| bitbyter |
| I believe you have inspired us all. Could you post another pic with dimensions or maybe an everyday item in the picture as well so we can get a sense of scale?? |
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| ace3000_1 |
the size of the thing is about the same size of a vcr but twice the hight, the sizes are 32cm deep by 39cm wide by 14cm high its about the smallest u could make for a 6inch lcd screen, the thing is very compact, trust me or just ask my hands lol it couldnt be anymore compact.
Trev |
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| Video Freak |
| OK more picture Ideas, First damnnnnnnnnn that thing looks stylish, second can you take a pic with the " cover off" and mabe some screen shots, ya know all the diff angles Austin power style........." and Im spent" LOL |
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| ace3000_1 |
ok first thanks heaps for all of the people who have said great things about my projector and second ill send a couple of more pics and in this one it is with the cover off but u wont see the fins i made today for the light trap in the front so i dont get any light whats so ever out of the front grill that way it is black on as it is off lol by the way the fins i made today work perfect and i only needed 2 ill take a pic of them in a day or 2 and sorry for the quality of the pics but trust me the cam makes the projector look **** compared to real life
Trev |
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| ace3000_1 |
ok this is a shot of the back with the input sockets and the power, main power switch and the fuse holder, the main power switch just isolates the power from when u plug it in as all powers on when u plug it in, once the unit is plugged in and on u can turn it on and off as manny times as u want via the remote as it has a standby system. If u care to look to the front right u might be able to see the 2 relays i made for all to power on and off via the remote wich are tapped into the lcd controler board via 2 wire's
Trev |
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| verbose mustafa |
| Finally, Someone implimented a remote control :). Very nice job. |
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| Property |
Yeah...After, what 4000+ posts in this forum now, you win the 1st Most Nicely Built trophy.:wave2:
By the way! What is that, melamine veneer?
Congratuations also on a projector that doesn't look like a Nuclear Warhead! |
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| ace3000_1 |
| lol its actually marble fits in well over this side of the world well in the mederteranian anyway lol |
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| zardoz |
Let me congratulate you on this excellant piece of equipment you have created! You have shown that you think "outside the box". You have mastered all of the design elements from what I have seen, it's small, its functional, its cheap and so far its the pretiest PJ I have ever seen!
KUDOS! You do the DIY community proud!
zardoz..wishes his PJ looked 1/2 that good ;) |
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| ace3000_1 |
yayyy zardoz u are finnaly here thanks for the nice input for the projector, listen if u want to get your sreen hooked up to your projectors get in contact with me at msn messenger or yahoo messenger the name is same as in here, ace3000_1 ive worked it out for u just got to tell u how to do it and it will be pro and will cost u about 3bucks lol
Trev |
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| Psionic |
hey zardoz,
You don't happen to still have that beastly enlarger lens, do you? |
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| zardoz |
| quote: | Originally posted by Psionic
hey zardoz,
You don't happen to still have that beastly enlarger lens, do you? |
Yes sir I do. Where the heck is Fenwick? (Ontario is my old home province)
zardoz |
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| ace3000_1 |
howdy zardoz, can u plzz tell me the link to go to that site that sells delta lenses or used to, i cant find it anywhere in the forum although i did see it twice when i was reading the forums months ago lol aways the way
Thanks Trev |
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| ace3000_1 |
heya spinnaker thanks for the reply and link but ive got that one, it was another like diy labs or somthing simmilar, i tried diy labs but its for sound lol i know there is one in here somwhere i spent about 4hrs last night trying to find the darn thing but not yet lol
Trev |
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| mcarangelo |
Hi all,
I've been monitoring the posts, and working on a projector for about 3 months. I got some parts from Alan Staples and came up with this...
http://www.mdc.nicsystems.com
I will add some design info soon. |
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| Property |
Nice man, Nice.
Reminds me of one of those old style telephones, the ones with the bell on top....or maybe a bank machine...Looks good...Is that a fresnel between the panel and objective? |
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| Video Freak |
| HEY MCar looking good, few questions what type of bulb are you using, do you have pics of the inside of the projector? also did you take any Flat cable lengtening pictures? how long did you make the " splice" Pics pics pics |
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| mcarangelo |
| The bulb is a regular 400 watt MH400U. I just took a bunch of pics that I will post in the morning. The cable was a .5 mm pitch with 10 conductors. I used an exacto knife to split the lines and very carefully soldered some flexible 7 inch wires onto it. I soldered another 4 inch piece of ribbon cable that I purchased that would plug directly into the socket that the original one cam out of. It took about 2 hours. Check my site tomorrow. Thanks for the interest. I took some cool pics of my PC on the wall too. |
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| ace3000_1 |
| great job mccar excelent results too all u need now is the marble ive got on mine to shaby it up abit lol |
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| ace3000_1 |
chbright i beleive that is the site thanks buddy a heap, u just saved me countless hours in the forum reading looking for it as it is i was in there tonight another 3 hrs lol
Thanks Trev |
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| ace3000_1 |
anyone out there wana donote a condenser lens? or sell one? lol
Trev |
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| Mavmesa |
mcarangelo
Nice job!!
