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Step 7Daylight test
My second LED projector is finished! You can see here.
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My second LED projector is finished! You can see here.
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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.
Question: would using 2 of the high powered leds double the lumens and would you foresee any problems with doing that?
Thanks!
i am thinking doing this project,, but! i am too new with this :)
can you tell me the links on eBay were you bought the LED, the lens and so on ?
thank you!!!
The lens came from a slide projector.
And the LCD came from a mp4 player.
how hot that will be and with what kind of cooler i need to add to it..?
also i don't understand why i need a driver..can i just get dc power that fits and that will do ..?
The driver control de flow of electricity as well as the voltage which it will make the LED last longer. In my projector I did not use the driver, I just got a power supply with the right voltage and amps for the LED and so far so good.
take a look at this sketch i made - the tablet stands in A4 paper size (standard printing paper) - do you think the parts will stand , i mean the distance between the lens, the mirror, ext ...is it ok? do you think i should drop the mirror and just do it straight .
correct me if i am wrong - Thank you very much for your help!
About the mirror, if you can fit it it will allow you to get the lens closer to the enclosure. I thing you should be able to make it even in an smaller enclosure as an A4 seams a bit big for me. In any case once you have everything, give a try and you'll see how big or small the enclosure need to be.
but if you say no need than what do you think the distance should be between the led to the the fresnel lens ..?
BTW how hot do think your 20W led is about without the heat sink -?
something else about your project here.. i pay attention that the Projection screen corners are slightly rounded and not squared as your other project that you made using an OHP.. is it the projector lens or do i miss something ?
THANK YOU so much - you're great help !
If you have already the templated glass you can use it. The LED will get really hot without the heat sink, I would not use it without it. What I would do is try with a heat sink for the LED and with no templated glass (as the templated glass will affect the brightness of the projector), If there is not more than 30 C in the LED, I would not be worry about the temperature.
The round borders in my LED projectors are down to not have enough space to separate the LED from the LCD. I made everything b4 replacing the 80 small LED's for the 20w high power LED and I did wanted to keep it small.
what about the led , the lamp ext .. any links to eBay ?
another question if i may ask, is your mp4 support IN video composite..?
most of the simple mp4 goes only with flash memory and not with in video composite.
About the rest of your questions, everything is on my instructable.
The Mp4 player support video composite in. There are not many with that feature, it was build to be able to record to the internal memory from the composite. Sadly the mp4 I used is not longer available. But if you look in the comments I did find one, and it was from HK I think. See this one.
i think i would go for 3.5 inch lcd video monitor it has video in too hop that will work.
btw .. i just looked around for led and i found a led with - 50w white 4000 lumen. - for 25$.is it possible? and does it realy give this effect?
here the link :
http://cgi.ebay.com/High-Quality-50W-White-4000-Lumen-Save-Power-LED-F-S_W0QQitemZ270495360632QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item3efac7a678
about the led..well the led itself as you see cost like 25$ but when you buy together with the LED driver -is another story..(130$) any idea how to get a dc power that fits that kind of led..don't tell me to build one - NO WAY ..lol
a led, a heat sink with fans, a broken lcd mp4,two unknown focal length lens( a convex lens & fresnel lens)
and im planning to buy another mp4 as follow,1.8" 160x128,
do u think its work?
please give me some comments and suggestions,
thanks a lot=]
so did you buy that LED from shen shui po?
i saw that too in one of the stores there.
but i found it really expensive. i guess it should be a 20W for that price. (another assumption is that it works between 12V to 14V with 1.X A. then that should add up with a rated power of at least 20W ) . you'd better ask for the maximum current allowed. that's crucial. it'll drive you crazy if your driver burns the expensive LED. though you'll be able to save part of those chips inside if you act quick enough.
i went to shenzhen with my friend an bought a 20W LED for just RMB$90 with the condenser lens. but if you go there make sure you got lots of stuffs in your shopping list to balance the transportation fee to shenzhen.
yet i bought a brighter 30W from ebay and it costs me around HK$280. i've finished the whole driver for my player, led and the fan and pack them in a PCB. and that works well too. and i'm waiting for the projection lens from the US. hope it arrives soon so i can start the installation. here's the picture of my driver set and the after-connection. and again thanks for newtonn2's instructable and his inspiration. cheers =]
i did really buy it from shen shui po,haha
it cost HKD$99 each, it has 9 chips inside, and they just told me work at 12v,
thanks for your advice,i will go ask them again.
besides, could you teach me how you make the circuit ?(it would be great if you also know how to make it work with rechargeable battery too)
on the other hand, what mp4 are you using?
infact, i want to make the projector size as small as it can, but its hard to find a mp4 lcd which is under 2" with not bad resolution.
thank you very very much for your reply and teaching,(specially with those photos).
also, thanks for newtonn2's instructable. =]
the mp4 i'm using was the 4.3" 'ainol'. it's expensive but it got whole lot more pixels then an ordinary 4.3". i don't know if the whole picture could pass through the projection lens but i'm just trying to make it happen. if that doens't work i'm gonna buy a 2.5" to 3" one. i guess 1.8" will not produce a satisfactory result. (unless u really enjoy the 'pixels' =p) i assure u that a 3 inch screen won't be too big. btw why do you wanna use rechargeable batteries?
just a suggestions, search for more on the net =p