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Old 26th December 2006, 05:53 AM   #121
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Join Date: Oct 2006
Hi rensenin,
Iam basically from madurai but currently living in colombo.
I whould suggest you go and look around for those LCD TVs that are ment for cars (7"/8"). If you know any OHP service centers then you can get some lens from them too. You can also try lensel from pune (yet to get a reply for my email ).

Actually it all depends on your budget.... All the best and have fun.
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Old 26th December 2006, 10:13 AM   #122
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thanks ilango,
will defnitely check out with lensel in pune. hows yours coming up. did you happen to complete it.

Can you send us some pics of your projector
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Old 27th December 2006, 03:59 AM   #123
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Mine is not ready yet. Have to import almost everything here Trying my best to get as much as possible locally... As of now I have only the LCD ready and stripped. I have an 9" from a laptop and a Benq 15" both ready for the proj. If I can replace the hard disk of the laptop my proj will have a builtin computer
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Old 27th December 2006, 10:37 AM   #124
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Default where to get freshnel lens

hi budhi

i am very happy for your projector you made i am very much interested to made projector but i don't know where to get ohp freshnel lense and projection lense. basically i am from faridabad DELHI NCR. so pls help me to get these items.


regards

harish
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Old 29th December 2006, 03:54 AM   #125
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Maks0001, How is your projector ??? Any updates??? Iam still not getting any reply from Lensel !!!!
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Old 29th December 2006, 10:43 AM   #126
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Quote:
Originally posted by ilango_slk
Maks0001, How is your projector ??? Any updates??? Iam still not getting any reply from Lensel !!!!
Hi ilango_slk... my PJ is almost done, except one obstacle that I need to overcome. I'm not sure, but I guess the UV rays from the lamp are causing some trouble. The LCD has a big foggy patch on it and starts waving when I put it ON. The colors in the patchy area are also faded and the image looks washed out. If I take off the mirror (i.e. no light on LCD) and put a torch behind the LCD, it's just fine. No patch neither any king of waves. But the moment I put the mirror back and bend the light to project through the LCD, it's the same story again. The heat is definitely not a problem as there's adequate cooling system in place and the LCD remains cool as such. Last weekend I went hunting for UV filter film - the one that is installed on car windows. But there was no vendor who would sell a small piece of it. I managed to get a cheaper one that was available as per the size requirement, but that does no good (and I had expected it). It's a three days holiday starting tomm... will try to fix the problem during this weekend. Any clues from fellow DIYers..???
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Old 29th December 2006, 10:46 AM   #127
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Quote:
Originally posted by ilango_slk
Iam still not getting any reply from Lensel !!!!
btw, Lensels are bad at responding to individuals. I got a response from them (with an apology for the delay) only after 48 days.... and by this time I already had the set of Lens arranged (from Lensel itself) with the help of Maestro.
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Old 29th December 2006, 01:43 PM   #128
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Maks, not sure when businessman like the ceo of lensel will wakeup to the online business. If they can have a website and an email address how difficult is it to reply an email?????

I think I will order them at 3dlens.
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Old 2nd January 2007, 05:47 AM   #129
budhi is offline budhi  India
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Default Wavy Lines problem

Hi Maks, I Think I can solve your Problem of wavy lines.
Lets go step by step!
1. make sure your project is grounded well >A three pin plug is a must for all projectors. If you are using a wooden cabinet then you need a sheild of some sort around your metalhallide switchgear (perforated metal casing) this unit like any tubelight ballast (choke) emits a lot of interference which can give you wavy lines.

2.The powersupply for the Lcd screen should be isolated from the lightsourse by powerline filters.
an easy way to do this is if your lcd screen uses a 12V power adaptor dump the one that came with the screen and get a 12V adaptor meant for scanners these have a built in fuse and line filter just near the point that goes into the unit. this filters out most of the powerline irregularities.

3.Like in all audio and video projects sheilding the signal is very important get good quality connectors and cables that do not pick up interference.

Your projector is almost done, as you say you can see a clear picture when you use a torch for the source, its your lightsource hum and noise being picked by the LCD they are extremly sensitive to this, so sort out these few things and rock on .
Hope this helps bro.
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Old 2nd January 2007, 08:49 AM   #130
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Thanx a Tonne, Budhi.... I must appreciate your help and the systematic approach. So, let me too reply in the same order.

1. Being from the Electronics background, I have always known the importance of Grounding and sheilding. My projector is does have a three pin plug and is grounded well. Yes, I am using a wooden cabinet and the lamp is fitted inside the metal enclosure (please see the attached pic).

2. As you can make out from the attached snap, my PJ is a folded design. It has lower and upper partitions. I have mounted all the power supplies in the lower partition and all electronics in the upper partition. But yes, I can give it a try by getting a scanner PS as you have suggested.

3. I have used the best available connectors for signal inputs. They are gold plated and has cost me a good amount of money. The cables too are good quality shielded cable and I have taken enough care to cover the solder points.

But anyways, I think I will give it a second shot and emphasize on the points that you have recommended. Thank you once again... will bug you if I need any further help.
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