DIY projection, open-source robotics, CNC, VR, mad science http://www.lumenlab.com/forums/index.php Fri, 20 Nov 2009 17:37:57 -0600 200 http://www.lumenlab.com/forums/index.php?showtopic=29297 There are different types and quality I would guess, this is the first one I found on gooogle

http://www.hydroasis.com/hy/productdetail....00-standard-hps]]> Fri, 20 Nov 2009 02:54:41 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29297 http://www.lumenlab.com/forums/index.php?showtopic=29295
Looking through the Projector guide and through various PLOGs, your Collector fresnel needs to be matched to the triplet projector lens (correct?)
What is the margin for error for this and what are the issues associated with not having it exactly matched?
I have a 342mm FL Triplet and 3DLens sells the fresnels I need, but the closest they have is 330mm (My collimator will be 220mm).

My plan is to use a bog standard 15" LCD (XGA) Monitor, if this makes any difference.

I just want to be sure before I order these, they need to come a Long way (I live in the UK, if anyone knows any UK based fresnel dealers please do tell! - Taking too long for an old OHP Unsplit to show up on ebay =()

Many thanks for any clarification, I've been scouring the board for the past 3 days pondering the design of my projector, Driving me mad ]]> Thu, 19 Nov 2009 05:02:08 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29295 http://www.lumenlab.com/forums/index.php?showtopic=29294 Much thanks]]> Thu, 19 Nov 2009 00:44:05 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29294 http://www.lumenlab.com/forums/index.php?showtopic=29288
My second question is concerning precondensers, as I don't know how to find a condenser lens that will work (I tried the precondenser calculator but i got confused ). Anyways, I'm using a 250w lamp, a 12.1" lcd, and it seems that the fresnels from my ohp are both 330mm focal lengths judging from how far the lamp and triplet are away from the fresnels (I realize that 330mm for the back fresnel is less than ideal especially for such a small lamp but I was wondering if it would work with a precondenser). Anyways, what diameter and fl should i be looking for in condenser lens? I found this one http://www.lumenlab.com/store/index.ph...;products_id=24 and this one http://www.agilentpixel.com/product.php?id_product=91 but I don't know what will work in my system. Thanks for the help.

Edit: I've been reading Dazzzzla's Plog (amazing looking projector) and here is the link to the precondenser he used http://www.surplusshed.com/pages/item/l3788.html. I'm also starting to think that I won't be able to use that 330mm rear frensel ]]> Wed, 18 Nov 2009 19:44:32 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29288 http://www.lumenlab.com/forums/index.php?showtopic=29286
I am in the beginning of putting to together a small cnc. I plan on using the stepper drive circuit below.
My question/confusion is, how I would interface the computer parallel port with my stepper driver?

I have looked at the schematic and under stand that pins 7,8,9 ( 7 being the phase and 8 9 being the logic) drive the motor. I am just not sure as how/what signal I will be using from my parallel port?]]> Wed, 18 Nov 2009 16:57:51 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29286 http://www.lumenlab.com/forums/index.php?showtopic=29279 I'm looking for a 15" with no FFC issues, preferably no Antiglare coating, good contrast and response.
the database info seems a bit dated, most of the monitors listed there are discontinued/unavailable.
Can anyone recommend a solid 15" LCD model?
I'm not doing anything fancy, finally getting around to using the old LumenLab projector kit that I bought a while back.]]> Tue, 17 Nov 2009 23:36:29 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29279 http://www.lumenlab.com/forums/index.php?showtopic=29278 http://www.engadget.com/2009/11/14/hallods...in-ja/#comments

Not bad price either, would work great if you were to strip it and keep all the boards, would make a nice portable projector able to play 720p movies without an external player. But of course, no inputs and likely impossible to find a controller for.

I just thought i would share!]]> Tue, 17 Nov 2009 22:53:46 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29278 http://www.lumenlab.com/forums/index.php?showtopic=29277
I am looking for something around 100-120 inches with some gain, doesnt need to be power

what is the best bang for the buck.

