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1  Screen Tablet malarky / The Trading post / Re: Selling an LCD panel + LVDS controller set. on: October 12, 2013, 05:14:00 PM
Hi Bernard !

This is a 1280 × 800 panel.
As for what technology it uses, i am not sure…
Here is a link to the desciption pdf:
http://glp.lescigales.org/divers/Wacom/b154ew08v1.pdf
2  Screen Tablet malarky / The Trading post / Selling an LCD panel + LVDS controller set. on: October 07, 2013, 09:50:06 AM
Hi there.

I have a 15.4" LCD panel I don't use (it's from my former laptop). I've bought an LVDS controller for it, and the pair works nicely.
I wanted to use it as a second monitor for my netbook, but the stupid netbook can just work with the external monitor set on "mirror". Great.

So I'd like to get rid of that stuff. Maybe some of you may use it ?

The panel is a 15" B154EW08
The controller is a RM 5451.

It comes with the little keyboard, the inverter, the power supply and power cord (EU type).

Someone interested ?

3  Screen Tablet malarky / Build Logs / Re: The MimetiQ on: December 03, 2012, 12:26:51 PM
Yes exactly... Some day I'll go back and do some more work on that, but for now I feel as you do: I need to forget about that frustration and use the damn thing.

The build is 99.5% usable really: jitter is only there on the sides (for example when picking a line in a menu up there)
4  Screen Tablet malarky / Build Logs / Re: The MimetiQ on: December 03, 2012, 12:06:38 AM
Hi there !
Some update here: basically no changes ! Haha  Cheesy

Well, in fact i have made some tries with the copper sheet and i can't find no improvement at all... So i kind of gave up on that and finished the assembly without adding any copper, just the steel shielding between PCB and monitor.
Well, it is perfectly usable in fact: you have to try in real conditions, and suddenly the 1px jitter is of no importance. It only occurs on the edges anyway. Same for the random clicks: I have just made that little drawing (with my "I can't draw" very personal style of semi-architectural geometric nonsense) and no problems at all.


I use the soft grey nib directly on the wacom: I like it so far.

One strange thing though: When i wake Win 7 back from sleep, I have to unplug the Wacom and re-plug it for it to work: can't remember if it was the case before...
And if the monitor is on BEFORE the wacom, I have to turn the panel off, then unplug/replug the wacom, and THEN turn on the panel  Huh

Apart from that very minor annoyance, no serious problem.
I'd say what disturbs me most is the parallax effect: the nib is still a couple of mm away from LCD, so you have to be "in line" for the trick to work 100%...
5  Screen Tablet malarky / Build Logs / Re: The MimetiQ on: November 16, 2012, 05:49:58 PM
Hi Aerendraca !

Well, not really loosing enthusiasm, but getting more and more certain that i won't get rid of it all.
The random clicks have always been there on my build: I've already come to the conclusion that they wouldn't disappear when playing with grounding, but rather with frequencies (see page... errr...2 maybe ?)

I've changed the LED in that detector of yours: i've replaced the old green one with a much brighter yellow one. It is at least 10× brighter: it really lights up when i go close to my old notebook. But it still doesn't detect anything on my Mimetiq's panel. The amount of radiated field from these little inductors must be negligible...

I'd be happy to test out things for you, but I'd rather not play with Powerstrip ! Last time i tried a custom resolution/setting, Windows couln't boot up afterwards, i had to go all the way with restoration disc, backup etc...: too scary !
But nVidia's control panel is very complete, maybe that'll provide you the settings you want to tweak ?
6  Screen Tablet malarky / Build Logs / Re: The MimetiQ on: November 16, 2012, 04:22:58 PM
Well... first test with the copper sheet in addition to the steel one.
The steel is between the digitizer and the panel's PCB, the copper is on top of the panel's PCB.

No difference at all: the jitter is the same, random clicks too.
7  Screen Tablet malarky / Build Logs / Re: The MimetiQ on: November 03, 2012, 12:56:09 PM
Hi there !

I've been away for the last 2 weeks, that's why there hasn't been any updates.

I have made a shield out of .5 mm steel: it covers all the wacom's sensitive area apart from the portion that corresponds to the usable screen area. It is properly grounded.
But that did'nt help much in fact.

I received my .3mm copper sheet. I'll see if i can do something with it this WE !
8  Screen Tablet malarky / Build Logs / Re: Serenitiq - Intuos2 12x12Oversize & LG Flatron L1753PR-SF on: October 18, 2012, 08:09:13 PM
I don't quite get it to be honest...
You manufactured that piece we see on pictures 4 5 & 6 Huh

What sort of wizard are you ?
9  Screen Tablet malarky / Heyaaaalpppp / Re: Planning an Intuos 3 A5 build and need some input on: October 18, 2012, 09:43:08 AM
Hi there !

