Building a TRUE 4k home cinema projector (it’s awesome)

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Despite being homemade, this DIY projector packs a punch! Also, the first 1000 people to use this link will get a 2 month free trial of Skillshare Premium Membership:

If you enjoy project build guides like this, please consider supporting my work on Patreon:

The PDF guide is now available over on the Patreon page:

Here are the main components required for this build:


Threaded rods:

LED (choose 5600k for pure white):

OR (cheaper, but larger diameter - choose 100w)


Power board:

Fresnel lenses:

LCD panel + control board:

4K LCD panel + control board:

Large format camera lenses:

How to make your own front-surface mirror:

Video on powering LEDs:

  • The written guide is now live for those interested! At the moment it's exclusively on Patreon for ease of hosting on my part:

    DIY PerksDIY Perks8 أشهر قبل

      Mateo J ButelerMateo J Buteler39 دقائق قبل
    • @Wade Eli awesome! Took about 10 minutes but it reallyworked!!

      Zechariah BenjaminZechariah Benjaminأيام قبل
    • i dont know if anyone gives a damn but yesterday I hacked my girl friends Instagram account using Instaportal. Just google for it if you wanna try it

      Wade EliWade Eliأيام قبل
    • Thanks so much for this project! Quick question - How much is the maximum distance from the wall that this Projevtor setup can output without noticeable reduction in projected video quality?

      Fraz AjmalFraz Ajmal6 أيام قبل
    • How much did you spend to do this?

      wayn rooneywayn rooney13 أيام قبل
  • Awesome!

    ahfpcaahfpca2 ساعات قبل
  • Wow

    jack frostjack frostأيام قبل
  • Great video! Thanks for making it. I’ve got a screen from an iPad mini 2 (200mm x 135mm, 2048x1536 resolution). Would that work for this project, or will it be too big?

    Drew BarthlowDrew Barthlowأيام قبل
  • I would love write subtitles for people who don't understand English, your projects are AWESOME. Greetings from Mexico.

    Luis MaresLuis Maresأيام قبل
  • What’s the final cost on this?

    Austin CapellAustin Capellأيام قبل
  • Any reason why you couldn't use a fresnel lens to focus the image on the screen instead of the circular lens? That said, really curious about the total cost of this, looks like it gets up there in price.

    Mike BMike Bأيام قبل
  • actually i thought a projector could use a lots of light.

    attah hamidattah hamidأيام قبل
  • There are lots of videos made on "DIY LED Video Wall" made using led strips but none of them are genuine,, could you "please" make a video on that.

    Yashwanth HYashwanth Hأيام قبل
  • Wow. Your le93ndary !

    le93ndary reviews2020le93ndary reviews20202 أيام قبل
  • imagine that mounted upside down. headings banging left and right.

    SeNniNSeNniN2 أيام قبل
  • speakers?

    xSpace AstronomyxSpace Astronomy2 أيام قبل
  • check out related tech content on my channel 💕 please do subscribe

    BeingmehullBeingmehull3 أيام قبل
  • THANK YOU !!

    XplorerXplorer3 أيام قبل
  • Great Job! Very Enjoyable content as a fan of a good projector!

    Jason YeomJason Yeom3 أيام قبل
  • Wait a minute, you never compared the home-made projector to off-the-shelf $2000 one. :/

    Naif JanNaif Jan4 أيام قبل
    • He did

      Ahmad ZakwanAhmad Zakwan3 أيام قبل
  • Very cool, even if I have no chance of finding the time & patience to replicate a project like this! I wonder if an RGB light source would improve the brightness & reduce LCD thermal issues, as it would focus all of the power on the wavelengths that will pass through the LCD rather than be absorbed by it? You might find a 200w RGB LED doesn't increase the LCD temperature as much as a 100w white LED, though of course you'd need to boost the cooling of the LED. On the LED cooling, generally heat pipes tend to work better with gravity assisting them and the thermal load being at the bottom, so moving to a water cooling system may give big improvements if that's an issue. Awesome work. Love your videos!

    David McNaughtDavid McNaught4 أيام قبل
  • 😎

    Ovrlrd UnknownOvrlrd Unknown4 أيام قبل
  • Maybe water cooling the screen by making the water pass between the screen and a 300W LED with a reflector would make it more silent and brighter..

    the_dudethe_dude4 أيام قبل
  • Can LCD screen work, if we remove back polorizer layer?

    Abdullah KhanAbdullah Khan4 أيام قبل
  • i would love to see the 500w LED in it ;)

    kacmogkacmog4 أيام قبل
  • perfect :D

    Levente DávidLevente Dávid5 أيام قبل
  • I bought an xperia xz for 99 € and put it in an F30 projector that I bought 1 year ago for 140 € the rendering is magnificent.

    BNXBNX5 أيام قبل
    • Are you serious? If so, I got the same things lying around - how did you do it?

      Incentive IncentivesIncentive Incentives2 أيام قبل
  • Cool video - however why build this ? Walmart 43 inch 4k TV $228.

    Brett RisenBrett Risen5 أيام قبل
  • Oh I’m so tempted . Used to build speakers and amps when I was a lad. Great lockdown project. Thanks.

    Ig LooIg Loo6 أيام قبل
  • Fake. You'd never be able to find the focal point using the Sun in England.

    Duncan TaylorDuncan Taylor6 أيام قبل
  • why you are not Elon Musk!?!?

    Gianluca MingottoGianluca Mingotto6 أيام قبل
  • Hey Matt! Can you make a DIY RGB keyboard? Would be very interested to see how you'd do that!