]]> Tue, 17 Nov 2009 19:46:27 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29277 http://www.lumenlab.com/forums/index.php?showtopic=29276 http://www.manhattanlcd.com/ that I have seen linked to many times before. The problem with this choice though is price, as I'm trying to keep the price of this project down and $325 is a lot to spend on an lcd. My other option I see was brought to my attention by kiradess in this thread http://www.manhattanlcd.com/, which is a 12.1" hdtv capable of 720p. I was curious how much of a difference in picture quality these two panels would provide, and which panel you would recommend. Any other suggestions I would be glad to hear and thanks for your help.

Also worth mentioning, I don't really need all the inputs on the 10.1" lcd as this projector is only for xbox (which has a vga cable), my laptop, and cable tv. I'm also not a videophile, as my current tv is ancient, but I do appreciate good picture.

Edit:Also, I have heard several mentions about a 12.1" 720p lcd kit for $200 or $250 but I am assuming that offer is over as I can't find a deal like that anywhere.]]> Tue, 17 Nov 2009 16:47:11 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29276 http://www.lumenlab.com/forums/index.php?showtopic=29275
In a nutshell: selective laser sintering, using powder coating as the medium.

I don't know much about 3D printing or powder coating, and I don't know if this possibility has been explored before (though I've never seen it). But it seems like this could be done inexpensively (as far as 3D printing goes), in the DIY domain, and make cheap, strong, finely detailed parts.

Here's some Wikipedia quotes regarding powder coating, and my thoughts on the potential for 3D printing.

"The most common polymers used are polyester, polyester-epoxy (known as hybrid), straight epoxy (Fusion bonded epoxy) and acrylics."

So there's a variety of materials, with at least some readily available and mass produced, for different physical properties you might need in a part. And in different colors too! I found polyester powder coating on Ebay for $6.00/lb, in single pound quantity. Not bad at all, considering you only consume the material actually used in the part, and the rest of the powder used as a support can be reused over and over.

"...most powder coatings have a particle size in the range of 30 to 50 μm..."

Sounds like it would allow for fine details, and smooth uniformly with a powder rake.

"When a thermoset powder is exposed to elevated temperature, it begins to melt, flows out, and then chemically reacts to form a higher molecular weight polymer in a network-like structure. This cure process, called crosslinking, requires a certain degree of temperature for a certain length of time in order to reach full cure and establish the full film properties for which the material was designed. Normally the powders cure at 200°C (390°F) in 10 minutes... The application of energy to the product to be cured can be accomplished by convection cure ovens or infrared cure ovens."

Perhaps it's possible to quickly fuse the powder into a cohesive part, using an inexpensive infrared diode laser. The relatively weak part could then be fully cured to full strength, while supported by a different powder medium (inert, not thermoplastic), in any oven.

Building this machine could be as simple as adding a powder tray, powder rake, and laser to a micRo.

Your thoughts on this?]]> Tue, 17 Nov 2009 14:03:10 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29275 http://www.lumenlab.com/forums/index.php?showtopic=29273
The fiirst picture is the one from the PC and the second one is from the projector.

It seems like some colors are switched?





Anyone know what could cause such thing?

