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Old 21st February 2012, 04:02 AM   #1261
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Join Date: Jun 2011
Thnks keimjay

Can I make projector with One Fresnel Lens?
Is it be feasible with one fresnel lens?
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Old 26th February 2012, 06:07 AM   #1262
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Join Date: Sep 2011
with one fresnel??no.
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Old 28th February 2012, 11:54 AM   #1263
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Join Date: Apr 2010
Default LED projector

Hi,
Has anyone built a good LED projector with atleast dvd resolution in India?

If yes, could you help me build one? What parts would I require?
Reason for choosing LED as light source instead of MH is wattage and heat! 400W MH works too hot and also adds electricity costs.

Anyone? Is the viewing experience worth the effort?
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Old 5th March 2012, 12:25 AM   #1264
keimjay is offline keimjay  India
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Join Date: Sep 2011
Location: chennai
Hi
I am from Chennai, made a 15inch LCD PJ, and the results are excellent. Good colour rendering, etc., with MH250W. ONly problem is the size, neither able to fit on top or floor mounting.
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Old 10th March 2012, 10:49 PM   #1265
actor is offline actor  India
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Join Date: Mar 2012
hi maks..... can you tell me the price of fresnel lens from lensel optics and how can i order this lens..........please tell me
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Old 11th March 2012, 01:56 PM   #1266
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Join Date: Sep 2011
just mail to lensel....they will mail back to u...
its really very frustrating being in india...no diy material available...and in case u bring from other country...custom officials dont even understand whats the use...
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Old 14th March 2012, 08:57 AM   #1267
keimjay is offline keimjay  India
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Join Date: Sep 2011
Location: chennai
Hi Projsenjit,

Its now time to move to some other country...... just for this pj
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Old 15th March 2012, 04:13 PM   #1268
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Join Date: Sep 2011
Location: thrissur,kerala
hi innocuous, am also trying to build a led projector i found some useful links frm ebay including lcd and other parts i hope it will help u (i am also going to buy these frm ebay)

1.lcd- 7" TFT INNOLUX AT070TN83 V.1 40 Pin LCD Screen Panel Module Controller 800x480 | eBay

2.condesner lens - 100W LED convex lens optical glass condenser lens 75mm | eBay

3.lcd2-[url= http://www.ebay.in/itm/5-6inch-TFT-LCD-1280-800-HV056WX1-100-plus-7in1-board-/300615755651#ht_3970wt_905 | eBay[/url]


The same lcd are using in diy projector Philippines (by sir hertzblaster)
and for led light engine u can find any led suppliers from local market.and for heat sink am going to use a transistor heat sink from a public announcing system amplifier it can be easily available in local electronic shop for cooling add two computer fan or smps dc fans from junk or
u can use water cooling system (i don't know more abut water cooling ) . if u are going to make a led projector with long throw u find lenses frm india . for short throw i recommend optolife it is safer.

all the best for u r project !!

Last edited by akhilkumarcs92; 15th March 2012 at 04:41 PM.
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Old 15th March 2012, 04:35 PM   #1269
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Join Date: Sep 2011
Location: thrissur,kerala
hi actor ,
for fresnel lenses u can go for lensel opticals pune the pice list is below

"SINGLE FRESNSEL LENSES – NORMAL Size : 285 X 285mm (Squ.)
Focal Length : 340mm
Thickness (mm) : 2 mm- 500 inr

"SINGLE FRESNSEL LENSES – NORMAL Size : 285 X 285mm (Squ.)
Focal Length : 220mm
Thickness (mm) : 2 mm - 500 inr

SINGLE FRESNSEL LENSES –
A4 SIZE
Size : 310 X 310mm (Squ.)Focal Length : 340mm
Focal Length : 340mm
Thickness (mm) : 2 mm - 500 inr

SINGLE FRESNSEL LENSES –
A4 SIZE
Size : 310 X 310mm (Squ.)
Focal Length : 220mm
Thickness (mm) : 2 mm - 500 inr

Fresnel lens
Size : 480 X 640mm (Rect.)
Focal Length : 600mm
Thickness (mm) : 4 mm - 1650 inr

FRESNEL CONDENSER LENS (FOR NORMAL OHP) :
SIZE : 285mm X 285mm
FOCAL LENGTH : 216mm&343mm
THICKNESS : t = 4mm
PITCH : p=0.5mm - 1000 inr

FRESNEL CONDENSER LENS (FOR A4 OHP) :
SIZE : 310mm X 310mm
FOCAL LENGTH : 216mm&343mm
THICKNESS : t = 4mm
PITCH : p=0.5mm - 1000 inr

TRIPLET LENS–THREE ELEMENT PROJECTION LENS
(a) BARREL DIA :74mm
(b) F# 5.2
(c) EFL 317mm - 2320 inr
(d) Heat-resistant Plastic case
(e) Specially coated lenses for optimum sharpness and brightness
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Old 16th March 2012, 06:36 PM   #1270
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Join Date: Oct 2005
Guys,

There is a shop at moormarket chennai shop no.375, owner name is manohar.

He is having all type of second hand lenses with cheap price.

I got 2 ohp fresnel lenses, condenser lens and a triplet lens too...(most of them at Rs150)

Those who are there in chennai... it is a must visit....(old RC toys also available there...)
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