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Author Topic: UbiQ 3  (Read 117 times)
DaBotz
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« on: April 10, 2017, 12:11:41 PM »

I recently acquired yet another Intuos 2 12x18 (yeah - finally, one of those bargains that seem to happen only to others - 50 bucks with shipping).

Me being me, I looked around for a monitor to place over it, and I opted for the 19.5" LG 20MP48

It is a LED backlit IPS monitor, although not a high-resolution one (1440x900 ) and only has one VGA input (shopping for a third party controller? maybe, if push comes to shove)  

This monitor represents yet another move toward sparing material, on LG part... the back of the LCD panel also acts as back case of the whole monitor, and the tiny VGA adapter is hosted inside a cover attached to its bottom that also hold the - as usual, not removible -  stand pivot. It is kept by three screws on the back, nothing more.

More important for the ones like us, the front plastic frame is - too - already part of the panel, being THE front frame for the panel... removing it was simpler than I expected and already exposed the lcd an the flexible connectors from the TCON to the LCD, 3 of them that they are (I didn't expect it, so I started from that and I found myself with the LCD wanting to fall out  in a moment I had my hands otherwise occupied).

As I expected, though, the 30 pin - 1mm pitch - FFC connector between  the VGA and the TCOn is long maybe 10 cm (I doubt it), so sourcing a longer connector is in order, for me, before trying more stuff.

The LED strip is at the bottom of the screen (with the TCON board) and it is connected wih three individial cables of the same kind used in the LG IPS224v that I used in my last re-build, i.e half the number.

In all, if the EMI are of the order of the ones from its bigger brother, this build should be all but virtually done.

Given the very smal footprint of this monitor VGA, its reduced thickness , and the fact that I already have a void case lying around, I think that I will build this one inside the Intuos 2 case.

  

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« Last Edit: April 10, 2017, 12:23:58 PM by DaBotz » Logged

The most incredible artist of... Barbanza?
DaBotz
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« Reply #1 on: April 26, 2017, 10:29:33 PM »

Update: I acquired a new FFC with a connector, however I forgot to check and ordered a "same side" FFC, when the one needed was - really -  a flip-side. Nothing major - cut, then take a cutter's blade and scrape the plastic on the side that need to be uncovered.

Which was good and well, as the guy that sold it to me had placed the connector on a tip with the blue stripe - it was too thick to actually enter in the LCD panel receptacle.

So, dismount it, and glue on the other tip that I had cut (removing the blue strip) and scraped bare... It works, so who cares that it is not too elegant.  


I have prepared the bottom of the case, modded the screen and finally joined the Intuos 2 and the LG... and so I discovered that the Tcon-board is very "noisy"on the right side of the screen (about 1/3rd is lost to false clicks, pressure blots and crazy jitter).

I need to build a sizeable RF case for it, but I am still confident that the build can be done. ... by simply raysing the thing up a bit, the interferences fell very noticeably, to what I'd call normal levels.



How to count pins, the lazy way - take a photo and mark them out.


* 0D-00004 - Bongofish-DSC02467.JPG (134.57 KB. 1200x900 - viewed 4 times.)


To case or not to case... here an untouched Intuos 2 and the UBiQ in its current form... as you can see, the UBiQ has the same size, even if it has a 14 mm (1/2 inch) thick perimeter frame in plywood.

If it wasn't that I want to use this build on my laps, plywood would have probably served me better... renouncing the possibility to mount it in a board, the frame could go down to 7 mm... which would have made the build smaller than the original Intuos.  I may still build one, in the end...



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The most "tranquil" way to cut a thick sheet of metal... drill holes.



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« Last Edit: April 29, 2017, 05:48:21 PM by DaBotz » Logged

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DaBotz
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« Reply #2 on: April 26, 2017, 10:43:58 PM »

Checking where to place stuff, the safe way... paper cut and tape.


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Not forgetting some details...



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The final arrangement is good enough - in the end, I only had to add the grounding between the  intuos and LCD tcon_Board.



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« Last Edit: April 29, 2017, 05:51:42 PM by DaBotz » Logged

The most incredible artist of... Barbanza?
DaBotz
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« Reply #3 on: April 26, 2017, 10:50:18 PM »

Not really the Eureka moment that was the first build, but it's nice to have arrived here.[/i


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Alas, I soon realized that my toil wasn't over.

It seems that I really need to shield away the TCon board at the bottom... 

Then it will be time to measure stuff, cut some other, and buy a glass.

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DaBotz
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« Reply #4 on: April 29, 2017, 05:34:55 PM »

Built the full RF cage for the TCON-Board


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It looks very fine, and testing show that it reduces greatly the problems (though, less than tilting upward, and away from the Intuos antennas, the tft circuitry board!)


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This time, it sits just glued to the 0.5 mm acerylic shets that I use as "Intuos-protectors" (it worries me....).


The cage improves thing, but the panel is still much more recalcitrant than the IPS224v, and gives jitter, false clicks and pressure blots in the last four to five cm to the right, as well as a more "normal" jitter on the left two-three.

The LED strip is at the bottom, and heats a lot less than the one in the 224, being much less power over a wider space.


« Last Edit: April 29, 2017, 05:38:21 PM by DaBotz » Logged

The most incredible artist of... Barbanza?
DaBotz
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« Reply #5 on: April 29, 2017, 05:44:39 PM »

I have more and more doubts about my decision to keep the Intuos case...


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Sure, it looks much sleeker than my usual boxy plywood things, but it all feels so... flimsy!

I wonder if I would not have been better by re-using the "Ubiq 2" case, maybe modifying it to have less square corners....

Now, I have to wait till the glass shop opens, get the guy to cut me a glass that size, finding the right spacers, and look for a flexible gasket to close the hole all around the Intuos...


« Last Edit: April 29, 2017, 05:55:42 PM by DaBotz » Logged

The most incredible artist of... Barbanza?
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