Regards]]> Tue, 17 Nov 2009 04:26:50 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29273 http://www.lumenlab.com/forums/index.php?showtopic=29272
I want to build a high quality small projector. Im looking to use a 7" or smaller LCD screen. I wanted to know what would be the best LCD screen to use and the best light source. I want to use the projector for computer and xbox use]]> Mon, 16 Nov 2009 20:16:35 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29272 http://www.lumenlab.com/forums/index.php?showtopic=29270
]]> Mon, 16 Nov 2009 12:23:12 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29270 http://www.lumenlab.com/forums/index.php?showtopic=29269 http://www.califone.com/products/ohp2400.php is the site. There are links to the specs of the two in pdf form on that page. From the description, supposedly you can change the mirror angle up or down, and then adjust this knob to eliminate the keystoning. I wonder how it works. The 2400 model comes with a triplet head. I'm tempted to email them about getting a replacement head for the broken one I don't actually own. lol. I imagine it tilts one of the elements inside the triplet, either that or a lens in front of the triplet kind of like tilting the front fresnel. Anyone see this kind of thing before? Any thoughts?]]> Mon, 16 Nov 2009 10:49:03 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29269 http://www.lumenlab.com/forums/index.php?showtopic=29268
Ideas?

]]> Mon, 16 Nov 2009 08:31:03 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29268 http://www.lumenlab.com/forums/index.php?showtopic=29267
Guys, i came here to make a simple question.
Yes i have read the faq, and the projector lens aren't good for anything. That was exacly my initial question.

Regardless, now i would like to know, if i can change the DLP chip (the DMD) to a 1080P one?

Honestly, this 12kg years old ASK Impression 8300 SV projector looks promising for some modding:

http://img202.imageshack.us/img202/1795/dscn0007tp.jpg


Anyway, i have a suggestion.
Using a smaller-than-15 LCD for a Homemade projector is a good idea?
Check this: http://www.engadget.com/2006/10/17/sanyo-e...he-worlds-smal/
This would make homemade projectors somewhat smaller, if possible!

Thank you, see ya later ]]> Mon, 16 Nov 2009 08:02:09 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29267 http://www.lumenlab.com/forums/index.php?showtopic=29266
I am embarking on the project of building a pretty snazzy projector to "upgrade" on my ageing Infocus LP580B I got off ebay for £17.50
Anywah, I found a triplet among some old slide projector parts and Being the newbie I am don't understand the markings?

It reads "Hanimar 4 Inch Projection.......... f3.3" - It's most certainly a triplet having unscrewed it and inspected the lenses

Do any of these markings show focal length? If so is this even going to be useful? I was assuming 4 inch was the focal length but damn... I can't contend with a 443 Inch screen at 9 feet!

Oh Balls, This should have gone in the beginners area huh? - Damnit.]]> Sun, 15 Nov 2009 16:02:08 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29266 http://www.lumenlab.com/forums/index.php?showtopic=29264
I would like to know if anybody practically compared the bulb with same wattage and different CRI values (say 65 and 90)? How does a lower CRI bulb performs as compared to lower CRI value as far as color rendering is considered? Do we see a huge difference in picture quality?

Thanks,
Milind]]> Sun, 15 Nov 2009 12:01:25 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29264 http://www.lumenlab.com/forums/index.php?showtopic=29263 Fri, 13 Nov 2009 11:43:59 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29263 http://www.lumenlab.com/forums/index.php?showtopic=29259
Also wondered about warranty on the LL eBallast. Coral Vue says they have 3 year warranty on their eBallasts.

History: I built a projector a few years ago with the LL lenses and a 17" LCD. Has been working great with thousands of hours of running time.

Thanks]]> Thu, 12 Nov 2009 18:38:09 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29259 http://www.lumenlab.com/forums/index.php?showtopic=29257
Anyway, I've been looking on eBay for replacement triplets and not having any luck. Who sells these things anymore?
]]> Thu, 12 Nov 2009 14:49:28 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29257 http://www.lumenlab.com/forums/index.php?showtopic=29255
My center screen lux dropped from 99lux with the samsung to 50lux with the LG! Would a polished AG make that much of a difference? Or a higher contrast ratio? I didn't expect my lux to be cut in half, now it makes me want to deal with the LG's antiglare to improve some lux but we all know what fun that process is. Any ideas?


Samsung LTN154U1-L03 15.4" WUXGA vs. LG/Philips LP154WU1 15.4"]]> Thu, 12 Nov 2009 09:21:53 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29255 http://www.lumenlab.com/forums/index.php?showtopic=29252
I could stick a wire into the fan and hopefully knock it back in balance, but this got tiring doing it 10 times a night.

