😀 😀 😀
Ok guys, I've done it... I realized my first projector, and it only costed 100€!! I'm pretty happy with the results, as soon as I ca I will post some pictures of the setup and results..
By the way, I changed a little the classic small setup. I built it in "inline style" with no mirror, and as source of light I used a 12v 50W dichroic lamp with 8000lm and 3500k color temp.. It's not too visible in daylight, but bright in dark condition.
For objective lens I purchased a 50mm copylens from surplushed with fl of 24cm. I'm using a 4" lcd panel with only 105000pixel, but trust me, the results are pretty good!
Just one thing, I can't get good light in the right-bottom corner, and I do not understand why..If someone can give me a hint..
🙄
Ok guys, I've done it... I realized my first projector, and it only costed 100€!! I'm pretty happy with the results, as soon as I ca I will post some pictures of the setup and results..
By the way, I changed a little the classic small setup. I built it in "inline style" with no mirror, and as source of light I used a 12v 50W dichroic lamp with 8000lm and 3500k color temp.. It's not too visible in daylight, but bright in dark condition.
For objective lens I purchased a 50mm copylens from surplushed with fl of 24cm. I'm using a 4" lcd panel with only 105000pixel, but trust me, the results are pretty good!
Just one thing, I can't get good light in the right-bottom corner, and I do not understand why..If someone can give me a hint..
🙄
you didn't say if you're using any fresnels in your setup. usually, uneven lighting or corners being dark is due to the optics not being properly centered both horizontally and vertically. if its dark all the way around the outside, i'd suggest adjusting the distance from the light to the lcd (or first fresnel) and the distance from the lcd (or second fresnel) to the lens.
hope this helps.
greg
hope this helps.
greg
Thanks for your reply! Yes, I'm using two splitted fresnels, both placed before the LCD as I read somewhere in small setups...
Ok, I will try to get better position for my fresnels and objective!
Ok, I will try to get better position for my fresnels and objective!
hay disa, after reading your post today i went and bought one of the lamps you are using and i must say nice choice it is was better than my 150W halogen floodlight which was causing the lcd to turn invisable, ya know when is gets a bit too hot before it starts burning. ok well on mine i only have the center focused right now that is because the lamp is 18 deg light angle, i will have to make an external light box. are you sure that your not having the same problem? as in the light is too close so its not shining on the whole panel at the britest point of the lamp? if this makes no sence atall please tell me and i will try reword it. but if it does and its not the problem then i dont know what it couls be.
Thanks,
Ryan Edge
Thanks,
Ryan Edge
Hi Bulldog,
yes, that makes sense.. My lamp has only 10° light cone, so if it is too close, the best light is not on the entire panel but right on the center.. I will try to put it a little bit back than now andI will tell you if the problem is solved!
I'm happy you're taking the way of dichroic lamps, as they are cheap, durable, good lumens and, most important, very little heat!!
Oh, what kind of panel are you currently using? I think I'm going to buy one 6" with better reso, as 105000 pixels are not the best for 80" image!! Any suggestion wellcome..
😉
yes, that makes sense.. My lamp has only 10° light cone, so if it is too close, the best light is not on the entire panel but right on the center.. I will try to put it a little bit back than now andI will tell you if the problem is solved!
I'm happy you're taking the way of dichroic lamps, as they are cheap, durable, good lumens and, most important, very little heat!!
Oh, what kind of panel are you currently using? I think I'm going to buy one 6" with better reso, as 105000 pixels are not the best for 80" image!! Any suggestion wellcome..
😉
my panel is a psone screen, its not the offical sony so its not quite as good but even tho i can see the pixles clearly i still like the image, i am currently trying to move the light back some more but have no more room so i will have to make an external light box, i must say 10 deg how far is the lamp from the lcd? mines 220mm and i only get the centre. what panel are you using? i would like one of the lilliput screens but i am keeping my projector cheap, it has cost about £45 so far. how about yours?
