Da lil ally 7" lilliput project

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thanks! I think I know which one is the winner!
It's easier for me to order the monitor on the german site and it looks pretty good @ specs...

I'm going to sleep now and rethink my builing plans...

ps: i know it's almost 8 in the morning but I spent the whole night printing pics in my darkroom for school so I think i earn some sleep now 🙂

Oh and German is no prob: my mom teaches it in school so I'll ask her to do difficult translations 😉
 
Multipourpose VGA Box and PAL signals

Hi IEF !

I cant get my Lilliput work properly with PAL N signals. The screen goes black with a "No Signal" message when PAL N signals are feed on the Composite Video input (1 or 2) on the lilli.

That is why I´ve purchassed a Multipurpose VGA Box with Component input (from LikSang same as you) in order to :

1) Improve DVD watching via component video output to VGA (DVDs here are Zone 4 NTSC)

2) Feed Pal N signal (TV broadcast system here is PAL N) to the box and convert it to VGA for the Lilliput (to workaround the apparent incompatibility on the Lilliput with PAL N signals)

The Box works great with NTSC but with PAL it generates a 50Hz (Vertical frecuency) VGA signal (due PAL is 50Hz) and the Lilliput shows an "Out of Range" message on screen with Pal signals on the VGA box.

I was wondering how your Multipurpose XGA box works with PAL signals and the Lilliput.

Do you feed PAL signal on the box or you only feed NTSC signals ?
And with PAL signals, is the box capable to generate a 60Hz VGA signal from a 50Hz video PAL signal ?

And the last one: What functions control the four DIP switches on the XGA box ?

This box is my last change to get the Lilliput work on PAL .

Thanks !!

Best regards,

Bernardo.
 
haven't got a clue. the manuals description is abit skimpy.
i haven't touched em so far coz it works.
don't ya got that manual?
i'll have a look in that manual when i am @ home to figure out the function of these tiny switches. but in your box it may varie coz u got a different model.
 
Greetings from South Africa

Hi All

I'm new to forums, but have been reading many online articles
about 'building your own LCD projector'. I never thought that this
would be possible, until reading up about the possibilities.

I must firstly commend everyone here who is actively involved
in sharing their knowledge, experience and often, design skills,
in their respective projects. "I_eat_flowers" ... amazing looking
pj. I love small size compared to what I have seen elsewhere.

As most people have indicated, biggest resolution, smallest dpi
is the best way to go. Two particular sites I've been to utilise
a 15" LCD module as their source. Granted that this possibly gives
the biggest, porjected image, but also guarantees a proportionally bigger pj box.

It would be hard to hide such a unit which is almost half the size
of my couch. Reading through the seemingly endless posts in this
Video section, I see it is possible to use smaller LCD sources.
Hopefully I will be able to make a pj which is the same size or
maybe slightly bigger than a Standard Mid-Tower PC casing.
The projected image size I am aiming for is:

4:3 - [ 150cm (w) x 112.5cm (h) x 187.5cm (diag) ]
16:9 - [ 150cm (w) x 84.38cm (h) x 172.1cm (diag) ]

in inches that woud be:

4:3 - [ 59.06in (w) x 44.29in (h) x 73.82in (diag) ]
16:9 - [ 59.06in (w) x 33.22in (h) x 67.76in (diag) ]

The room is small 4.6m (15.1ft) x 3.6m (11.8ft), so anything bigger would look overwhelming. The layout of the house/room forces us to sit across the length of the room. ie. projected screen wall to wall behind seating = 3.6m (11.8ft).

Hopefully after reading through enough posts regarding 6" to 7"
LCD sources I will be able to start sourcing the required parts.
That may be a problem here in South Africa, as very few local
Electronics Suppliers have webpages, let alone an online catalogue.

I foresee myself having to source parts from overseas, from suppliers who can ship to South Africa. I know that certain online retailers have shipping laws prohibiting them from shipping outside the U.S.

My first interest would be to see if I can 'modify' my (currently
working) slide projector by maybe changing the light source, adding cooling, and using a ~1" LCD source.

My second choice would be to use a 6" to 7" LCD source, which currently I know I can only buy from most local car audio shops, who sell the headrest/dash-type LCD screens.

Hopefully, in the not too distant future I will be able to post
my work here.

regards

Gary
 
Hi All

I'v started investigating with the slide projector. It's an OLD
Prestonix 680 Auto. Luckily I got it with the manual.

As per the manual: replacement Lamp - 24V 150W Quartz iodine
Details on the current Lens : Will-Wetzlar Maginon 1:2.8/85mm

According to the manual I can use a variety of lenses with this
unit. 2.8/50mm; 2.8/85mm; 2.8/100mm; 3.5/125mm; 3.5/150mm;
3.5/70-120mm zoom; and a very high definition 2.5/90mm lens.