So I went to Radio Shack and bought the exact same fans that had lasted me 3 years.

http://www.radioshack.com/product/index.js...oductId=2102825

I was going for cheap.

So now a month later BOTH new fans are making noise like the bearings are going out. I called Radio Shack and since it's been a month and I have no recipt or packaging now, they won't even think about taking them back.

I'm out $50 and looking for a new place to buy cheap electronic parts.

So I need a nice quiet long lasting cooling fan. I'm not worried about price anymore.

The worst thing is my fans are deep down in the guts of my projector and I have to totally tear it down get to them.]]> Wed, 11 Nov 2009 10:33:36 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29252 http://www.lumenlab.com/forums/index.php?showtopic=29249
Just wanted to say thank you for all of the great information, and thought I would throw my first issue out there. I am getting a very crisp but very dim image. The colors are not very visible but I see a lot of detail in the picture. I was wondering if my lamp might be a little too far away from my LCD. I was using a set of two 550 mm FLs a 15 inch display and a 400 watt bulb. I ordered a 220 mm and am awaiting its arrival. My bulb is able 17 inches from my LCD. I am thinking I need to build a new light enclosure that is shorter. I did some pretty crazy stuff with some venting I picked up at home depot and took kind of a 3 chamber approach to the light enclosure.
So basically my question is: Do you think 17” is too far from the LCD?

Thank you.]]> Tue, 10 Nov 2009 23:49:32 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29249 http://www.lumenlab.com/forums/index.php?showtopic=29248
Hi, I thought someone here may know something about the status of Chen Ling...
I've bought a few things from him over the past year or so, but more importantly, he's been very helpful and responsive to questions, and I've appreciated that he's gone above and beyond in service by looking for specific items I'm interested in. Upon my request, he brought in a great little LCD panel and set-up a controller for it, then sent photos showing it functional, as it was a new combo, and we were talking about doing some customization/development. Unfortunately, I have not heard from him since Sept 24th, and am wondering if anyone has?
AP forums (YOINK) are full of spam from about the same time as well, indicating he's not online running AP.
I'm not concerned about my last order as I can get $ back from credit card, I'm just hoping he's OK and will reappear soon...
]]> Tue, 10 Nov 2009 16:01:38 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29248 http://www.lumenlab.com/forums/index.php?showtopic=29244 Mon, 09 Nov 2009 23:17:19 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29244 http://www.lumenlab.com/forums/index.php?showtopic=29243 Mon, 09 Nov 2009 21:31:24 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29243 http://www.lumenlab.com/forums/index.php?showtopic=29241

Thanks]]> Mon, 09 Nov 2009 09:09:09 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29241 http://www.lumenlab.com/forums/index.php?showtopic=29240 Im building a projector and im using the USHIO UHI-S400DD bulb and the E39 mogul socket.

My question is once i buy the bulb and the socket is there something else i need to buy to power the socket?
Something that can be plugged into a wall plug?

Please respond!
Thanks!

p.s. If you know of a store where i can buy these items relatively cheap let me know!]]> Mon, 09 Nov 2009 00:19:23 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29240 http://www.lumenlab.com/forums/index.php?showtopic=29238
I am really thinking of taking the lighting and some of the optics from my eVo to go 720p. So many screen options though...