I have constructed my projector on Alan's design, but do not have the mirror to fold the focal point on the fresnel lens.
I am waiting for my new fresnel and triplette lens to arrive to perform my first upgrade on the unit. I am only running at 100" and am still not satisfied with the brightness and the contrast of my old OHP lenses.
Did you experiment with any other lense before using the triplette? Did you split you fresnel or mount the double fresnel behind the lcd? Are you running an exact 14" focal length from the light source to the fresnel?
Thanks, since we are working from a similar base, I thought we might be able to do some direct comparisions.
Ken |
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| mcarangelo |
No other lens compares to the triplett. I compared a meniscus just to see. No contest. I did not separate the fresnel. I did cut it down to make the unit a little smaller. Cutting it was not easy because it is brittle.
You really don't want to put anything in front of the LCD. Once the light passes through the LCD, anything you do will add distortion, with the exception of a front surface mirror- which is expensive.
The mirror doing the folding inside my design is a regular 12" square mirror that I got from Walmart $8.00 for a pack of 10. I had to cut it down to 10" on one side with a glass cutter. EZ. I found that the lamp worked better at 15". Probably because it is not a true point source and moving it further back allows more of the light coming from the bulb to be utilitized but that is just a guess. If you have microsoft Publisher, it can really help you construct the angles that you need. You just need to know your trig.
I will be posting more design info on my website today.
http://www.mdc.nicsystems.com |
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| ace3000_1 |
well before this thread is about to die again here is somthing that might give a few answers with laptop lds and lcd's with no controlers
http://www.eio.com/lcdconnect.htm |
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| 18wheeler |
| quote: | Originally posted by ace3000_1
well before this thread is about to die again here is somthing that might give a few answers with laptop lds and lcd's with no controlers
http://www.eio.com/lcdconnect.htm |
Please put this piece of information in the "newbies" thread, with proper reference of course. |
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| ace3000_1 |
| yeah that thread must be going back abit too by now |
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| usa_satriani |
Hi !
I will recieve my optic parts from DIY Lab soon.
But I'm wondering which design I will do : is it easy to use a miror before the lens to change the direction of the projector : horizontal to vertical ???
thx |
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| rmccoll |
| I got this laptop of ebay for $40, it's a Compaq LTE 5000 11.3'' tft screen 800x600. It just happens that the 5000 Series have a special adapter that lets you watch full screen video and enables Mpeg 2 playback, so I bought that too. |
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| rmccoll |
| I dont know how to put two or more pictures on a single post, heres the adapter it has video in/out, s video in/out, audio in/out, vga out and a place to put your keyboard and mouse. It connects to the docking ports of the computer. |
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| Negative Design |
| whats its contrast ratio? speed?and coors. |
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| rmccoll |
Negative Design:The Cpu speed is 75mhz, it's really old, the book that came with adapter said it can produce full screen video at a good speed. I have no idea what the constrast ratio, or how many colors it can produce, I have a Toshiba laptop that has the same screen it can produce 640x480x16.4million and contrast ratio of 100:1 so I guess they can be the same but I don't know.
Property: The Compaq LTE laptop are the only ones I know of that have this kind of adapter, but there are two pcmcia card capture devices, Irez capture card and the Margi Tv to go pcmcia card |
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| Dnt32 |
Ace3000
Have you tried this yet I have also been thinking on this subject somewhat except i was thinking of glass that had been acid etched or something.
I have finally started getting some equipment so soon I will be needing my screen, I'll be experimenting it also |
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| ace3000_1 |
na i havnt tried the sand blasting idea yet i think it will work diff from the glass idea being etched as the perspex will have pits that will get illuminated, i figure u will need a very fine grit so the pic will look fine and u will not get any bright spots on the image of the pits lighting up too much or to big in each pit , im sure the glass idea will work though but abit different, it might not be as effiecient either we will have to give it a try, good luck if u do before me
Trev |
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| rmccoll |
I got all the pieces to laptop, I installrd all the software and hookup the the adapter, I started the program that lets you watch tv on it and the screen went crazy, the program didn't even start, I've tried changing the resolution, reinstalling all the programs and the damn thing just won't work. If anyone is good with computers could you please help me.
The laptop is a Compaq LTE 5000 75Mhz, 16Mb ram, 1.3Gb hd, 11.3 tft screen, floppy drive, battery, Mpeg and Tv adapter and Windows 3.11 installed, all other program work fine. I'll sell for $75 bucks or who ever has the best price if anyone wants it, even if you can't get the program working it can make a great second or backup computer.
