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Author Topic: colinus build log  (Read 51957 times)
colinus
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« on: February 27, 2008, 04:41:30 PM »

27.02.2008

Hi all!
As suggested I start a build log. I have already posted some things here: http://forum.bongofish.co.uk/index.php?topic=1206.0 about display cables extensions.

The project materials:
- Acer AL1511, a cheap but working 15", 3 years old display. No external power brick, but it seems possible to separe it from the central chassis
Edit: my acer is dead. In replacement I've found a cheap dell 1503 fp, works great.
- A never used wacom intuos 3 A4, given to me by a friend

The builder:

- All the tools needed
- My poor knowledge in electronics (hopefully bongofishers are here)!
- in advance I excuse for my poor English. I'm Swiss and usually speak French
- for my measurements, I will use the metric system (millimetres, centimetres, etc...) because I understand nothing to inches, feet and so on. Sorry.
- I'm a Freelance Graphic Designer, work on a pc, and a long user of wacom products.

The goal:

- have a good final design, ideally all black
- design in two parts: one for the power and central unit (perhaps also used as "docking station"), and the other composed of the lcd and the wacom: this one should be as light as possible
- achieving this in less than 3 months from now (if I don't put a deadline, it will go for years).

The project status now:
- lcd and backlit disassembled
- display cable extended
- backlit cables extended, need to fix some interference problems probably due to wrong cable gauge / insulation


Next to come...

colinus
« Last Edit: April 08, 2008, 09:05:44 AM by colinus » Logged

Switz
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« Reply #1 on: February 27, 2008, 07:12:24 PM »

Sounds awesome.
Freelancer here.
Mac and PC.
Love to make mine in black Cheesy

We use both inches and mm/cm here.  Don't worry Cheesy

Good luck...
Not much more to say lol

Also,
whoever your friend is, tell them to give me one too!! they are awesome.
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Made that, not my best, but I love it.  Firefoxy lol
It's all fun and games till someone loses a testicle.   Cheesy
colinus
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« Reply #2 on: February 27, 2008, 10:10:17 PM »

... whoever your friend is, tell them to give me one too!! they are awesome.

Hu hu, this friend has worked for 6 years in a refurbishing factory for all-electronics devices. He had a LOT of cool things to refurbish, form an G5 mac to an waccum cleaner of the sixties. But he had only one wacom... sorry.
But if you are interested, I have an intuos3 PTZ 630 to sell... she's totally ok, I've used it for two years only...
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colinus
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« Reply #3 on: February 27, 2008, 10:14:25 PM »

27.02.2008 22:10

For now I'm gonna change the gauge of the backlit extension cables. I think my cables are too small for 220 volts, and it's because of this that my backlit switch in "disco-mode" after a few seconds of normal use.

I'll post later if I'm not electrocuted! I hate working with high voltages.

bye.

edit: it was not because of too small gauge wires. it was because I had some sort of interferences between wires... don't know exactly what sort of, but once insulated with fabric tape it's ok.
« Last Edit: February 28, 2008, 09:15:35 PM by colinus » Logged

colinus
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« Reply #4 on: February 28, 2008, 05:52:14 PM »

28.02.2008 21:16:00

Hi all!
Always to the "backlit cable extension cables" fuckin' and borin' phase, with some problems...
The interference problem is now solved by insulating the wires with fabric tape. for that it's ok  Grin

BUT after a first test run (lcd and backlit on) of approx 20 minutes I've noticed that on the inverter board, 2 voltage regulators were seriously overheating (melted the protective plastic foil in the back of the inverter, and burned the wood of my table, don't smell good). I quickly unplugged everything, and there is hopefully no damage.  Cry

The matter is to understand the cause of this overheating. I think its because my cable gauge is too big... I'm gonna change (for the XXXtime) these wires to the same gauge than the original ones, and run a test again.

Did someone have an idea about this problem or had similar problems?