That new 12" coby set looks awesome for the price, but is too big for any of the eVo optics. 10.x" is not cheap, and too big for the evo fresnels. is 7.2" is expensive. Surprisingly, found a 5.6" 720p kit for less than the 7.2", but cant tell if the panel is true WXGA. Theoretically it could be, here's the proof: http://store.shopfujitsu.com/fpc/Ecommerce...=U820&var=a. Any general thoughts / input on the panel i might use?]]> Sat, 07 Nov 2009 22:05:56 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29238 http://www.lumenlab.com/forums/index.php?showtopic=29237 Case - Frankenmoded Datamax Kid's Delight
Screen - Unmodded Zenith Psone
Batteries - 14.8v 4700mAh Li-Polys
Controllers - Gamecube, Mini Gamecube, Wii Classic 3rd Party, Dreamcast Quantam Fighterpad

Notes :
1. Memory card relocated to top.
2. Disc Drive relocated with ffc extensions.
3. 2-way switch for running off batteries or wall.
4. About 90 hours of work more or less.

Well here it is :









Added a disc cover that I'm not 100% sure I am happy with. I may change it or even paint it.






Youtube video :

http://www.youtube.com/watch?v=5A76rFWBmug]]> Sat, 07 Nov 2009 20:08:18 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29237 http://www.lumenlab.com/forums/index.php?showtopic=29236 ]]> Fri, 06 Nov 2009 22:53:04 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29236 http://www.lumenlab.com/forums/index.php?showtopic=29233 I am looking into retrofitting my lightware vp800 it has been an awesome projector but the quality of picture is lacking and would like to see if i could give it a facelift and make it work well again. Im pretty good with electronics but i have no idea where to start. If anyone has a tutorial i could follow or just knows where i should go for info that would be awesome. Thanks guys Fri, 06 Nov 2009 08:44:16 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29233 http://www.lumenlab.com/forums/index.php?showtopic=29232
I have a viewsonic PJ 556D (2k Lumens), which I wanted to mod. After that, I may wanted to mod my Dual lamp commerical Panasonic PT-D5500UL (5k Lumnes) projector.. When I took the original bulb out of the viewsonic. I only see 2 connection point, probably + and -. Therefore I was wondering if I just bridge the 2 connection, will that trick the system into thinking there is a bulb? Or must it done at the ballistic wire out? Anyone with a full understand could explain to me why if just bridging the bulb socket won't work?]]> Fri, 06 Nov 2009 05:06:12 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29232 http://www.lumenlab.com/forums/index.php?showtopic=29231
http://tesladownunder.com/LEDs.htm#100%20W%20LED

Apparently, they are selling these at around $100 on ebay

What is your opinion on this?

BTW, what PSU and lens you could suggest with this?

Following is the spec

• Lens Color: Water Clear
• Emitted Color : White
• DC Forward Voltage (VF): 30~35 Vdc
• DC Forward Current (IF): 3800mA
• Viewing Angle: 140 Degree
• Color Temperature: 5500~7500K
• Intensity Luminous (Iv): 5000~6000LM

]]> Fri, 06 Nov 2009 04:59:37 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29231 http://www.lumenlab.com/forums/index.php?showtopic=29230
So I decided I should finally tackle a few projects - first of course, the classic OHP...

So I have this really old OHP, and an old 15" gateway monitor i'm gonna strip down for testing - but i want to replace the very yellowish bulb in the projector, and wanted a bit of feedback on my choices. I was thinking THIS for the ballast, or maybe this. NOT that bulb thats with it (the ebay page), but was going to use THIS , for the bulb itself - That type of bulb was in this list here from these forums.

the projector already has a stock old lens, i'm not sure how to tell what kind it is (triplet or whatever), so any help on that could be nice - the model of this beast, has the model "3m model#66ar projector" on the side, i think its older than I am I dont even remember how I got it lol. It has a tag on the back, says 3M projector company, but its worn.

Anyways, I'm not really crazy about quality that much, I just want something to test for now, but want a good bulb/ballast I can use to build a better OHP in the near future - with (maybe) an HD 15.4" lcd. If you think I should go for a 250w bulb/ballast, then thats fine!

BTW, I probably will not be watching blu-ray or even that much HD at all...dvd quality is fine with me, so I Could go for just using a potable DVD player with RCA input, strip the poo outa that, and go from there.

