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| DIY tablet computer, maybe. |
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| nrml:
Very nice indeed :thumbup:. |
| S. Heslop:
Thanks for the comments! I've been kinda delaying doing more on this as I try figure out what I even want to do with it. Plus I need to go get some coaxial DC connectors and the cars booked in the garage for tomorrow. Gonna give the PC part a miss for sure. I think the display really isn't very good. It's fine for what I need it for, but even as a proof of concept I don't think it'd prove much since it's such old technology. As a regular pen enabled display theres not much going for it as theres fairly cheap IPS pen enabled displays from China out now. And for the computer side of it the motherboard I've got is a few generations old and of a format that seems to have been ditched by the manufacturers. It seems like intels NUCs and equivalents really took off though and are still making gains. I've heard they're becoming popular in offices for their small size and low power consumption. Intel are also releasing the occasional gaming oriented NUCs with hefty price tags and heftier power consumptions but i'm not sure if that's going to last since they get middling reviews and are more of a gimmick or curiosity than anything serious. The obvious option would be to try get ahold of a somewhat modern laptop and borrow the internals from that. But again that won't prove much since whatever i'd make would be specific to that one laptop. I like the idea of standard motherboard sizes and connectors since it gives room to switch parts out, say if I start with an old and shoddy NUC to see if it'll work and then maybe save up to get the latest greatest thing. As for displays. There's all kinds of stupidly high resolution IPS displays about now. I'm still taking a look through them to see whats available in spares. eDP has really caught on and theres a bunch of guys making way more compact controller boards for them. I think it's more of a pass through for regular displayport with a few extra bits for lighting the backlight, and while that kind of stuff is well beyond me but they openly post their designs to copy. Then the digitizer boards from older displays easily disconnect from the display itself, and perhaps if I can find one that matches the display size or is a little oversized then it'll fit behind a modern display just fine. Either way I think the next thing will be making that 3d printer. Rapid prototyping is what they were designed for! |
| S. Heslop:
https://www.dfrobot.com/product-1728.html Looks like this thing is set to release next month. It seems pretty good with built in eDP. Can't find actual board dimensions yet, but seems like something to keep an eye on. Edit: Dimensions are 79x115mm I've also had no luck so far finding an affordable modern and relatively large IPS display with eDP. There might be a better way to serch for them, but i'm mostly trying to find various laptops and tablets that use them and looking up spares specific to those to then find the actual panel number from. However the 9.7 inch ipad 3 & 4 displays are extremely available and relatively cheap. I guess because they sold so many there's skips full of broken ones to pull spares from. And this digitizer I already have is about the right size to match, being just slightly bigger. Could be a good way to assemble a more portable tablet. |
| S. Heslop:
Back to reality for a bit. Had a hard time sleeping last night so with the car in the garage I kept myself moving so I wouldn't calcify, and got a bunch done. Made a stand and stuck that screen protector on. Went for a more upright stand (60 degrees) since it leads to a more comfortable posture than hunching over the thing. I put some rubber feet on the stand and with the weight of the device it doesnt move at all. I also had it apart to drill holes for the two connectors at the top and... what a chore. If I thought a bit ahead I would've realised I could just put the connectors in the base and save myself having to drill some large holes in sheet steel with an incredibly fast but low torque drill and the wrong kinds of bits. No matter what I tried I couldn't get all the dust off. I think just the act of wiping the screen was statically charging it and every speck and shard in the area flew onto where i'd wiped. This image also shows how the screen protector blurs the image a bit, but in a way that hides the pixels and gives it a cool look. Messed around with the display settings a bunch and it vastly improved the image. The camera of course doesn't pick it up well but by default the greys were appearing extremely blue. Not as blue as in some of the photos though - I just forgot to hit the white balance. I'm also surprised that laptop can handle Krita's ~fancy brushes~. They give me a bit of trouble on my desktop if I go wild trying to fill an image with a complicated smudging brush so I didn't think the laptop would handle them at all, let alone as well as it does. It also tucks neatly under the stand. This wasn't by design but i'm glad it fits! I also cut apart an old test glove I had sitting on the desk to make one of those goofy tablet gloves. I thought they were for pedantic people that didn't want to get grease on their display, but it turns out it really helps stop your hand from chattering along the display surface. So i'm back to feeling pretty pleased with how this is turning out. At some point I need to try program the arduino microcontroller to emulate keyboard shortcuts. It's soldered up but I don't know if it even still works. It was playing up last time I tried using it to mesure a potentiometer. |
| S. Heslop:
Boy i'm no good at scripting. What i've managed to create is a very dangerous USB device that when plugged in immediately starts hammering undo as fast as possible. I think i'm going to have to try disable the shortcut so I can actually reprogram the board. |
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