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Picture of How to make a small DIY LED Projector
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I been working on this for about some time. I like to do thins that are not to expensive but does the job of something a lot more expensive. I think in this web page you can find lots of people doing the same, and that is REALLY helpful for all of us.

See more cool projects in my blog

 Now you can find everywhere led projectors, some of them are really good, but also so expensive. You can buy a led projector here in Uk for about 100 pounds, but there are not to good, they need to be in a dark room and the size of the screen they project is about 21" witch is not really impressive.

So I thought i could try to make something similar, and if possible a bit better, and obviously a lot cheaper.

Here is the result, using 80 led of 13000mcd. I'm still not to happy about the result, because the light is not even, thats is because the angle of the LEDs do not allow them to be so close to the screen, so i decide to buy one of the new high power led and use it with a condenser lens.

I don't think i have pictures of the whole project but I'll try to gather as much inf and pictures i can to add it here.

Please keep in mind me english sucks and this is my first instructable.

In this video you can see the projector working, but in real life you can see the screen a lot brighter.

                      YO CAN SEE MY NEW PROJECTOR HERE



In this other video you can see the LEDs i'm using at the moment. (80pc 5mm led, 13000mcd) but soon i'll receive the 20w 1000lm high power led from hong kong. I'll post some videos as soon as i get it an try it.



And in this las video you can see briefly the led projector again, I'll try to make better videos and post them.


Thank you for reading and watching, I'll post the making of this projector step by step couse i'm a bit busy
 
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Step 1: All that you need.

Ok, we just see it working, lets see if i can tell you step by step how i done it.

This is all what you need:

-MP4 player with a screen of about 2" (the better the quality of the screen the better the projection will be) Try to get it with AV in, mine does. The price of this may vary depending on the quality. about $60

-Project box. (or any other box you will lite to use, i like this project box because they are strong and they have slots to hold things in place) $5

-An old slide projector lens. $1

-Small fan, i used a 50mm fan (Maybe you don't need the fan, depending on how hot the circuit with the LEDs gets, i put mine because the resistors that came with the leds are not very good and they get hot.)--- i took this from an old pc processor cooler.

-Small switch.--- I took mine from an old PSU (power supply unit) easy to find.

-Power connector.---Just take it from any electronic device that you don't use, or buy one that is gonna cost about $1

-Some cables.---Any cables, you could use cables from the same old PSU

-Fresnel lens (magnified lens)--$1

-LEDs, this one has 80pc, 13000 mcd 5mm--$20

Not a bad projector for under $100 , I spend a little less because i had the MP4 player hanging around.

Now the tools you'll use:

-Soldering gun.

-Dremel rotary tool. (with cutting disk, and sanding bit)

-Some screws to hold the fan in place.

-Hot glue gun.

And that its all what you need to start this project.

NEXT STEP SOON

Step 2: With the high power led 20W 1000lm

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I finaly fit the 20w 1000lm high power led that got today in the post.

Here's the video of the result.. I recommend to use this one because it's more simple to install and the output it's a lot better.



MORE SOON!!!!!

Step 3: Let's start.

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Ok, the first thing to do, is to take the Mp4 apart. and carefully separate the LCD from the circuit.

Then you have to separate the LCD from its casing and remove the backlight. But keep the casing once it's empty of everything but the LCD itself. ( I didn't take many pictures from the process so i took the pictures now when everything is fitted, but if u don't understand, or i don't explain it properly just make a comment and i'll answer asap)

Now you have to cut a piece of anything rigid where the lcd is goin to be, so its straight. I'll make a drawing.

Step 4: The LED Bit

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To do the LED driver, just read how to do it in this instructable, if any doubts just ask the author Artificial Intelligence, he is really helpful.

I know i don't do it all the way right, but i didn't use a LED driver because the 12V power suply i used is a 1,25A and the LED works between 1,4A and 1,8A, and it works between 13.5V and 15V.
So if you really want to make sure you use this LED right I suggest u use a high power LED driver like the one in the intructable i already mentioned. The down bit of using the LED driver is the drop of 3V, in which case you need a power suply of about 18V and then from that step down to 12v for the fan and 5v for the MP4. But all that is doable.

When fitting the LED to its heatsink, try to add some heatsink paste. Just make 2 small holes with a drill (it's best if u make the hole with a drill bit a bit smaller than the screw you are going to use)

In the next step you'll see how to wire the cables.

Step 5: Wiring

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Here is the wiring, with the LED driver, and without the LED driver.

Step 6: Measurements

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Well Done! if you got this far let me tell you something... U CAN DO IT!