What should I grab eh? Thanks all!]]> Fri, 06 Nov 2009 01:05:27 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29230 http://www.lumenlab.com/forums/index.php?showtopic=29229
http://cgi.ebay.com/Bulb-Lamp-for-MVP800-C...=item4149eff883

I was hoping a retrofit of a bulb that could last longer a 150w or 250w bulb that could last 4000-6000hrs

like http://cgi.ebay.co.uk/150W-6K-6000K-DE-HQI...018132001r20924

ps sorry hopefully this can start some research on on bulbs that can be retrofitted for commerical projectors..]]> Thu, 05 Nov 2009 12:47:49 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29229 http://www.lumenlab.com/forums/index.php?showtopic=29228
I have an NEC VT440 commercial projector, i have vertical lines approx 2 pixels wide running through the image at approx every other 10 to 15 pixel intervals, im guessing its shot, so as Baldrick would say, " i have a cunning plan"

Apart from the annoying lines which have rendered the PJ useless to watch, would i be able to salvage any parts from it ie, bulb lens to use in a diy project, below are some admitedly vague specs lifted from the NEC website.

I was thinking at the very least of building a small enclosure using the bulb, ballast from the NEC, and hopefully salvaging the optics to possibly use with a small screen, maybe from a psp??? at this stage im in the dreaming stage lol, but am currently trying to decide on the best project to undertake.

Any help/ideas would be greatly appreciated, i would mainly use it for movies with a bit of gaming, and due to size of room, would be looking at approx 60 inch ish image size maybe a bit more.

here are the specs for the optics/bulb

Optical
LCD Panel 0.9” p-Si TFT active-matrix, 8002600 dots (VT440) / 10242768 dots (VT540)
Lens Manual zoom, manual focus
F2.0 – 2.3 f=35.8 – 43.0 mm
Lamp 160W NSH lamp (130W in Eco mode)
Image Size 25 – 300 inches (0.64 – 7.62 m) diagonal
Projection Distance 3.94 – 39.04 ft (1.2 - 12.0 m)

]]> Thu, 05 Nov 2009 08:59:39 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29228 http://www.lumenlab.com/forums/index.php?showtopic=29227
removing the 1st reflective layer:



]]> Wed, 04 Nov 2009 22:56:57 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29227 http://www.lumenlab.com/forums/index.php?showtopic=29224
Im still a bit sketchy however on details and where to go for a step by step guide. I found the wiki guide but it says its under construction and all the others ive found are well dated and the product links are way too old to be of any help.

So my question, where should a begginer go for a detailed guide and/or up to date product list/requirements



Also, just out of curiosity, what would a 15 in. DIY projector go for in terms of pricing these days?


Thanks ahead]]> Tue, 03 Nov 2009 22:01:20 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29224 http://www.lumenlab.com/forums/index.php?showtopic=29223
I just bought two 54 inch wide blackout cloths in NYC [406 Broadway, new York, NY $4 a yard], and I plan on combining it so it becomes a 106-108 inch wide screen.

My question is, has anyone combined it before, and has the seam been very noticable for people? Any tips for joining them together?
]]> Tue, 03 Nov 2009 12:14:53 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29223 http://www.lumenlab.com/forums/index.php?showtopic=29222 http://www.youtube.com/watch?v=n6n6jW0XIV0

But I've had a few issues. Firstly the stage glass was totally smashed on the OH-projector, I'm guessing that this will not matter? Can I use it without the stage glass?

Second, I managed to get the screen appart (a mission without a screwdriver I can tell you!), its a Hyundai L72s, which is a 17 inch screen. Its a bit big but I figure I'll screw around with my computer display settings and make the borders smaller. Anyways - the screen seems not very transparent. It looks dim on the top of the projector, but its pretty much black by the time the light is aimed at the wall. Do I need a more powerful bulb?

