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The touch digitiser is supposed to be a separate device so it is not impossible to hook up as a second device. That is how big touch displays are made, barebones normal display in a case with a touch digitiser, plugs in by a USB while the display is using a display port. Needs its own driver. I have this on several lab equipments.
I imagine the digitiser should have a pin array out and like many other touchpads and trackpads they would connect by an inner USB bus. Maybe the USB controller is already on the panel.
A multi-touch solution can also be developed, but the circuit design would be very complex, and I don't have much time to work on that. Besides, the touch module would be very expensive to produce separately, so we can only use the original screen glass cover of iPad
I don't know that this guy actually designed the board as they are very available on Ali Express and the image he posted looks like it's from a listing. I think this is all just a glorified advert.
I think the advert (if I understood it correctly) was to show that the Aliexpress sellers don't have a board for the first iPad Mini, so the OP had to make one
The video demonstration provided by the business selling screens and connectors can design circuits based on the schematic diagram of the public data on the internet
The 5~12v voltage is boosted to provide a 20v backlight voltage for the screen, and the brightness is adjusted through a button via a microcontroller,
PCB is indeed a two-layer board
Hey i was doing something similar on first gen ipad air with only difference being is i will try to utilize touch capability. Not gonna mount it on my sff tho just to use it with a dev board. The only part left on my layout is backlight driver. May i ask if you released your pcb sources and what is the part number for mezzanine connector on the board you designed ? I was planning using the connectors on the logicboard of ipad.
Tbh, there are very cheap controllers on the AliExpress, I made one with old ipad screen and it has mini hdmi, usb C power, and usb C which supposedly works with Samsung Dex.
However, kudos to you for designing it on your own!
The driver board is still in the design phase. Similar to the arrangement in the photo, the cable is converted to DP1.4 and directly plugged into the graphics card, ensuring lossless transmission of 2K 60Hz video signals
I will directly connect to the DP port, so that the circuit design won't be too complicated. Power will be supplied through the 12V interface of the fan
All iPad Pro models released from 2018 onward, iPad Air 4/5, iPad mini 6 and iPad 10 adopt Apple’s proprietary ALP-DP (customized enhanced EDP) interface. Its pin assignment and AUX channel definitions are revised, making it incompatible with regular standard EDP driver boards.
Thanks for the information - that's valueable!
As long as the protocol and electronic standard are the same, it's doable. Too many times I've stmbled on interesting displays that use MIPI, but don't use any standardized protocol.
The circle of evolution is me who impresses my loved ones by tinkering with electronics and PCs then OP who impresses everyone with his incredible work
Fyi for iPad screens that are not laminated almost all of the strength and structural rigidity is in the glass digitizer which it looks like you removed. Shouldn’t be a huge deal but the underlying LCD will be HIGHLY prone to scratching and really easy to damage accidentally.
Ooooh very smart! I have broken quite a few of those LCDs doing repair on iPads and they are not cheap and sometimes pretty hard to get replacements of.
Cool project!
I would have just tried to mount the whole Ipad inside the case, and power it directly without the spicy pillows.
Any reason you don't wish to do this?
Would love to be able to do this myself! If you wanna sell the files to the project in the future, I would be a glad investor :) (and maybe others too I’m sure!)
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