This step is very important, now u have to try to get the LED (with it's heatsink), the condensor lens, the fresnel lens, the LCD and the slide projector lens, in line. Pay good atention to the center of everything. and play with the distances between them until you happy with the output.

Once u have the distances 1, 2, 3 and 4 u can calculate the size of the box you'll be looking for.

To calculate the distance 4, try to project the screen size you want. And if u have enuf space it'll be nice if you can retract the lens all the way in without touching the LCD.

Note: Don't worry if u don't have the LCD connected and working, u don't need it working for this step as u will be able to see the dots of the screen in the projected image. Just make sure when fiting the LCD, that the image it shown upsidedown, so the projected image will be straight. what i usualy do is write on the LCD a word (like "hello") when u have it working. that way you make sure the LCD is in the right position without having to connect it all the time to make sure it's right. Just write with something u can erase later.

Note 2: If you're taking a bit of time to do this, have the fan working to avoid overheating the LED.

Step 7: Daylight test


 
I posted a video here with a daylight test of the projector. Also i posted a few pictures, some of the portable battery unit i made for it, so I can project anywhere and some pictures of the new High Power LED i got today from Hong Kong, this one is rated 1800lm and i will be making another projector with it, this time with a 3.5" LCD, a bit bigger but a lot more pixels so hopefully the quality will be better. I will keep you all posted. Thank you for rate an comments.

My second LED projector is finished! You can see here.

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Super Rohit1 month ago
Will this project videos
ChandreshG4 months ago

hey newtonn2 i wanna make a pico projector can you suggest me to built one

the youtube is just posted with videos of a i phone in a shoe bok with a lens ....

how can they even call it a pico projector???????

please help me to make a pico projector waiting for your reply

jubaernet6 months ago

Hello Newtonn2... That is a great job you have done there. I am interested to know what was the total output power of your LED array you used ? And how good projection quality I will get if I use a 18 Watt LED array ? I am looking forward to your answer....

Regards-

Jubaer

jubaernet6 months ago

Hello Newtonn2... That is a great job you have done there. I am interested to know what was the total output power of your LED array you used ? And how good projection quality I will get if I use a 18 Watt LED array ? I am looking forward to your answer....

Regards-

Jubaer

jubaernet6 months ago

Hello Newtonn2... That is a great job you have done there. I am interested to know what was the total output power of your LED array you used ? And how good projection quality I will get if I use a 18 Watt LED array ? I am looking forward to your answer....

Regards-

Jubaer

jubaernet6 months ago

Hello Newtonn2... That is a great job you have done there. I am interested to know what was the total output power of your LED array you used ? And how good projection quality I will get if I use a 18 Watt LED array ? I am looking forward to your answer....

Regards-

Jubaer

jubaernet6 months ago

Hello Newtonn2... That is a great job you have done there. I am interested to know what was the total output power of your LED array you used ? And how good projection quality I will get if I use a 18 Watt LED array ? I am looking forward to your answer....

Regards-

Jubaer

kimpoys9 months ago

hi, I'm a ece student and my thesis now is making a led based projector for smartphone , can i ask sir what are the parts i need for making it..tnx

kimpoys9 months ago

hi, i am electronics engineer student my thesis is making a image projector for smartphone .. can i ask you sir what are the parts i need

KizzyRanatha9 months ago

Can I use a camera instead or the Mp4. I have an Olympus x42 laying around. I'm guessing I will have to make alterations. also my camera has zoom lens and when just filtering light through it the size wasn't bad (can it sub it for the projector lens. I'm a noob but was inspired by your blog) you help is welcomed and appreciated.

books4ume1 year ago

Newtonn2, here is a link to a 3D viewer which can be made very easily, to view Cross eye side by side photos on any regular TV, LCD, LED or Computer monitor.

This viewer is for those of us who find it difficult to cross our eyes to view such 3D cross eye photos and videos. Make one and see how easily you can now view such Cross eye side by side 3D images and videos. Here is the link to the instructable :-

http://www.instructables.com/id/Make-your-own-3D-s...