The LCD panel itself is a very black film, do you guys normally just ramp up bulb sizes? If it's bright enough for a transparency, should it be ok for an LCD? From what I can see the bulb is a 130V 400W, which seems like it should be good enough? I can try post some photos if needed, so far this has turned out quite frustrating!

Thanks for any help!!!! ]]> Tue, 03 Nov 2009 04:45:58 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29222 http://www.lumenlab.com/forums/index.php?showtopic=29221 ]]> Tue, 03 Nov 2009 02:00:36 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29221 http://www.lumenlab.com/forums/index.php?showtopic=29220 (assuming the other parts can be found, seems to be a cheap way for a 1080p attempt)]]> Mon, 02 Nov 2009 23:46:36 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29220 http://www.lumenlab.com/forums/index.php?showtopic=29219 Optoma HD20

Contrast 4,000:1
Lumens 1700
Weight 2.9 kg
Resolution 1920x1080
Aspect Ratio 16:9 (HD)
Technology DLP
Color Wheel 4x speed
Color Wheel 6 segments
Lens 1.2x manual
Lens Shift No
Lamp Life 3000 Hrs
4000 (eco)


http://asia.optoma.com/product/ProductDeta...tegory=SG9tZQ==

Vivitek H1080FD

Contrast 5,000:1
Lumens 1800
Weight 2.6 kg
Resolution 1920x1080
Aspect Ratio 16:9 (HD)
Technology DLP
Color Wheel 3x speed
Color Wheel 6 segments
Lens 1.2x manual
Lens Shift No
Lamp Life 3000 Hrs (Standard)

http://www.vivitekusa.com/v_display_conten...subcategory_id=

BenQ W1000

Contrast 3000:1
Lumens 2000
Weight 3.4 kg
Resolution 1920x1080
Aspect Ratio 16:9 (HD)
Technology DLP
Color Wheel 4x speed
Color Wheel 6 segments
Lens 1.2x manual
Lens Shift No
Lamp Life 2000 Hrs
3000 (eco)

http://www.benq.com/products/Projector/?product=1574


what do you think?]]> Mon, 02 Nov 2009 19:26:10 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29219 http://www.lumenlab.com/forums/index.php?showtopic=29218 It had a 16ft throw, and was pretty good. Id like to change things up for the rebuild. Im thinking of building it into a coffee table, which would shorten the throw to only 9ft. I have a few questions before i move forward with this idea. Will i gain some brightness by moving it that much closer? With the lens being roughly 9ft from the wall, and the bottom of the image being roughly 1.5ft above the floor, will i have much keystoning issues at this angle? This is the new setup im thinking of using, im wondering if you guys think ill run into any problems. It will be as such: 400w MH > 220mm frez> 10.6LCD > 317mm frez > LL s15 triplet (320mm focal range right?) According to the FocalCalc it should give me a screen that is 85.44". On a 10.6LCD, what does that equate to in length and height?]]> Mon, 02 Nov 2009 01:05:41 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29218 http://www.lumenlab.com/forums/index.php?showtopic=29217 Its been 2 years since i was last here, and now the store is empty?? Are they not selling the standard and pro triplets anymore? Mon, 02 Nov 2009 00:43:55 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29217 http://www.lumenlab.com/forums/index.php?showtopic=29216
using the following:

using Windows Vista Media Center

sound: ABIT IP35 Pro onboard: realtek HD audio w/ optical audio out (this is setup to play out to my home theater receiver, it plays MP3 and games just fine, aswell as analog cable, ad ssues when I was setp on Windows XP)

tuners: hauppage hvr 1600
]]> Mon, 02 Nov 2009 00:21:04 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29216 http://www.lumenlab.com/forums/index.php?showtopic=29213 Sun, 01 Nov 2009 16:44:04 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29213 http://www.lumenlab.com/forums/index.php?showtopic=29211 Sun, 01 Nov 2009 12:47:47 -0600 http://www.lumenlab.com/forums/index.php?showtopic=29211