the DVI connector. Whereas on Apple's specs, pin 15 for DVI is supposed to be connected to ground.
So, I was hopeful that was the issue, I cut the trace between pins 15 and 6, and ran a bodge wire from pin 15 to ground. Plugged in my board, lights looked good, but I still have the same behavior - brief moment of an image, followed by nothing.
I did plug it into my 17" Studio CRT to see if the behavior was different, and it was - it would not even turn on the CRT. Maybe my 24v power supply is too week, or maybe there's another issue.
So, that's where I am at. Is anyone else interested in trying to figure this out and providing others with a working solution to use those old ADC displays that we all have lying around? I'm afraid I'm at the end of what I can thing to try, so someone with more of a background in this might be able to help me know what to try next. Any help would be greatly appreciated. And once we have a working solution, I'll gladly put all the info together here so it will live on if JasonDoesItAll's blog goes away, or the Apple page gets removed.
Also, because I didn't want to short anything out while testing my 24v 4A device, I made a modified, 3d printable altoids tin like container to house it and keep my bodge wire safe. https://www.thingiverse.com/thing:5526854