Thanks,
Ryan Edge
Thanks,
Ryan Edge
well, my light is approx 25cm away from my two fresnels, but I'm having a quite good "square" output, I mean, you can see clearly the panel shape, just the borders are a little uneven in light..
I'm using a 4" lcd monitor, disassembled from one of those cheap lcd monitor you can find over Ebay.. As now I spent approx 100€=35GBP more or less! The monitor was the most expensive part, 70€!
I would like to try one 6" tft tv before buying one VGA lilliput 7", as it seems to have quite good resolution. Now I can clearly see pixels, but I'm running on a 105.000 pix-based setup.. I found some 6" lcd with 350.000 pixels, so I think it will be better, and of course cheaper than Lilliput VGA!
I'm using a 4" lcd monitor, disassembled from one of those cheap lcd monitor you can find over Ebay.. As now I spent approx 100€=35GBP more or less! The monitor was the most expensive part, 70€!
I would like to try one 6" tft tv before buying one VGA lilliput 7", as it seems to have quite good resolution. Now I can clearly see pixels, but I'm running on a 105.000 pix-based setup.. I found some 6" lcd with 350.000 pixels, so I think it will be better, and of course cheaper than Lilliput VGA!
EXT
Your bulb happen to be a EXT NSP (narrow spot)? I have a 3 pack here. Pretty good they are. I used it for light engine tests from about 8 months back till now. Then uped to a 250watter. Love it. With a cold mirror and 50cfm blower, not really any heat in light path. But without atleast one fan on panel heat builds up in about 20minutes, so im adding a small fan. The panel is ruffly 7" max from bulb. 25o beam. . I can CLEARLY watch it in broad daylight. Had it setup in dinning room today at 3:00pm curtains pulled on 4 windows. And I could read all the text and see all details, good colours on my sat box.Its only a mad catz ps one screen so I will be chaning that later. I can now ablige a larger up to 10" panel with no optic changes. ermmm, Cept the first and last fres of course. And still run a 5"ps panel with same setup! hehe. Will post some pics tommorow. Gonna show whatever my camera can catch. She's about a 4 year old handycam after all. The screen is 30"x40" -sorry its all I got. Any higher this panel looks pixely BUT I can project larger for compairison reasons I guess. Later guys.🙂
Your bulb happen to be a EXT NSP (narrow spot)? I have a 3 pack here. Pretty good they are. I used it for light engine tests from about 8 months back till now. Then uped to a 250watter. Love it. With a cold mirror and 50cfm blower, not really any heat in light path. But without atleast one fan on panel heat builds up in about 20minutes, so im adding a small fan. The panel is ruffly 7" max from bulb. 25o beam. . I can CLEARLY watch it in broad daylight. Had it setup in dinning room today at 3:00pm curtains pulled on 4 windows. And I could read all the text and see all details, good colours on my sat box.Its only a mad catz ps one screen so I will be chaning that later. I can now ablige a larger up to 10" panel with no optic changes. ermmm, Cept the first and last fres of course. And still run a 5"ps panel with same setup! hehe. Will post some pics tommorow. Gonna show whatever my camera can catch. She's about a 4 year old handycam after all. The screen is 30"x40" -sorry its all I got. Any higher this panel looks pixely BUT I can project larger for compairison reasons I guess. Later guys.🙂
My light is a dichroic light, 50w and 12v, not a spotlight! It's very bright, but unfortunately if you want great lumens you have to use 10° light! I also have seen a 24° beam with 5500LM but I think it hasn't enough lumens...
Tonight I'm going to post the pics of my setup!