•LED backlight doesn't actually means less jitter in fact... My LCD is 3+ mm thick, LED backlit, IPS, very nice... But i get nice jitter and i have to shield the PCB properly. Not that easy.
•NJYTouch: yeah, but go for the one with DVI at least: in my case, the nVidia driver makes it easier than with VGA.
•Intuos 3s are nice !

And yes, i think it CAN work !
10  Screen Tablet malarky / Build Logs / Re: The MimetiQ on: October 17, 2012, 02:54:37 PM
Hi,

I followed Aerendraca's method and did that:


The LED is not very bright: in fact i can only get a faint glow while "scanning" my laptop (which uses ccfl). But the monitor of my cintiq-like build doesn't produce anything...
Maybe i should somehow amplify the current with some transistor ?
11  Screen Tablet malarky / Build Logs / Re: The MimetiQ on: October 17, 2012, 11:13:02 AM
Ohhh... I didn't even think about clicking the image ! Very interesting ! I'd be interested to build the same kind of contraption ! Can you tell me what's in there Aerendraca ?

As for the areas affected: I've taken everything off my build again, and i can go around the surface to locate the problem areas, and see if they coincide with the electronics in a way.
Roughly, jitter is different near the surface and away from it.
In both cases, it is quite calm everywhere, except for a 1cm band at the top and a bell-shaped band at the bottom. I can imagine there are leds there, not on the sides.

Concerning the oscilloscopes: well, i doubt i will be much into radio frequencies nor digital things etc... rather audio stuff, so i though a good old analog device would be enough. But the usb approach isn't bad: after all, i have an old spare laptop that could be used as a monitor. The problem is also the quality of the software. Apart from Hantek, what would you recommend ?

On another note: i wasn't careful enough and damaged the 2 tiny blue/green leds of the wacom. They still work if i press them gently: i guess i have unsoldered them a bit :-(
EDIT: LEDs fixed. Man, they are tiny !
12  Screen Tablet malarky / Build Logs / Re: The MimetiQ on: October 16, 2012, 10:49:36 PM
Interesting. Sadly (or not: i don't see how wacom mice can be of use frankly...) I don't have a mouse...
Why a wacom mouse ? Because it has some coil tuned to the frequecy of the board ?

Sorry, but i not too sure of what is to be seen in the picture...

If i understand it properly: you mean i could just connect an led to some coil and the inductance resulting from the rf would push a current through the LED ?
I have various bits of electronics thingys like miniature transformers, inductors, would that do ?
13  Screen Tablet malarky / Build Logs / Re: The MimetiQ on: October 16, 2012, 09:34:58 PM
Bingo !

I just lifted the grey fabric/adhesive that covers the PCB (can be seen on page 2 of this thread). And sure enough i found the same kind of inductor as Aerendraca mentionned.


I am sure this grey stuff is some kind of basic shielding: it is no ordinary masking tape and it goes all around the panel. I wish i had some copper to play with !

@ Bernard: What kind of price are we talking about here ?
I was thinking of getting an old-school type thing, like Hameg 303. Pure analog, uh ? No windows link etc... but i think for my basic knowledge, that's enough !

14  Screen Tablet malarky / Build Logs / Re: The MimetiQ on: October 16, 2012, 07:17:34 PM
Rhhhhaaa ! I want an oscilloscope !

Good work ! Tonight I will take off that strip of grey tape that prevents me from seeing the LCD's PCB.
Maybe I'll find some cousin of your inductance there.

The PCB of my panel is by far smaller than yours, and as it is LED backlit, it may well be completely different: i am curious !
15  Screen Tablet malarky / Build Logs / Re: The MimetiQ on: October 16, 2012, 02:50:09 PM
Yes, I have read some stuff mentioning you should always try to avoid ground loops. So I chose the point where there is a link going to the back metal plate (at the very bottom of the tablet) as a grounding origin. So the ground will be distributed in a star-shape pattern.

On another note, i was just thinking: can't the LVDS driver be a source of problems too ? At the moment it is located right underneath the wacom. Maybe i should put a nice big coat of something inbetween ?

And i was also thinking of building the wacom INTO my wooden desk. Now that would be cool...

Ahhh Brighton. We are almost neighbours then (if you know how to swim properly that is...) ! I used to travel through Sussex quite often when i lived in the UK: I had to take the ferry in Newhaven. Nice area ! I went to Beachy head this summer with the kids: sooooooooooo much wind at the top, a great moment !
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