Remarque@carolina.net |
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| vassarguy |
dunno if this is the right place to post this. I tried starting a new thread, but every time I did the window popped up telling me to search the forums, which I've already been doing nonstop for the past few days.
Anyway, I was wondering if anyone has taken a look at NEC industrial LCD screens. They make a few 6.5" screens, one of which has XGA resolution (1024X768). It seems like one of these would be perfect for those who want to make a smaller projector but with the resolution of one of those 15" monitors. The model number is NL10276BC12-02. It's got XGA res, a 300:1 CR, and 21 ms response time, running at 16 million colors.
The only issue I can see is it requires a LVDS connector, which I know nothing about. NEC also makes a few 6" VGA panels, which take CMOS connectors. Again, no clue. If any of you electronics genii could shed some light on this, that'd be great. I sent an inquiry to find out how much these would cost, and I haven't gotten a reply yet.
Right now there's one of the VGA panels going on ebay with a buy it now of $80, if you want to find out if they can be disassembled easily. If it turns out that we can buy the screens in quantity, would anyone be interested? Thanks.
If you want to check out the lcd screens, go to www.nec-lcd.com, click on English, and then go to the industrail section. |
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| verbose mustafa |
| Been there done that. That LCD is about $600 + anothor $200-$300 for a controller :). |
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| vassarguy |
| sorry then, i searched quite a bit and couldn't find anything about it. oh well, it seemed like a good idea |
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| prjctr_builder |
Guys, sorry i gave up last july, but do not get me wrong, i spent all my savings on Dukane 680 and sharp QA-2500 and got very crappy results. as a matter of fact, people with $30 panels got a better picture than me, and i payed $270 for my prohection panel...
now, since my brother moved out, i hva a huge room downstairs that begs to be turned into a movie theater.
i read the whole forum over again just to be up to date, and ordered some essential items already. the only problem that i am facing now is if i should go the 15" monitor way or buy some LCD and a controller. my monitor has 400:1 contrast ratio, and getting an XGA 10" or less LCD with such contrast it tough and expensive. if any of you have any idea on which LCD i should use, i would be glad for any input.
ACE has astonished me with his setup, it sure looks pretty, but man, where are the pics of a projected image?
good luck all:idea:
P.S. i'll try to be of most help i can be....:grouphug: :grouphug: |
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| ace3000_1 |
heya bud good see u are back although we have never met, always good to get one of the older guys back in here, ok i havnt posted any pics basically cos of 2 reasons, 1 i havnt got my mh yet and 2 i need a wall without other **** like pictures on it first to make a pic lol ill get a resault pic out soon so dont strees all another reason is i havnt tried my cam on it yet im not sure if my cam will take it as ive only a benq dc1300 camera and its dark without a flash on other things so i havnt bothed with a pic of the projected resaults yet lol but ill try soon
Trev |
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| prjctr_builder |
ACE,
your projector is hella tight. When i first took a look at it, i thought it was a remake of one of those INFOCUS projectors, with an objective on the side. but after i learned that you built the whole thing from scratch, i was like whaaaaaaaaaaaaa.
could you tell me what kind of LCD you are using in your setup? the specs of that thing would help a lot. primarily the contrast ratio.
also, just a thought, your LCD seems to be awefully close to the bulb. aren't you afraid to fry you LCD? i know that once you put it an MH bulb, it will generate a lotta heat...
good luck all....:nod: |
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| ace3000_1 |
heya there well ill start off with the lcd lol its just a 960x240 tv lcd thats probally got the contrast of 80:1 if that but its my first project and i had to start with somthing right? lol
ok the light i have in it is a halogena thats the name of the bulb and it is halogen it puts out 2550lm at the bulb.
Now the projector puts out between 250-300lm ansi at about 60-80inches although i can fully watch it still at 120inches probally about 200lm at 100 inches
Now with the light being so close, funny enough the lcd just gets warm i beleive i have eliminated alot of heat buy making the light box enclosed and also having fans blow the hot air away from the bulb, that idea is to cool down the source of the heat and it seams to work well. I have a magnifying glass as a light magnifier before the frensel and also acts as a condenser that funny enough is better at speading the light over the lcd than a 2inch condenser setup properly.
