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Mac DB15 Video to MiniDP

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In the spirit of BMOW's new ADB-USB converter (https://68kmla.org/forums/index.php?/topic/30470-retro-usb-input-converter-for-keyboards-and-mice/) and Themk's follow-up thread about an ADB keyboard-mouse switch (https://68kmla.org/forums/index.php?/topic/30475-adb-keyboard-and-mouse-switch/), I just wanted to throw out there that one nice peripheral to have would be a Mac DB15 video to mini DisplayPort converter. I have a DP KVM that I'd love to hook my Quadra 840av to if I had the ADB-USB and video converter.

 

I'm guessing it would have to be externally powered, seeing as how similar devices, like StarTech's VGA to HDMI converter (https://www.startech.com/AV/Converters/Video/VGA-to-HDMI-Portable-Adapter-Converter-USB-Audio-Power-1080p~VGA2HDU), borrow USB power, which obviously is not available on Macs of that vintage.

 

Any enterprising souls looking for a new project?   ;D

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Well, it ain't easy or cheap:

1/ DB-15 to VGA (easy to find but you probably already have one lying around)

2/ VGA to HDMI  (http://www.ebay.com/itm/VGA-Male-To-HDMI-Output-1080P-HD-Audio-TV-AV-HDTV-Video-Cable-Converter-Adapter-/132117262653)

3/ HDMI to MiniDP (https://www.startech.com/AV/Converters/Video/hdmi-displayport-converter-4k~HD2DP)

 

Grab a usb wall adapter (http://www.ebay.com/itm/5V-2100mA-Universal-Home-Wall-AC-to-2-Port-USB-Adapter-Charger-Black/371342134195) and you're good to go...

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I could figure out how to stuff all of those in a box, with a common power connector. That's about all I could do in this department.

 

How those adaptors handle the interesting HSYNC and VSYNC frequencies of some/most mac resolutions? I couldn't tell you, but I wouldn't expect much there. The sync signals are pretty hostile to modern LCDs and such.

 

By the way video switching is a planned feature for my ADB switching box, making it a true KVM switch. This doesn't solve your analog->digital problem, as it will be analog switching, but it would allow you to use multiple macs with one monitor.

Edited by Themk

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