Some testing I done with normal photo slides. The image section
on the physical slide measured [w x h x diag] :
3.4cm x 2.2cm x 4.05cm (1.34in x 0.87in x 1.59in)

The projected image [w x h x diag] at [distance from lens to wall):
3.0m (9.84ft) - 127cm x 82cm x 151.17cm (50.00in x 32.29in x 59.52in )
3.6m (11.81ft) - 150cm x 99cm x 179.72cm (59.06in x 38.98in x 70.76in )
4.0m (13.12ft) - 170cm x 110cm x 202.48cm (66.93in x 43.31in x 79.72in )

These are approximate, as the dim bulb and ambient light in the
room didn't allow for extremely accurate measuring. Now to source a LCD module with dimensions close or equal to the slide....

I will post some pics of the lens, slide projector and room soon.

regards

Gary
 
The lens
 

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The home theatre room-to-be. The light on the right-side of the pic is coming from the patio door, which currently has beige blinds covering it. That will have to be stepped up to dark, heavy curtaining.
 

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What type and size of LCD did you use? Did you change the bulb of the projector, or was the current bulb sufficient? Were there any cooling problems.

I've been looking around for high-res 2" LCD modules, but haven't found any sources yet. Looks like I will have to go the 6" ~ 7" route.

The saga continues .. :xeye:
 
clutchcargo said:
I have made the projector you are attempting. It wasn't impressive. You need many more pixels. Even ps1 sucked. It gives you the bug and you want more. The best thing it did was winamp plugins.🙂

did you really use the lilliput with 800x480 reso? i guess u've used one w 320x234. yeah, that sucks man. there are so many other pj's built w that tft that i suppose u haven't used that one all the other guys( hezz, ace) are usin too, right?
buy the high reso lilliput and u'll see the difference is amazin.
 
fuzzyman said:
What type and size of LCD did you use? Did you change the bulb of the projector, or was the current bulb sufficient? Were there any cooling problems.

I've been looking around for high-res 2" LCD modules, but haven't found any sources yet. Looks like I will have to go the 6" ~ 7" route.

The saga continues .. :xeye:


heya fuzzyman,

u won't be successful w da stuff you bought. hard to find a small lcd w high reso. then it'll work. if u have enough money buy this: http://www.vrealities.com/iglassespc.html .

hey, i use 7" lilliput same ace's usin.
why change the bulb of projector? the hole enclosure is diy. it's not a ready made one as u intend to use.
go on, read through this forum to catch as much information as u can get.

greetz.
ief
 
I think the ppl trying to sell those VR glasses for $700 are living in their own VR world.

IEF, I like everything about your setup, I was just looking at the "less to do" options before looking at building from scratch.
As suggested, I'll go through the posts here and browse the links and resources given.

May end up cheaper sourcing the parts from overseas, including local customs charges. A 7" LCD display made for car headrests / in-car DVD systems, sells for R1800 ( $276 ).
 
Eat flowers, I am going with the new 8 inch lilliput. 1024 x 768 So I can at least project the hdtv minimum. I have made a few projectors and purchased an ask 800x600 a4 which I destroyed and stripped out the optics. Minus bulb.

I should get a real small setup. I am looking forward to sharing results.

I mentioned the slide projector experiment incase anyone was contemplating the hand held 1.5 inch screens. in a slide projector. It fell together took about two hours of mucking around. Basically I learnt about the lenses condensors etc and fresnels.
 
I_eat_flowers said:


thx for the nice words dude.
that's worth it in case the reso is 800x480 as this one http://lilliput.cn/619.htm i use.

i think it's hard to get all the bits and pieces in south africa, isn't it?


Thanks IEF.

I'll be reading thoroughly through this and ACE3000's threads early next week. Only have 56k dialup access (anything else is too expensive) - do my reading at work - instead of wasting phone bill being online @ home.

I'm going to contact OSRAM next week about lamp prices. Hopefully I'll have something to report back mid-next-week.

Enjoy the weekend everyone. 🙂
 
Lamp Supplier Found

The week has started off relatively well. Osram S.A. managed to point me towards a local company called Lamp House +27 21 5516322 (for those DIY'ers in S.A.).

They've got the OSRAM HTI 152 GY9,5 + Base for R 677.16 ( $109 ) C.O.D. This is just the lamp, no reflector or ballast though.

I now need to source a ballast for the above. How do I know what type of ballast is needed ? Here are the details taken from OSRAM's site:

Luminous Efficacy in lm/W: 67 lm/W
Operating voltage in Volts: 95 V
Rated current in Amps: 1.8 A
Rated wattage in Watts : 150 W
Average luminance: 4200 cd/cm²
Luminous output in lumen: 10000 lm
Colour temperature in Kelvin: 5000 K
Arc length in mm: 6.7 mm
Distance a / LCL in mm: 30 mm
Electrode gap cold in mm: 6.7 mm
Length over all (LOL): 48 mm
Average lamp life in hours: 2000 h
Hot restart: no
Operating position: universal


BTW, is it feasible to use multiple compact-flourescent bulbs. The 25W version is rated at 2000 lumens each.

That's all for now.
 
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