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 1 
 on: September 21, 2017, 11:45:49 PM 
Started by jedikalimero - Last post by jedikalimero
As I wrote on Drewid's topic:
One more thing. This digitizer contains two boards and flat flex to connect them.
You show active board (lot of chips) but not passive board (antennas). Flat cables shouldn't cause problems, but connectors at both ends may.

I'm not sure but in case there was any problem with the connectors for the sensor array, I think the detection of the pen would be erratic, being detected in some areas but not in others. But in my case, the pen is not detected anywhere.

 2 
 on: September 15, 2017, 07:34:58 AM 
Started by lzhets - Last post by Amiisato
I have benefited from your information a lot.

 3 
 on: September 15, 2017, 07:34:38 AM 
Started by Ertew - Last post by Amiisato
I'm sure your message is very good. Get a lot of benefits.

 4 
 on: September 07, 2017, 10:28:33 PM 
Started by ThinWhiteDuke - Last post by ThinWhiteDuke
Hey, thanks for the kind words Aerendraca. For me there's not much to be embarrassed about (outside of my exceptionally poor soldering skills), it's not perfect but I wasn't aiming for it to be production model beautiful. But the places where I felt it could be better can inform people who may take on a similar project. It's light, it's semi-presentable so it works for me. I found a 9v wallwart to take the place of the heavier laptop-like power supply that came with the controller board it seems to work fine.

The one thing that I'd really like to do (and I have the parts to do it) is to group all the wires. Right now the wires span the entire tablet, power on one side, usb on the other, hdmi in the middle. Some day I intend to fit a mini-usb male to micro usb female converter along with a right angle converter, I also have an 360 hdmi extension and will group all the wires in a black mesh cord wrap to keep them better organized and away from hanging about all over the place. It just hasn't been a priority since I can doodle on my laptop at the moment.

I don't know how I would evolve the project outside of making it look nicer here and there, but I'm doubtful of that happening. It was never a huge priority. It seems to be as thin as I could get it, maybe not as light as I could get it since I spackled it, but it's still light. The only things off the top of my head that I can think of that would make a functional difference would be cutting the ribbon cables and resoldering them so that they're the proper length and not all folded, this could allow it to be thinner. (But it's too much trouble for me). Another would be to make the hump in the back (where the controller is stored) out of thin wood. It would again, allow it to be thinner, but I'm unsure at what cost of weight.

 5 
 on: August 31, 2017, 09:28:41 PM 
Started by Drewid - Last post by Drewid
Well there you go. Good call. Smiley
Lower ribbon cable reseated.

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Super happy bunny Smiley


 6 
 on: August 25, 2017, 03:45:40 PM 
Started by jedikalimero - Last post by Ertew
As I wrote on Drewid's topic:
One more thing. This digitizer contains two boards and flat flex to connect them.
You show active board (lot of chips) but not passive board (antennas). Flat cables shouldn't cause problems, but connectors at both ends may.

 7 
 on: August 25, 2017, 03:40:09 PM 
Started by Drewid - Last post by Ertew
One more thing. This digitizer contains two boards and flat flex to connect them.
You show active board (lot of chips) but not passive board (antennas). Flat cables shouldn't cause problems, but connectors at both ends may.

 8 
 on: August 22, 2017, 11:25:12 AM 
Started by Aerendraca - Last post by Aerendraca
The other thing that took a while to do was labeling the wires. I used a multimeter to check continuity on each wire and used colour combinations of heatshrink to match them up.

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 9 
 on: August 22, 2017, 11:19:03 AM 
Started by Aerendraca - Last post by Aerendraca
SCSI cables are a great idea for LVDS! I hadn't even considered them. I may change some of the display electronics at some stage so I will definitely keep them in mind.

Interesting note on the FCC IDs DaBotz, that should make tracking down more detailed info on the tablets a bit easier.

UV is a fair point Ertew, it is a concern when you remove the filters from the OLEDs, and if I was planning on using the tablet in direct sunshine I would probably not have removed them. There is some protection in the system though. The glass offers protection against UVB and will inherently attenuate all of it, although about 75% UVA can pass through the glass. I estimate about 20% of the UVA that does make it through will be further attenuated by the polarizing material, optical adhesive, optical tape, and ITO coated film before it gets to the OLED modules, so I think the levels of UV would need to be quite high and for a sustained period to cause catastrophic damage.

I've reached the latest milestone. The OLEDs are all wired and tested working, and the Touch pads are wired, calibrated and also tested working. Latest image showing the 9 OLED modules each with a unique image:

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With initial testing now complete it is now time to move things onto the actual Sereitiq2 case. The wiring for this part I have already done though so it should just be a matter of spending some time removing the temporary grey wires and soldering the glass components to the new yellow wires.

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Incidently there are 16 yellow wires that run along the bottom edge of the case just beneath where the glass rests and each one was a fiddly pain to line up. The total width available for all of these wires to run was only 8mm! It required tweezers, double sided tape, and tons of patience.

 10 
 on: August 18, 2017, 07:57:06 AM 
Started by Drewid - Last post by Drewid
Thanks for the reply.

It's reasonably guess-able I think, the board layout is pretty logical so I know roughly where the problem is and could narrow it down further with just a tape measure.   I think I could get a hot air station fairly cheaply and I'm in no rush so can wait a few weeks for it to arrive from China if necessary.   It'd be a useful thing to have anyhow, it's a good excuse.   Smiley

I can be keeping an eye out for possible donor boards in the meantime.

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