Soon ill have a new projector built this one is not very big even smaller than a infocus lp220! i found out the otherday mines 2.5cm lower on the hight and about 1cm smaller all around so i spun out at that. Im getting a new lcd soon and that will go into my new one that will have a 250w hqi behind it and the lcd will be a 6.4inch 800x600 native takes upto 1024x768 and contrast is 200:1 i cant wait for that little baby lol also on my new list of designing and building is a duel bulb projector that will beam out 4000lm ansi pluss i cant wiat for that to take place either lol I dont know if u have seen it or not but im selling a copy of cad plans for my projector printed out on quality a3 size paper, anyway if u want to know more about my projector dont be afraid to ask
Happy diy
Trev |
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| prjctr_builder |
damn dude, you rock!!!
what is the LCD that you are planning to get? maybe i should consider those car LCD's? you can get a decent one for around $200-$250 and the best thing is that they come with a composite input :) . that eleminates the need of buying a controller board, and since my video card has VGA, composite and S-Video outs, it would be PURFECT for me!!! would it not? the sad thing is that sellers seldom know the contrast ratios of the LCD's they are selling:( .
anyways, if it is not a secret, please let me know what LCD you were talking about (the one that you are planning to get). If it has 200:1 contrast, i think it would work, because i had a top of the line SHARP qa-2500 with 150:1 contrast, and contrast was pretty good, it is the colors i did not really like.....
get back tome me.... good luck...
:cool: |
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| prjctr_builder |
Could you guys tell me how much light (in lumens) an average single ended 200W MH bulb produces? and do they have a nice color to them?
thanks |
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| declined |
Hellow DIY Forum!
Wow... it's been a long time since i've been here... but now i finished my -new- plans (changed them only a zillion times) and i'll start building in a week or 2 when i finally have my MH.
I've read a LOTTA posts here on this forum but one thing still puzzles me: what is the greatest advantage of an MH? is it the low heat output or the extra brightness it delivers? (well the heat thing i kinda read about that but im still not 100% sure if it will be a LOT cooler;) )
I tested my setup with a 500Watt halogen light with a REALLY strong fan blowing on it, but still: my lcd screen seemed like it was gonna melt if i kept the lamp on longer than 5 minutes...
Would a 400Watt MH give me more or less brightness than the 500W Halogen? Or should i buy a 575Watt? Or... would 250 be enough (note: my lcd is rather dark due to its transflective nature :( )
Another thing: now that i finished my rough sketches for the zillionth time i am thinking of redesigning the whole thing -again- upside down, because now the lamp would be on the bottom (which is kinda dumb if i want my PJ to be as cool as possible)
I want the lamp on the top or at least not under my lcd... -sigh- BUT i really dont want any mirrors in my setup because i dont have a clue where to get those special top-coated mirror tiles...
Anyway... I'm back and i will check this place every once in a while :)
yay:cool: |
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| declined |
oh another post for lumen-hungry DIY'ers:
Do you know those enormous sky seeking lights? Those giants that can light up the clouds?
Well... the pyramid-shaped Luxor hotel in Las Vegas has 39 of those on top of the pyramid. They're 7000Watt Xenon-lights. Thats makes a total of 273000Watts!
It's such a powerfull beam, pilots are warned during 30 seconds before the light goes on by a flashing light. You could read a book at 16kilometers altitude.
Just -imagine- what kind of a projector -that- would make
:cool: All you'd need is a couple of huge-*** fressnells and a giant LCD but still... WOW! watching a movie with sunglasses on and probably getting a tan of all the UV radiation ;)
 |
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| prjctr_builder |
| are you guys gonna post or what?:mad: :mad: :mad: |
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| ace3000_1 |
heya bud hows it? i see no one wants to talk to u lol ive been to busy to come here the weekend so thats my excuse lol ok with a 250w mh if u go to diy.org they have a kit that i wouldnt say is too cheap but its got all in the kit if u dont want to hunt around for parts, it puts out about 20000lm and the colour temp is 4200k they are about 150us$ this is the link:
http://people.eecs.ku.edu/~astaples/projector/parts.htm
Trev |
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| ace3000_1 |
hey sorry i forgot the lcd im going to use is coming from another projector i plan on pulling that one apart and retrofitting it into my new box that way i got a nice new projector box and a cheap light source to run it to boot! lol
Trev |
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| prjctr_builder |
thanks for the link to the fresnels. those are the exact type fresnels i was looking for. but i keepwondering, why is it that a larger lens on that website is also the cheaper one, shouldn't it be the other way around?
i looked at the Ballast/Bulb kit, and they seems to have very nice specs and all, but man, $160USD to pay for a ligthsource?!?!? that is rather expensive for a DIY lightsource, especially a 250W one.
also, what is the optimal color temperature that woudl work best in the projector?
tell me if you know a good place to get a MH lightsource, preferably 20000-30000 lumens.
the good thing about the bulb on the website is that it is pretty small, compared to others, and i could completely cover one wide of it with a 5" condenser lens that i am about to get.
