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Author Topic: jittering pointer  (Read 96791 times)
wei803
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« Reply #30 on: February 02, 2007, 04:15:32 AM »

Here's some gif animation to show what I meant.

1st stage (nothing covering):


2nd stage some aluminium foil:


3rd stage extra aluminium foil:
« Last Edit: February 03, 2007, 05:26:29 AM by wei803 » Logged
Drewid
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« Reply #31 on: February 02, 2007, 07:24:56 AM »

Some big improvement then.  I think you may crack the problem with some more testing.
Have you tried different speeds in the tablet serial port? You can set these using the UDconfig tool.
Also the Wacom drivers have different read modes, might be worth fiddling with.
 
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wei803
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« Reply #32 on: February 02, 2007, 07:32:55 AM »

 Cheesy will try that. thanks Drew.
« Last Edit: February 02, 2007, 07:41:28 AM by wei803 » Logged
Rumi
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« Reply #33 on: February 02, 2007, 08:12:27 AM »

That's a good improvement with the jittering  Smiley .... what are you shielding and how?
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wei803
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« Reply #34 on: February 02, 2007, 08:24:38 AM »

Rumi, first I protect the vertical and horizontal circuit that "stick" on the side of the LCD with cling film.
Than I warp the whole circuit with aluminium foil. I also use the foil on the extended signal cable that lead to the main circuit.
For the main circuit unit, I attach it back to the metal peice that it came with in the monitor.

I will post a photo i took later, forgot to transfer it yesterday.
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Drewid
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« Reply #35 on: February 02, 2007, 10:31:08 AM »

Did you earth that foil as well?  If not that might make it more effective.
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wei803
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« Reply #36 on: February 02, 2007, 11:12:21 AM »

All i did was connect the foil to the metal sheet where the main circuit located.
Let's say to earth it, I just have to link it up to the earth pin of my wall socket right?
----------
[]|   <-- earth pin
ll
----------
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Drewid
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« Reply #37 on: February 02, 2007, 11:43:38 AM »

That would do it.
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wei803
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« Reply #38 on: February 02, 2007, 03:50:29 PM »

not much difference if I earth it.

here's the picture of my test setup.
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Drewid
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« Reply #39 on: February 02, 2007, 06:39:39 PM »

Looks like some kind of NASA thing !
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Chems
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« Reply #40 on: February 02, 2007, 09:49:12 PM »

Well it looks like you should just keep on adding Shielding.

You need to make sure there are no gaps in your sheilding at all or it will escape.

Tell us how it goes!

Fortunatly my LCD produces nothing, Ive tested it out only with my smaller A6 tablet, I think there may be some random left clicking but thats probably just me pressing down.

The Screen is/was a Compaq1501 I highly recommened it. Maybe save yourself some time and get one off ebay?
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Rumi
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« Reply #41 on: February 03, 2007, 06:04:30 AM »

That's great Wei, I will have to try that!  Smiley
Did you extend your backlight cables? They look quite long.
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wei803
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« Reply #42 on: February 03, 2007, 02:29:23 PM »

Rumi, I'm yet to extend the CCFL cable. Those two cable are connecting the foil to the metal sheet. Testing to see if that help. Apparently it does nothing. You should test on yours too, see if we could come out with a solution.
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wei803
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« Reply #43 on: February 04, 2007, 09:39:54 AM »

Still no hope, even trying what Rumi did, warping the tablet inactive area.
I think i will put the LCD aside and start looking for a new screen.
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Drewid
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« Reply #44 on: February 04, 2007, 02:35:23 PM »

Can you put name rank and serial number on the "bad monitors" list please.


Ta
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