Instructables

In this Instructable, I show you how to make a LCD projector with a LED as the light source. I tried to make videos of everything so it is easier to follow the steps.

Este Instructable esta en versión en Español 

See more cool projects on my blog.

  After making my first LED projector that you can see here , I had lots of questions and people interested in the projector. Some of them went ahead and did something similar like mcastles. 

I felt sorry that I could not give more details of the making of the projector. Also the MP4 player that I used is not longer available so many people could not find an MP4 with composite input like mine.  I decided to make another one, so you could actually SEE how to do it.

This type of projector is very energy efficient. It only consumes about 41W. A normal projector with metal halide lamp will consume about 260W plus a DVD player which can consume between 20w and 45W for a total of about 300w. That is a saving of a lot of money by the end of the year. Although the quality and brightness of a conventional projector will be better, you'll have to pay the price, and the environment as well.

Another good feature of this projector is that the LED should last about 10000 hours of use wile a conventional projector lamp lasts about 2000 hours.

Lets see the result of making this projector.



 
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willianmp29 days ago

I have a very old camera panasonic m7 and running, I wonder if I can use the front where the lenses are. Has manual adjustment of focus and altomatico. If she will will work by sending light with good quality in my projection.

IMG_20140922_102806.jpg
rajivshahi1 month ago

has anyone tried to use amoled screen and any success ????

Mega_Hobbit2 months ago

Hello,
Thank you soooooo much for your tutorial :D It's been fantastic! I've almost almost almost finished with it - I literally need to wait for one lot of glue to dry and glue something else then I'm done. That's it, poof! Earlier you said "send me a video of your finished product" so I will tomorrow. Cause glue drying... eh. But seriously I can't thank you enough for providing me with weekends of fun :D

wannado3 months ago

Hi,

first to say great job!! On the projector and instructions as well. But...i am stuck :) and hope you could help me out a little. I am confused regarding fresnel lenses. Where to put them? 1st image shows one lens before and one after the LCD but you put them together and put them before LCD(before would be LED side, and after lens side). And how close should fresnel be to LCD?all the way, or?Thx ;)

newtonn2 (author)  wannado3 months ago
Thank you very much. You can add the two fresnel lenses together before the LCD screen. If you want to adjust keystonning you need to separate them and have one b4 and the other after. You need to adjust the distance, but not to far really. I always give it a rig test before thinking on the side of the box.
wannado newtonn22 months ago

Oh thanks..now it makes sense. I will skip keystonning for now...I just want to make it work first :) and the image will be in the same level as the projector so i want to make it as simple as possible. Thanks again for all the help!!!

btw. i got my eye on ATX power supply as well. :). i am in great need of one of those. Great job again!

cheers

Mega_Hobbit3 months ago

My lens flips the image and I have no Idea why? Is that normal?

Mega_Hobbit3 months ago

Do the mirrors have to be cut to a certain size? Like if I have my 10" panel will I need a 10" mirror?

Mega_Hobbit3 months ago

I'm gonna try this with my 10" 1366x768 monitor and 50W LED but do you need one of those massive lenses or can you just use an OHP lens?

newtonn2 (author)  Mega_Hobbit3 months ago
Hi there!
That's cool, please share some photos once you have ir working.
You can use an OHP lens. Just make sure it is a triplet lens.

Well at the moment I have the lcd sitting on the OHP and it seems to work ok but it's a bit dark. I'm also already using the LED. So I'm thinking it should work - thanks for all your help :)

h1s0k46 months ago

I'm going to make my own with a 7" 1280x800 LCD , that must be a challenge ! Thanks for your sharing !

mijetjosh957 months ago

how much did anyone pay for the stuff

nerd74739 months ago

Cool I like this instructable very inspiring

got mine working. but due to this being 330mm fl lenses you have to place it verry far away to get a decent size projection. how did you fix it or how can i ?
newtonn2 (author)  siemenwauters1 year ago
Hi there! I'm glad your projector is up an running. The best thing to do would be to replace the lens. The lens I used is a varyfocal length.

I hope you can find something suitable.

Regards
I am going to build this, but i just need help with the lens.
I want to know if this lens will create a decent size projection and throw range.

http://www.ebay.com/itm/Epson-LCD-Projection-Lens-For-Experiments-DIY-Home-Projector-Glass-Lenses-/181075380111

if not, can you please post a reply with some sort of specific lens to look for or give me advice, Thanks!
newtonn2 (author)  Sunny013319 months ago
Hi there. It is difficult to tell just looking at the picture, they did not give any info. Mine is an LCD projector lens, so for that price I would give a go an try.
What is the size of your LCD?
Its quite big at about 7in. Should i try for a smaller screen, or is there a way to make it work with this one?
i dont have as much luck as you do i guess. the image is real sharp just not verry bigg.
rdeimantas1710 months ago
It work with this http://www.ebay.com/itm/A4-Size-Desk-Type-Magnifying-Glass-Fresnel-Lenses-Magnifier-for-Read-Book-/121189956022?pt=LH_DefaultDomain_0&hash=item1c377bf9b6 ?
Peace17391 year ago
Dear Newton2,

Excellent work and congratulations! your project has made me to pick up my old physics books :D
I am planning to do make one for myself, please can you help me with some queries when you are free?
1. Do we really need fresnel lens (say it is a single piece), if yes, do I need to place in front of the LCD?
2. If I go with a LCD controller kit with HDMI input port, can I have my iphone/laptop connected so it takes input from these sources?
3. May be a stupid question, are zoom lens & projector lens same?