the thing tha worries me the most though is if i am going to have hotspots on my screen. if i am going to go with a small ligt bulb and a 15" lcd screen (350:1 contrast), i might have uneven destribution of light on a panel, that makes picking THE RIGHT condenser lens and setting the fresnel THE EXACT distance from the lightsource imperative. omg...:(
so many key factors not to overlook... i hope it'll pay off in the end, after all i already took apart a $300 LCD panel...
get back to me, ACE...
good luck;) |
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| ace3000_1 |
lol the frensels i dont have a clue about in that site i dont charge the prices lol, the bulb price isnt too bad the kit i meant but the bulb is a good price, u can do it cheaper if u go with a magnetic ballast they are not electronic and i dont know where to get one from in the usa as im in spain lol, the best colour temp readyly available is the 4200k colour, thats nice and white and bright and as i said redily available, u can go to 6000k ive been told weather that is too blue or not im not sure but i think it would be ok.
Now with your condenser dont worry about the hotspots that u will or can get out off from the reflector, my experience shows me that the main cause of the hotspots is the reflector not the condensor unless the condenser is damaged or some odd shape that tends to light one part more than the other causing the hot spots, i made a designed a reflector that u can council out the hotspots and is about 90% efficent made out of mirrorised alloy it works great once u tune it and that can be done in about 15mins if u are good , thats counting the light on and off times too.
Trev |
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| prjctr_builder |
i have just purchased a 250W ballast and 250W MH bulb on ebay. it cost me $60 total, and i think that it is kinda better than paying $160 for a system. i think the bulb has 4000K...
will giv you the links to auctions later...
thanks... good luck:) |
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| ace3000_1 |
ahh great deal u got i wish u could have told me about it lol but then again different voltage here so i probally wouldnt have been able to use it, cant wait to see the link
Trev |
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| prjctr_builder |
Additional Information
Color characteristics may vary somewhat from one lamp type to another. Time should be allowed for the lamp to stabilize in color when it is turned on for the first time
or if for any reason its operating position is changed. This may require several hours
Requires a ballast specified or approved for Philips metal halide lamps, or one that is designed to operate all popular brands of metal halide lamps. 1000W types will operate from H36 conventional lag type ballast for Mercury Vapor lamps at ambient temper
Vertical lumens. Horizontal lumens 6%-10% lower.
10% in lumens is A LOT...
why? |
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| prjctr_builder |
http://www.goodmart.com/products/33372.htm
is this a perfect bulb or what?
good luck all...
*****************************************
My PLAN:
Viewsonic 15" panel
350:1 contrast ratio
250W MH light source |
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| ace3000_1 |
heya bud some bulbs run better at horizontal than vertical and vice versa, its best to go out and buy a universal burning posion bulb cos u have very minimal losses thats why lol its just the way they are designed to burn and made for diff reasons and aplications
Trev |
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| ace3000_1 |
hmmmmmmmm that gear u got isnt bad but im not sure if its ideal for the ohp setup lol i hate to see your shipping bill that thing looks heavy as lol the best posion u want for a projector is horizontal the vertical way is too inefficient and makes things realy alot bigger but u got this gear cheap and now u got the gear so get experimenting boy lol
trev |
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| Negative Design |
Im afraid that your setup isnt suitable for OPH retro,
heres mine http://cgi.ebay.com/ws/eBayISAPI.dl...egory=3212&rd=1
I know this works bcuz i dd my research :cool: http://members.cox.net/rolm/update/ (50th time i posted this link yes i know :) )
its a good bulb but not perfect, the perfect builb would surely cost more and give more lumens and be more point source, the perfect bold would be around 5500k-6700k .
Ace you see the ballast in ROLMS site? thats my EXACT ballast, Im not soldering my wiring im using wire nuts ,u can see the wires coming from the outside and see the wire nuts connecting em,
I emailed hello lights AND Alan they both told me i dont need a special PSU to run ( just liek i told u :devilr: )
but ace if i connect my psu i STILL cant test the ballast since i have no socket so its useless to try it now.
I'll c ya lata Bloke |
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| ace3000_1 |
u wana start a fire or what? lol oh man u are crazy what psu? the ballast is a psu for the bulb lol u dont need another psu for the 100th time lol and i dont know what u are saying about testing the ballast with some psu, if u wana test it use a bulb lol or a high voltage and amperage multi meter lol
Trev |
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| Negative Design |
grrrrrrr you know what i mean!:mad: :censored: lol
we've talked about this, you know what im sayin ,to me PSU is the power cord
.......... high voltage amper thingy ma WHO? sorry i dont own one of those..lol
use a bulb...? you say well how can i use a bulb without a socet:rolleyes: magic? lol |
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| prjctr_builder |
guys, i am not actually going to use the bulb and a ballst that i got in my ACTUAL setup. the only reson i bought those is to see if there is even a slight chance that i will get adecent projector using my 15" LCD panel. i am paying 12$ shipping for the ballast... annd yeah, it is kinda big, but i will only use it so set up a prototype lightsource. Eventually, i am planning to hang my projector on the ceiling, so weight is critical, and i will not use that huge ballast, it weigths about 20 lbs or something. in my final product, that is if i will be satisfied with my prototype results, i will use a double ended bulb, with a 250W ballast...