Tonight I'm going to post the pics of my setup!
sorry disa i missed your last peply, 10 deg at 25cm, seems a bit too short for me, mines at 30cm now and its still dark at the bottom or top depending how you look at it, i was thinking of getting another one so it will fit inside and make it briter. also i was playing around with my smoke machine so i could see the light going to the screen and i foung out that the light doesnt cross over untill its left the lens, it was about 10cm from the lens where it crossed over, maybe you already knew that i just found it interesting, heres some pics i took, its about 45inch.
u can see the low quality here and the bottom is missing, my task bar is as big is it can be so u can just see it
u can see the low quality here and the bottom is missing, my task bar is as big is it can be so u can just see it
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
yes, I can see the problem is similar to mine..
But I've solved it quite easily, I put another fresnel bfore the LCD panel (between light and the other fresnels) and I got very nice light distribution without changing distances of light or lenses! If you have the possibility try this out! Use a splitted fresnel with the ridged part facing to the panel
Anyway, I post here my setup, as soon as I get a better camera I will post the projected image
But I've solved it quite easily, I put another fresnel bfore the LCD panel (between light and the other fresnels) and I got very nice light distribution without changing distances of light or lenses! If you have the possibility try this out! Use a splitted fresnel with the ridged part facing to the panel
Anyway, I post here my setup, as soon as I get a better camera I will post the projected image
Attachments
unluckily for me there is no where to get fresnals around here, i had to buy one of those stupid 100" projection tv things off ebay, so if i want to try it i will have to get another, i am tempted to get another bulb and try it with 2.
Thanks,
Ryan Edge
Thanks,
Ryan Edge
Ok, so let me know how will it go with a new one!
Ah, I'm currently using one of these 100" tv fresnels, just page magnyfers!! I'm using these because it's not so easy here to find good fresnels (and cheap) and also because been before the panel, they work just as light "boosters", so no need to be good quality!
I'm posting results taken with my mobile phone with lights on, so no quality at all!!
I have one more question, do you have good contrast there? I mean good colors? 'cause my "blacks" seem to be washed out, like a dark grey..and so I can't get good contrast! I think it should be a problem of light lacking..
So keep on taking alive this thread, for whoever wants good hints on small (and very cheap), satisfying setups!
Cheers
Marco
Ah, I'm currently using one of these 100" tv fresnels, just page magnyfers!! I'm using these because it's not so easy here to find good fresnels (and cheap) and also because been before the panel, they work just as light "boosters", so no need to be good quality!
I'm posting results taken with my mobile phone with lights on, so no quality at all!!
I have one more question, do you have good contrast there? I mean good colors? 'cause my "blacks" seem to be washed out, like a dark grey..and so I can't get good contrast! I think it should be a problem of light lacking..
So keep on taking alive this thread, for whoever wants good hints on small (and very cheap), satisfying setups!
Cheers
Marco
Attachments
Its a EXT then.
"My light is a dichroic light, 50w and 12v, not a spotlight! "
Errr, when did I say it was? Its a EXT bulb description 12volt mr-16 NSP 50watt dichrotic reflector (just means multi color). Which means the beam type is Narrow spot beam. I.E. tight colimated beam at 13o or atleast mine is. LOL. Its commenly used in jewler's counters.😉
"My light is a dichroic light, 50w and 12v, not a spotlight! "
Errr, when did I say it was? Its a EXT bulb description 12volt mr-16 NSP 50watt dichrotic reflector (just means multi color). Which means the beam type is Narrow spot beam. I.E. tight colimated beam at 13o or atleast mine is. LOL. Its commenly used in jewler's counters.😉
sorry Altec!! 
humm... i'm pretty sure that when the blacks start looking grey it means too much light it passing through the lcd, i had a similar problem when i started, the lcd worked fine as it was when i got it but once in the projector i couldnt see any image, i ajusted the colour pots and got quite a nice image, i'm thinking about trying it again as it doesnt look how it should, but of course black is created by turning the pixles off itsnt it? i know thats how it is on a tv but on an lcd it might be different, but thats all i can suggest, try darkening the pots a bit and let us know.
Thanks,
Ryan Edge
Thanks,
Ryan Edge
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