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Author Topic: Ultra Cheap Cintiq (Acer C300 Screen)  (Read 6481 times)
XDjackieXD
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« on: November 04, 2014, 08:35:14 PM »

Hello everyone!
A few months ago I bought myself a Intuos Pen S to start drawing a bit (still a total noob  Cheesy) and after a while I figured that the S is a bit to small because I constantly drew outside the active area.
In September I tried to draw on a friend's Surface Pro a really liked it to see what I draw under the pen  Smiley

Last weekend I picked up a Acer C300 for 30€ and disassembled it to get the LCD&digitizer assembly because the notebook itself was painfully slow...
Luckily I had a LVDS-controller at home (bought about a year ago for ~20€) and could start right away.

After measuring the cable which connects the mainboard to the lcd&wacom unit I had the following pinouts:

* Pinout_LVDS.jpg (378.45 KB. 600x1722 - viewed 617 times.)

* Pinout_Inverter.png (128.84 KB. 522x408 - viewed 555 times.)


Then I designed a little breakout board in Eagle (files in the attachment; just remove the .txt extension) so I could use the cable (because soldering those little wires is a hassle...):

* breakout.jpg (382.11 KB. 995x1279 - viewed 559 times.)

* breakout_assembled.jpg (368.65 KB. 1137x1355 - viewed 583 times.)


And after about 3 hours of work I had this:

* lcd_working.jpg (414.89 KB. 1594x1217 - viewed 614 times.)

yeah!

Although the viewing angle is really bad it is workable (the best angle is from the top which is good because I want to use it upside down so the cable is on the top):

* IMG_20141103_190027.jpg (438.47 KB. 1500x1125 - viewed 516 times.)

* IMG_20141103_190043.jpg (376.32 KB. 1500x1125 - viewed 589 times.)

* IMG_20141103_190050.jpg (365.86 KB. 1500x1125 - viewed 498 times.)


Finally I tested the digitizer using a USB<->TTL (3.3V) converter and got valid ISDV4 data.  Cool
Just waiting for my teensy2.0 clone now  Grin

BTW: I have one extra of the breakout boards which I would give away for free (if the shipping fees are below ~3€).

-Jakob

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Aerendraca
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« Reply #1 on: November 04, 2014, 10:09:38 PM »

Nice job! Looking forward to seeing how you get on with the teensy. Any plans for a case?
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bumhee34
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« Reply #2 on: November 05, 2014, 01:15:10 AM »

Wow... how did you measure the pin map?

And the breakout board looks very nice... I need to start to study Electronics.I envy your capability! Smiley
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XDjackieXD
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« Reply #3 on: November 05, 2014, 07:24:42 AM »

I measured the cable between mainboard and LCD&digitizer unit (wacom and lvds pinout known).

No plans about the case yet but I think I will keep the back cover because it is made out of metal and a good shielding.
For the front cover I was thinking about black acrylics and some touch wheels and buttons on the side (relatively easy using an atmega328 and vusb library).

At the moment I'm 17 years old and in the 3rd grade in a technical collage (HTL here in Austria).
I love electronics, computers and everything related (ham radio, ....)  Grin

-Jakob

Update: I managed to get the serial tablet to work (luckily the Linux-Wacom drivers still support the serial tablets) and I love it  Cheesy
Also I tried putting the glass of an old scanner above the screen because the glass of the laptop is a bit thin and gives artifacts on the screen when pressing a bit stronger and it works very well (the only problem is that the surface of the glass is much smoother than the surface of the original glass).

Anyone here who knows how to calibrate the pen-cursor offset on the edges of the screen in Ubuntu? It's not a big problem but a bit annoying...
« Last Edit: November 09, 2014, 12:38:16 PM by XDjackieXD » Logged
XDjackieXD
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« Reply #4 on: March 21, 2015, 08:39:10 PM »

I totally forgot to post the results here:


* IMG_20141121_211835.jpg (459.53 KB. 1500x1125 - viewed 603 times.)


* IMG_20141214_211900.jpg (312.95 KB. 1500x1125 - viewed 555 times.)


* IMG_20141214_211928.jpg (372.88 KB. 1200x1600 - viewed 562 times.)


I built a case using plywood, some aluminium L-profiles and a glass from a scanner.
I forgot to post it because I got a cintiq companion hybrid relatively cheap (600€ like new).

It's almost finished (just needs something other than cardboard for the electronics and I need to finish this: https://github.com/XDjackieXD/WaxWasp (I should move the discussions about it from a Help-thread to a new one...)).
 
-Jakob

« Last Edit: March 21, 2015, 08:41:55 PM by XDjackieXD » Logged
Aerendraca
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« Reply #5 on: March 21, 2015, 08:43:10 PM »

That looks like a pretty good job to me, beautiful! Do you ever use it now youth have a companion?
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XDjackieXD
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« Reply #6 on: March 21, 2015, 08:47:43 PM »

I used it regularly until I got the cintiq and now I only use it to develop WaxWasp  Grin
But somehow it's like a drug. You have to continue to build things like this  Cheesy (I already bought an Intuos3 Small for 20€ with pen and mouse Smiley )
The screen is reallllly crappy... (distorted colours even when you look at it at an 90° angle...).

-Jakob
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DaBotz
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« Reply #7 on: March 27, 2015, 06:29:23 PM »

Take a look at my "Gigantiq".

I used it in ubuntu, and had made some scripts ( you find them in the first page... to all, you have to remove the added .txt extension).

http://forum.bongofish.co.uk/index.php?topic=2381.0

I also used two mouses "wheel" as scroll controllers, used two of the same moses butons to raise/lower ubuntu's driver stylus stroke stabilization, a button to change active monitor, etc...
.

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The most incredible artist of... Barbanza?
XDjackieXD
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« Reply #8 on: March 27, 2015, 10:42:13 PM »

I made a script too but you can't really compensate the edge offset (even the cintiq has some)...
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