are you saying that MY setup will not work? why not? tell me ahead of time, i do not want to learn that i a about to fail when i will be close to completion...
and actually, i think that having a little lower temperature bulb is a good thing. did you guys read the PEPSI CHALLENGE in the video section? the Halogen won!!! if slightly YELLOW halogen won, then why are we all trying to use the snow white MH bulbs in our setups? maybe a little yellow is a good thing? or maybe the guy's projectors were fu#%ed up?
tell me what you think...
good luck all |
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| Negative Design |
well no one said your setup would fail, i said it MOST likely will not work if your putting it in your OHP, your setup will work if you have a custom enclosure for it...but it wont be as bright as other MHs.
good luck! :) |
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| prjctr_builder |
i AM making a custom enclosure for my projector setup. who said anything about OVERHEAD PROJECTORS? i used to have Dukane 680, and i was not satisfied with the results tha i got.
what makes you think that the image will not be bright enough?
good luck all...:) |
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| ace3000_1 |
well personally i made my projector around a test light, thats just a 150w halogen, i got and learnt how to make the light not only intense but bright also and not to mention how reflectors work, now can u do that with a bright bulb? no unleess u wana cook your eyes out. Ok so having a less bright test light when building custom to me is the go, i have it all tuned and now just need my mh for a perfect brightness and i still got my eyes to watch the movie at the end of it all lol
projector builder dont stress if its not bright enough with the test light just get a brighter one later on like i plan on doing
Trev |
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| ace3000_1 |
6700k is too light blue, if its too light blue it will wash colours out like green and yellow, even if its too white it can too
trev:devilr: |
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| Negative Design |
hmmmm isnt HMI 6700K....??
;) |
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| ace3000_1 |
i dont know im not a ohp freek lol if its is what ohp is made for projection panels? u get all kinds ive even seen some with halogens with a colour temp of 2700k! the only ohp that i know of that is partly made for projection panels is the solar deluxe
Trev:o |
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| ace3000_1 |
ya i will soon but right now im run off of my feet with work
trev |
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| rmccoll |
This is my third projector I've build with this LCD and I'm finally getting every thing together it's a really simple design but it's somethng to start out with. My first two designs were for front projection, now I'm trying a rear projection, because all outside light is almost stopped, your light would'nt have to be as bright and since most of the other projectors build by other people have been huge it's best that the size of it be for a reason.
Like I said my projector is simple it's just the Sony Psone LCD I believe the res. is 960X230 something I don't a thing about contrast ratio or respond time, but it shows fine to me, the controller is almost out of the way, it's connected to the lcd by a short ribbon cable it's at a 90 degree angle from the lcd. My light source is a 75 watt halogen bulb, it can for about an hour and a half before getting a hot spot, I haven't yet added a fan, but I'm going to buy a huge fan and hook it to my projector via a tube so it can blow air into and keep really cool.
My lense has a low focal length is 125mm so it's close to the lcd, it's not in the picture.
I'm not trying to be rude, but the people who are asking where can they buy a cheap 14 to 15 inch lcds, stop being so cheap your going spend money doing this project, lcd are still relatively new so the price it'snt going to drop anytime so,as you can see prjctr_builder has already spent $80 on his setup and he hasn't bought his lcd, so open your wallets a little bit. |
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| prjctr_builder |
why is it that for the past few weeks, no one is posting ANYTHING? did you guys give up?
:scratch: |
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| declined |
OK, maybe I mentioned this before, maybe not, but my LCD kinda broke: 1/3rd of the image is totally messed up. I dunno why but the colors and pixels seem to "bleed" into each other in that part. Does anyone know why this is or how i can fix this?
Anyway: I was kinda ****ed off because it was a pretty good lcd (although it was "only" a car-lcd) Who said in-car lcd's aren't good enough for projector-building?? I think its just fine as long as you dont make the image too large.
As a reaction to my lcd-breaking I started designing and building my "****-projector". This is a design with all my left-over parts. My second, more or less scratched lense, 2 plastic magnifying-reading-fresnels, a crappy playstation "psone" lcd, a 50Watt :cool: halogen mini-spot and some left over bits of wood i had lying around in the basement. Needless to say this is no HDTV-hi-quality-DVD-theatre-setup but the tests showed a nice evenly lit watchable image. Not very bright, but enough in a dark room.