Many thanks.
I found condenser lenses that are coupled with diffusers to collimate the light. It seems like using one of these would eliminate the need for at least one of the fresnel lenses. Does anyone know if this is true? http://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=5812
Hi, I am planning to use this instructable as the basis for my own project and have a couple questions. 1. Do you know if it is possible to project through an AMOLED screen instead of an LCD? I was thinking to disassemble a used Zune HD, because it will be really easy to reuse the audio components as well as the screen. 2. Instead of using all the individual capacitors and resistors you have listed above, can I just use an LED driver power supply? There is a good pairing on Ebay of a 50w 5000+ LM LED and driver here for pretty cheap: http://www.ebay.com/itm/Warm-White-50W-High-Power-LED-Light-Lamp-Chip-LED-Power-Supply-Driver-/310749765128?nma=true&si=xtTjwKCaAYkPXWlHUNacmZTeWCw%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557 Thanks!
newtonn2 (author)  jonnyglobal1 year ago
Hi there!

I don't think you can use an OLED display unfortunately.

The best thing will be to buy the LED driver.

Regards
i have made one but the projection size is same as lens size
help plzzzzz
chiopra1 year ago
can u help me ? i am using PSP LCD , the light coming from led just stops when it reaches the LCD screen . what should i do ? help me
kunalsun1 year ago
Hey newtonn2, Thanks for this great instructable. I tried this about a year ago and ran into a lot of trouble with it mainly the light source. But i finally have time to go at it again. One thing the only 30w led like yours i can find on ebay are of 34-36V and the circuit that you have given with all that on there it does not provide that much voltage for the light. Do you know of a way i can get the voltage up to that much? Also i had trouble finding a fresnel lens but i will try to find one this time through a overhead projector. If you could just help with the light source problem that would be great.

Thanks!
skrumbah1 year ago
I've got a couple of questions. When placing the fresnel lens, do you use two of them like in the diagram and sandwich them over the lcd? Also in the condenser lense suppose to focus or spread out the light?
wucke1 year ago
Hi newtonn2, thank you for fast answer. I have one more question, and I need to hear what do u mean about this thing. I have a chance to buy this projector very cheap (about $7,8), and of course i need only parts for doing my own projector. What do you think about LCD in this projector and lenses in it?
http://www.hcinema.de/pro/anzeigen.php?angabe=philipslcp5100
newtonn2 (author)  wucke1 year ago
If you can buy it so cheap, get it! You may be able to use some parts. I'm not 100%, but the LCD may be very small and that's a good thing.
Regards
Newtonn2
hey newton! awesome project. ive started it but i am stuck with the schematic of the av connector and usb connector. Do you have a schematic of where these two get wired to? Much thanks!
wucke1 year ago
Update> That "circuit" I need is Logic-Board from original LCD :( So my question is if it is possible to connect this LCD to another logicboard from some other TFT monitors or LCD's??
newtonn2 (author)  wucke1 year ago
Hi Wucke. Unfortunately I can't help you, I don't know if you could connect it to any other circuit. The best thing would be getting a complete lcd monitor to do the projector.

Regards
wucke1 year ago
Hi newtonn2, first sorry for my bad English :) I am really happy bcs this is the last web site that has active theme about DIY projectors. Your work is great, and again I want to make projector (I have one which is made from an old OHP and LCD 15", but that is too much big and heavy, as you know :). I found one TFT 7", as you can see in picture below, but I have a problem.
http://www.instructables.com/files/deriv/FLN/IY1N/HEBN9JI6/FLNIY1NHEBN9JI6.THUMB.jpg
Is there any way that I can connect cable, which is number 1 on the picture (sorry I dont know English name of that cable), whit some circuit (bcs I dont have original circuit of that TFT)? And if it would be possible, I need to connect this projector to my computer for playing movies, so i need TV out, or VGA/DVI output. Once more, sorry for my bad English :)
IMG_0077.JPG
This DIY projector os very cool You can try a new DIY projector using mobile phone
tini_12981 year ago
what is that beside the first mirror with the wires coming out
tini_12981 year ago
how do you connect the projector to pc
tini_12981 year ago
what can i do to add a hdmi port and a separate audio jack
tini_12981 year ago
will this one work i want to work on it and i m just 15
http://www.ebay.com/itm/Piece-Senior-Anastigmat-Camera-Lens-F-4-5-75mm-No-3276-/370638746652?pt=LH_DefaultDomain_0&hash=item564bca741c
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