DIY LED projector

i have seen the projector instructable from newtonn2 and now i gonna try to made one for my self this is not a comlete instructable (yet)
before i begin, im from belgium and i can a little bit english but not much i try to use google translate not to much because i like to learn it by myself
 im not very experienced i know  the basics from electronics
and if you like to know i am 15 year old  and please do not comment that I'm too young to make this, i have done more advanced things but i have not any experience with lenses and optical things like the lcd that i gonna use
and please do NOT comment that i copied newton2 his work im just a fan of him that want a cheap projector :p
thanks for reading this and i hope you enjoy my instructable

 

Step 1 The idea

wel i have seen the instructable from newtonn2 a while ago but i had the know-how to make that time now im now much more about electronics so i was begone thinking:
mmmmmmm what can i do with a projector?
i could watch moevies with it 
i could connect it to my laptop and play some games 
but the coolest thing that i could do with it is that i make a giant touch screen with my laptop the projector my bluethoot dongle a wiimote and a ir pen
well i tested the wiimote thing alredy and it works however and  now it gonna sound a litlle bit stupid: but i not have sucessfully made an ir pen and i could not test it with my camera because that old thing dont have nightvision or someting else  where i can see of the led actualy work i have tested it so far with the tv remote :P
thats wy i wanne make the projector  and of course becaus it is pretty cool

Comments

[henrylol]

Hail TVmaster,
First of all,
I'm happy to see that someone is trying to build a projector with these Dextreme 30w Led too. Everyone told me that wold never work but i still believe that it does.

I haven't finished mine, so I may be talking bullshit but understand this as tip.

I saw that you bought two fresnels with Focal length of 120mm and in wikipedia they say: "Fresnel lenses of different focal lengths (one collimator, and one collector) are used in commercial and DIY projection. The collimator lens has the lower focal length and is placed closer to the light source, and the collector lens, which focuses the light into the triplet lens, is placed after the projection image (an active matrix LCD panel in LCD projectors)..."

So this might be problem.?!

The other thing could be both Lens facing the same direction acting as a Collimator. But I don't believe that is what happening.
Just guessing.

Good luck with your baby. ;) http://bhlens.com/image/OHPfresnellensdrawing.jpg

[tvmaster]

thanks but i am stopped the project to buy a tablet (i did say this in the main part of the instructable by the comments
sorry
i did had a few problems with the fresnnel lenses but i just played with the distances and everyting was good
but i gonna sel everyting for a tablet

greeting
tv3master

[cocodario]

Are you doing the projector? Did the LCD arrive?

[tvmaster]

im sorry but i gonna stop with it, i dit not ordered the lcd
i gonna stop because i want a tablet pc it is more importand for me beause my laptop is not very mobile anymore
and I'm selling everything I have purchased to get the money for the tablet,sorry
but I do not know yet whether I leave the instructable or not
what schould i do, set it offline or leave it?

greetings,
tv3master

[cocodario]

where are you?

[tvmaster]

how do you mean?

[cocodario]

triplet lens.

[tvmaster]

i dont kow ether
i have tested it today but it dont change anyting to the light beam
mayby i did used it wrong

[tvmaster]

i tryd it again an dit made a diference so i think it work

[cocodario]

good!

[cocodario]

i would buy the same lens, but I don't know if it works...

[tvmaster]

wich lens do you mean?

[cocodario]

Did you receive the screen? I'm interested in your projector.

[tvmaster]

no sorry i dont have it yet

[aekara]

@anhoter: question how far should i place the fresnel from the lcd ?

it sould be 1 to 1.5 cm but not closer than 1cm or longer than 2cm

[tvmaster]

sorry but i dont now that, i gonna need to find it out self
i recieved the led the regulators and the lens for the led today
but stupid enough i burnt out my power suply with the led, the led is luckly still ok
but now i cant test the optics and i dont have a backup power suply so i must search for an laptop charger with enough current and enough voltage but i dont have one in house and i dont have the money anymore to buy one :(

[aekara]

thats sad :(
if your LED is not black or anything like that then its still working
also remember never to test the led without the heatsink on and also never give the led more amp's from its maximum

[tvmaster]

the led is still ok the worst thing that could happen is that the led broke but luckly its ok
i have tested the led not longer than 10 seconds because i dont have heatsink paste stuff

[aekara]

hey i have also made a projector with a 30w led and i used a smaller heatsink and i have no problem with it the maximun i have run the projector was 2hours for a test and the lcd was about 25-30 C so yeah dont worry about that
also the temperature depent on how many current you will give to the led so if you over do it (like i did) the led will be burned

[tvmaster]

have youy used also a fan?

[tvmaster]

and how dit you drive the led?
please help me i dont know much about this kind of led

[aekara]

yep i used a big fan becouse my heatsing is small
well i had started making a led driver but couldnt find some regulators so i bought a 12v 1.2amp adapter and it still works
also i saw that your led is difirent than mine
your take 24volt but less amps
if you have any other question please ask ;)

[tvmaster]

no mine led is 16 volt minimum and 2.1 amps
i dont have questoins at the moment but when i finally can start they will come :p

[thegeeke]

First of all, I really like the fact that you want to learn English rather than using a translator. Good for you. Most kids in America these days will do the easiest way possible rather than actually learning anything.

Secondly, instead of publishing an incomplete instructable, you can just hit "Save", then go back to it later. Better to do that then to get negative feedback that your instructable isn't finished. :)

[tvmaster]

thanks for that language thing comment :p
but i have published this instructable with reason because i have questions about it but there are parts that i alredey now for shure i nnow its incomplete but i can alredy help people with it and myself to if there were people that give me advice about things i dont understand ,
but if threre to much comments about its not complete (yet)
i wil set it oflline

ps: today i go to my uncle to order the parts :p

greetings

[thegeeke]

I understand. Good luck, but most of all, have fun! :)

[tvmaster]

thanks

[Bongmaster]

this seems a little incomplete to be published.

if its a question, then u should probably be asking on the forum