One thing was kinda remarkable: i normally use a 500Watt halogen worklight as testlamp but this small 50Watt minispot seems to be only a bit less bright!! I guess it's because it focuses the light and the 500W spreads it all over the place.
Well anyway: i made some pics during the building process but i forgot the camera at home (i'm in my dorm now) so pics will follow (in a few weeks because im leavingto Spain&Portugal tomorrow :) )
I'll post here as soon as i return!
PS: crappy parts DO work in a PJsetup :) not super, but it does the trick more or less |
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| declined |
Oh yea: i do not intend to watch dvd's through this setup: i have plans for my big PJ which will be high quality... (if all goes well)
I will forget about the in-car lcd and buy a pc-lcd-monitor. I do NOT want to use a pc every time i use my PJ so i'll get a VGA box asap (and if the price is right)
I dunno if there's a thread which shows al usable lcd monitors, but i'll check in a minute. If not: what are the perfect lcd monitors? besides this "benq"-type i heard of? |
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| slize |
after i've finished my first projector, me is gonna make a new one; me is planning to use a panel with 1280x1024 pixels which is sxga!!! gonna built in in my vacations...
some points;
rear projection
sxga resolution
compact
portable
price about
350$ |
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| sgdvd |
i have read many posts on here but none are simple plans, all require dissassembly of a lcd screen- how hard is this without ruining it, and also keeping all the connections-s-video, component etc...?(i would use the psone screen).
saw this plan but after reading many of the posts in this thread and the last one i reckon it wouldn't be very good, but much easier as i dont need to take apart the lcd screen?
please reply. |
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| prjctr_builder |
SLIZE the only point of using an LCD monitor is the fact that they have a higher resolutions and contrast. In your casem you just purchased a monitor with 200:1 contrast. that is very low for a monitor. i am using the one that has 350:1 and still i would like to purchase a monitor with 450:1 contrst ratio later on. i mean what is the point of using a big 15" lcd with almost same contrst as the top panels which have a lot smaller screen?
good luck all |
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| slize |
the point is 1280x1024!!! damnit :mad:
contrast is not so important; don't forget: th emor contrast you have the more light you need to shine through...
i'm gonna tell your dad about this ;) |
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| Negative Design |
| I bet it SXGA compressed...you could of got a norcent with is 250:1 and XGA for cheap :) |
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| ace3000_1 |
slize the more contrast and pixels u have the more light u need to shine though lol just think how manny screen doors are in your new lcd! heaps lol very close together wich means more light blockage, anyway this cant be helped its just part of science but the contrast deffinatley makes a big diff as u say, anyway if this new lcd u got looks **** it would make a nice monitor, u got it for a good price.
Trev |
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| slize |
you bet wrong, it is not compressed; look at the specs in the link i posted below... 1280x1024 is the native resolution...
http://www.pcw.co.uk/Products/Hardware/104470
and ya don't wanna tell me there is a BIG difference between 200:1 and 250:1 contrast ratio ;) for less than 200 bucks... |
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| slize |
look at the pixel width specs at ebay (Punktabstand):
it says 0,239 x 0,239 mm
normaly it is something like 0,29 x 0,29
for me it sounds like there is few light blockage because the pixel width is smaller...
and the contrast is not that important because i can adjust it with Dscaler finally on my pc. I'd rather wanna have more light coming through the panel and less contrast than a contrast of 600:1 and a bad picture because it is too dark... |
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| ace3000_1 |
yeah slize the contrast is the first thing i wind back i hate a pic with a glare or a sheen to it ie:contrast even my monitors contrast is wound back lol i like a sharp bright pic but thats me lol looks like u to bud.
Trev |
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| slize |
| i'll built and we'll see... |
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| slize |
by the way:
don't worry about a sharp and bright picture on your projector; with your mini resolution of 320x240 dots you won't get a sharp picture at all... ;) |
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| prjctr_builder |
Do you even understand what is going on in this forum? As ACE sai, having a highter resolution for a same size LCD displays menas that te one wit higher resolution will block MORE light. in your case, i do not even know why you need 1280x1024 panel? Why would you need to have resolution that high? That is just stupid, because you could have just purchased and XGA panel with a higher contrast ratio and it would surely work a lot better. And if you read up, my panel is 350:1 contrast, and that is 150 more than yours. Trust me, when we show each other the results, you WILL see the difference.
In your case, having SXGA panel is just a waste of light, and production of unnecessary heat from a larger bulb you will have to use. And it is not like any one of us here will use that high of a resolution in our rooms.
And the last thing.... GOOD LUCK FINDING A FRESNEL FOR 15.4" MONITOR :-)
good luck all :nod: hehe... |
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| ace3000_1 |
slize ummmmmm do u know what u are talking about? why wouldnt i get a sharp picture or bright picture with my 5.6inch lcd? i can get more light through mine than yours , concentrated light that is, and as for sharpness that comes down to the lens u use not the screen, u can controll the screen with the contrast setting lol as i told u i have mine set to sharp meaning more light gets through and i get a sharp picture.