Thanks folks!
colinus
« Last Edit: February 28, 2008, 11:58:19 PM by colinus » Logged

AndreZX
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« Reply #5 on: February 28, 2008, 06:49:04 PM »

If you find out what was causing it, let me know. I had an inverter board go up in smoke as soon as I turned it on, but I've been baffled ever since then because I hadn't made any changes to it.
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Drewid
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« Reply #6 on: February 28, 2008, 08:25:01 PM »

Where is Ambidextrose when you need him ?    Roll Eyes
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Games work site:  Drewnorthcott.co.uk
Personal site: Bongofish.co.uk
colinus
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« Reply #7 on: February 28, 2008, 10:20:01 PM »

Ok folks,
for now I have totally remade the backlit extension cables with wires of the same (as identical as possible) gauge. I am running a test with backlit on and lcd displaying a movie. it make now 12 minutes and the inverter voltage regulators are just a little hot, nothing dangerous in my opinion.

I hope it is the good way near success.... the counter goes up.... tada.... I will wait for 20 supplementary minutes.

cross your fingers for me, bongofishers!
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Drewid
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« Reply #8 on: February 28, 2008, 10:52:11 PM »

Fingers crossed here.
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colinus
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« Reply #9 on: February 28, 2008, 11:53:35 PM »

Ok, as a first test, 50 minutes without overheating. A little bit more hot than "usual", but I think that I can add two old aluminium heat dissipaters to these voltage regulators.

To do:
- insulate the backlit wires
- installing aluminium heat dissipaters on the inverter
- running a test of 4 hours of continual use

And after that I can start the wacom attack part! Where is my circular saw??

Have sweet dreams!
colinus

ps: for the brand of my screentablet, I think "bongofishtik" will be a good one, nope?  Grin Or is it a registered trademark? Hu hu....
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colinus
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« Reply #10 on: February 29, 2008, 04:41:32 PM »

Hi folks, I've uploaded some pics to my server:


One of the two backlit extension cables. Not the definitive wire gauge. I've replaced the negative ones with smaller gauge.


The ZIF cable I have to extend (thanks to diy-beamer.com)


The first test, running a movie. Everything is a little bit messy but it works fine. On top of the pic is the display cable.



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colinus
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« Reply #11 on: March 05, 2008, 11:09:57 AM »

Ok guys!
After two days of tests, I'm not ok with the backlit cable extension phase.  Angry
I have tried all sort of techniques:
- insulated the wires with wax paper / aluminium foil / fabric tape
- connected the wires to the earth

And I always have interferences between the wires. 

The only solution to make it work is to align the wires side by side, with one centimetre spacing between them. Like this it works fine. But I can't use a home made flat ribbon cable of 10 centimetres large going from my "control box" to my screen tablet, it's not really useful.

Here is a schematic of the building I would like to do:


The 100$ question:
how do I proceed to extend this fuckin' backlit cables WITHOUT interferences?

The two other solutions:
- using leds for backlit
- mounting the inverter under the screen tablet (the bad solution)

Some suggestions? Heeeeeeeeeeeelp me please guys! Dose someone here has already extended backlit cables with success?
Thanks.
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Switz
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« Reply #12 on: March 05, 2008, 02:50:50 PM »

I would try some sort of lead or efi (emi? I forget the exact one) tape.  Blocks electromagnetic waves.)

That should do the trick.

Great updates here.
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Made that, not my best, but I love it.  Firefoxy lol
It's all fun and games till someone loses a testicle.   Cheesy
colinus
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« Reply #13 on: March 05, 2008, 02:52:25 PM »

I've found this:
http://www1.acryan.com/_conductx/ACR-CB0465.shtml

Some sort of CCFL cable extension... suitable ?
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Drewid
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« Reply #14 on: March 05, 2008, 03:03:41 PM »

You know that might work.  Those could solve a lot of problems.
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Games work site:  Drewnorthcott.co.uk
Personal site: Bongofish.co.uk
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