Happy viewing! :-)

hkerr1 year ago

where did u get the old lense ..... £20 on ebay ;(

akulark20052 years ago
Hi, Newton Its great, I need the help to connect DVD players jacks & from PC to LED ? Please help detailed please
I purchased very cheap LED projector, Now I want to increase its DPI (Pixels) by aditional hardware. Can anybody give me guide how to increase the same.
Thanks in Advance.
coleen072 years ago
Dear mr. newton, Is it possible that u can connect the projector to the computer? Pls answer. Thanks!
cubbydebry2 years ago
Hey I think I've got everything i need for my projector! I was just wondering if this light would be bright enough to project over about 8-feet?http://www.amazon.com/NEEWER%C2%AE-CN-160-DIMMABLE-Camcorder-Panasonic/dp/B004VC8M3K/ref=sr_1_2?ie=UTF8&qid=1345919046&sr=8-2&keywords=high+power+led
Thanks for your good work.
I have an old slide projector that I wnat to turn into video projector, following your instructions.
I didn't find any information about how to connect the projector to a computer...
Is it possible to project something directly from a computer ? How ?
hi i know you have mad a new projector. but for this one if you installed a couple of IR led's next to the camera you would have "night vision" and be able to see in the dark with it. the IR's arent detectable to the human eye either. but im sure you already knew that ;)
mspearin3 years ago
Could you use an iPod touch???? Has any one tried??
MostBrainy4 years ago
hey newtonn2 i hav got everything needed but i hav searched everywhere i cannot find a 10w or 20w i got a 3 watt led but because of wrong voltage input it is now not working now so i hav only a 1 watt led .....is it enough.........and one more thing i cannot convince my dad to by another 3 watt so say anything except that.............................waitin for ur reply soon
newtonn2 (author)  MostBrainy3 years ago

Hi!, I don't think you can use a 3w or 1w LED. To get the screen bright enuf you need something more powerful. I'm sorry you can't get the right LED.
You can use a cheapy halogen light
search on www.ebay.com high power led
dealextreme mate... check there
vov353 years ago
Have you tried using capacitors rather than rechargable batteries? they're basically meant for this application...
newtonn2 (author)  vov353 years ago
Hi there! I haven't try that, good idea, it may work.
dilu3 years ago
dear newtonn pls suggest how can i use lenses, Fresnal Lens (which you mentioned ) and Condensor Lens which one i have..... pls give an idea about lenses.
TACOx33 years ago
Is it possible to use the lens from an old telescope?
I know i don't do it all the way right, but i didn't use a LED driver because the 12V power suply i used is a 1,25A and the LED works between 1,4A and 1,8A


this confuses me a little. you say the power supply is 1.25 amp so for my example we will round up to 1.30 and the led works between 1.40 and 1.80 amps. with these numbers the psu isnt putting out enought amps to power the led. how is it possible that the psu is powering the led without the correct amperage? OR am i getting something horribly wrong.
someoldguy5 years ago
Will an old gameboy screen work for this project
no you need an lcd screen that is capable of playing movies ex; digital cameras, cell phone screens, you get it.
newtonn2 (author)  someoldguy5 years ago
 I'm not sure, I never took one of those  a part. 
my old mp4 player broke is there any other way to do this without the mp4 player

newtonn2 (author)  someoldguy5 years ago
 
You could use another LCD screen. There are some that you can connect to a DVD, VIDEO, etc.. in the comment somebody posted a link with a good LCD, I'll try to find it and send to you.
how a mp4 lcd can connect to a computer or dvd player
ok thx

atselikas4 years ago
can you give a link to buy triplet lens
atselikas4 years ago
Can i use a 20W halogen with out condenser lens,only fresnel lens
katareprat4 years ago
Awesome ! It inspired me to make my own one too :)
I'm currently looking for a fresnel lens. Can you please tell me if this one could do :
http://cgi.ebay.in/Fresnel-Lens-Replacement-Part-4-Nikon-SB-600-glass-new-/140560494012?pt=LH_DefaultDomain_203&hash=item20ba0eedbc

there's also a bigger one :
http://cgi.ebay.in/BIG-TV-100-INCH-DIY-PROJECTOR-TELEVISION-FRESNEL-LENS-/110687737615?pt=LH_DefaultDomain_203&hash=item19c580d70f

I'm asking as my LCD size is different from BOTH of these..so I've no idea if these lenses will or will not do

Thanks for the wonderful 'ible !!:)
exilaus5 years ago
finaly i finish my 1,8"
all photo are there (i need update with projector at work) 
http://picasaweb.google.com/exilaus/Projector?feat=directlink

- wood
- 12v input
- 2 ssc p4
- 2 for 30grad optics low cost from dealxtreme(pack of 10 2,xx $)
- frensel credit card
- lcd 1,8 http://sharonind.com/LCD/LCD018/LCD018.htm
- a part of optics from slide projector
- alluminim 5x5x2 (take from big heatskin)
- lm317 with resistor

in arrive from china : battery pack for cctv 12v 4800ma 230gram for convert it in travel projector
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