Trev |
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| ace3000_1 |
slize my reso is actually 960x240 dots, the reso as in pixels is 320x240 pixels, have u tried a small screen with that reso slize? if u havnt then u dont know what u will and wont get, i bet u dont even know what it looks like on the wall, **** u might asume, well ill tell u the truth its not actually i can watch tv on it no worries at all and just remember as_u_me makes an as out of u and me more u in this case lol
Trev |
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| slize |
yes i have, i used a 5,6 PSone tft (320x240) at first, and it looks like **** compared to what i have now (756x568 PAL)... and i will get 1280x1024 can't wait to see that picture...
do YOU know what you are talking about?
i WILL get more light on the screen than you, because i don't have to enlarge my original picture from the panel as much as you because i use a 15".
Just imagine you want to have a 100" projected picture. from a 5,6 panel the magnification factor is 17,85. My magnification factor is 6,66. That means each dot on my projected image is 2,6 times brighter than yours. so far for the brightness of your picture.
now to the sharpness. nstc format is 640x480 that means you have half of the resolution of nstc enlarged to lets say 10 times bigger... that HAS to look ****...
by the way: i don't worry about enough light, i have a 400W MH bulb with 45000 lumens...
i thought this forum was for ideas and help and not for beeing attacked by some people who think they are heros; i have already built a projector with very good results... |
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| ace3000_1 |
| ok what ever u recon u better tell sony and the other leading proffesional projector companies your theory too then cos they must have it wrong aswell, i realy dont know what has crawled up your *** but i havnt given u any ****, i actually agreed on the contrast thery its obvious u either can read or u cant comprehend, now i am going to give u **** im not going to give u the benifit of the doubt and realy i dont give a **** what u make, u have alot to learn obviously, read the forum like everyone else does eh? your conclusions are way off of the handle and also i may add very wrong, so shut up and think about what u are saying slize, email sony while your at it or a proffessor in science and lets just see if your thery is true eh? give me proof i want to see proof! back your crappy *** **** thery up! until then **** off |
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| ace3000_1 |
| u have a bigger screen area to light up not to mention angled light rays, GET WITH IT!!!! MEANING U NEED MORE LIGHT!!!! |
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| Negative Design |
Slize where did you get a 45,000 Lumens 400 w from, do u have a link?
I thought 400w where 36,000 ..but i can be wrong :)
ace, are in "da Hood" now LOL
hehe you know what i mean...:cool: |
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| sgdvd |
yeah!
can't wait for round 2!
this forum's fun. |
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| rapsac |
This forum is getting better by the day....
The amount of light has nothing (at least theoretical) to do with the dot pitch of the LCD.
GOOD panels with high res. are almost as translucent as GOOD panel with lower res.
In these panels the pixels are smaller (less translucency) BUT they are spaced closer together (more translucency).
Now ask yourself this question: What will be a GOOD panel? A ****** panel for consumer electronics (car/portable dvd/tv player) or a $2000 15" panel?
What you should watch though are the response times (likely to be crappy for the NEC as it is an old panel), contrast levels (also crappy, 200:1 is just too low) and size; 15.4 is just too big for a fresnel. Likely you will end up with a 1024x1024 display. Better go for a good 1024x768 panel with good response times and decent contrast levels.
And I'll say this again: DONT WASTE TIME/MONEY ON ANY PANEL THAT IS USED FOR PORTABLE CE!!
These are all **** in every department!
Watching low res XXX clips and aerial TV is about all they can be used for!! |
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| ace3000_1 |
well mine was my first for just an experiment, some seem to forget that no names slize to see what i got with different lights and lenses, its was a learning curve, nothing for a pernament use, i have posted that before, im getting anew 6.4inch lcd ok its 800x600 native 1024x768 compressed and contrast is 200:1, its coming out of an old infocus lp220 and i have seen screen shots of this lcd in action and i am inpressed, im getting it for $60 so no great loss if its ****, in the future in the near future im going dlp for a second projector or my main movie projector, that way i get both worlds for a reasonable price and 2 small units i have room for.
Trev |
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| rmccoll |
Alot of light is nessecary, but if you can not waste that light with over head projectors because alot of light is lost between the stage and the lens, a custom case would be your best bet also you should choose a lens that a low focal length 150mm to 300mm is best for 14'' and 15'' inch lcds the lens will only have to 12 inches away from the lcd use this equation:
D=F(S/A+1)
D=distance from screen to projector
F=focal lenght of lense
S=area of screen
A=size of lcd
found this at www.3m.com
Hope this can help anyone |
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