    Pim VisscherPim Visscher7 أيام قبل
    • I can't really think of any special way to do it tbh... there are switches that have an RGB LED integrated into them, and you can just plop them into a PCB that is compatible with them and call it a day Most keyboards use the clear/translucent housing switches with SMD LEDs on the boards (usually ws2812b or sk6812)

      RafeeRafee5 أيام قبل
  • Great video, you really answered all questions I had during the video, thank you so much.

    IC-FRIEZAIC-FRIEZA7 أيام قبل
  • Most ppl here say they dont have the materials or money, well if you manage your money well and find a job, invest a bit and of that return you buy whatever you want, you make life easier!... C'mon YOU ARE GROWN, DON'T LIVE AN BROKE ADULT LIFE!

    IC-FRIEZAIC-FRIEZA7 أيام قبل
  • As a cinema 4K projector owner I will just deal with my latency by crying quietly

    Deez NutsDeez Nuts7 أيام قبل
  • When he said 4k screens of this size are not at all common I was thinking of the sony And then he mentioned the sony I was like yeahh!!! XD

    The Muffinman 711The Muffinman 7118 أيام قبل
  • Going to have to build one an do some changes am thinking if springs between plates for leveling.

    alun robertsalun roberts8 أيام قبل
  • Hi.. Why do the front lens work from the side and not straight from the LCD screen? What's the difference if the LCD is straight in line with one line? Does it affect image quality?

    Wrh WrhWrh Wrh8 أيام قبل
  • Built them in the past. Cheaper to pay a few hundred bux nowadays and work to about 80inch in full light room. Just go for a cheaper multimedia projector, they work great aa a movie projector and more. Cheers

    KrashulkaKrashulka8 أيام قبل
  • I don't see the point of expending a lot of time and energy building an admittedly impressive, but very cumbersome and large overhead projector from scratch, when the same thing could be made much more easily, cheaply, possibly better, and certainly more convenient by being much smaller, all by simply modifying a cheap old overhead projector with an appropriate LED light source, something I'm currently doing and hoping to do a video on. If anyone can tell me that I've missed something and therefore gotten it all wrong then please do let me know, I'd rather be proven wrong than remain ignorant! :)

    MadScientist512MadScientist5128 أيام قبل
  • I've seen many DIY projector builds where the LCD is in between the two Fresnel lenses, so that the light rays go straight through the panel... This is the first time I've seen it done this way with the LCD after the to Fresnel lenses. Is there any benefit to either way? My thought was that with the LCD in between the Fresnel lenses, the light will pass through the polarizing layer "easier" making the image brighter? Any thoughts on this?

    Louie AtienzaLouie Atienza8 أيام قبل
  • the threading down those rods, over and over, no thanks

    LygerLyger9 أيام قبل
  • i calculated the cost and its around US $579.30 and im sure im missing some stuff like the laptop power supply, i'd be better off with a used 4k projector for a little over 600

    Wale AlizWale Aliz9 أيام قبل
  • I would like to have this projector.... Please give me

    Kevin Li Kit KwongKevin Li Kit Kwong9 أيام قبل
    • What do you mean.. Dont you know you Can just build it yourself?

      Flighty eyesFlighty eyes9 أيام قبل
  • What is that MUSIC? I know it from somewhere, like it's calling out from my deepest cgildhood memories!

    DoggeDogge10 أيام قبل
  • Matt ... you are awesome. Thank you for existing.

    ololh4xxololh4xx10 أيام قبل
  • I might have missed it, how much electricity does this use?

    Tristan RyanTristan Ryan10 أيام قبل
  • 3 minutes in.......I go buy a Sony 4k projector for under 200 bucks 🙄

    Richard KocksworthyRichard Kocksworthy10 أيام قبل
  • Higher wattage LED wouldn't that big of a deal. Either of custom water loop or an AIO water cooler running low RPM high static pressure fans. Might even be good for what you built here. Of course you now have to deal with a radiator at minimum, pump/res/rad at maximum. Crazy build, I LOVE it! I might actually build one of these....and I sent this vid to someone I know that wants a 4k projection SimPit for computer gaming. Not sure the details for translating to a computer output, but this person would be the one to bridge the gaps.

    MrAcuta73MrAcuta7310 أيام قبل
  • haha wonder how many spanners have destroyed phones trying to do this !

    yandyyayyandyyay10 أيام قبل
  • Very smart though :)

    Janos SzentpéteriJanos Szentpéteri11 أيام قبل
  • Nee poliya

    Harikrishnan SHarikrishnan S11 أيام قبل
  • Excellent video! Have you measured how many lumens it outputs?

    Bill QSBill QS11 أيام قبل
  • Ok. How about a sound bar build to go with? Is it possible to build a diy Dolby Atmos or something like that?

    Tony BaddeleyTony Baddeley12 أيام قبل
  • The light shone is hot, no? How does it affects the panel?

    Amier AsyrafAmier Asyraf12 أيام قبل
  • very nice.

    Kiran ChincheKiran Chinche12 أيام قبل
  • Interesting how many of you guys have this project done. Have you even started?)

    Cyrill 108Cyrill 10812 أيام قبل
  • Hello I'm mad

    grotticraftgrotticraft12 أيام قبل
  • Since you use a mirror I wonder is the image reversed or is left right etc.??

    tdrnkrtdrnkr12 أيام قبل
  • Wonder if this is possible using Apple iPhone hardware...

    LoreZyra . TVLoreZyra . TV12 أيام قبل
  • This is what Elon Musk would be doing if he never created PayPal.

    Chad JohnsonChad Johnson13 أيام قبل
    • lol

      Samson KinyanjuiSamson Kinyanjui11 أيام قبل
  • The cost of the whole thing?

    PrezlamenPrezlamen13 أيام قبل

    lissette veleclissette velec13 أيام قبل
  • What a phenomenal super human. I enjoyed every video I've watched him produced.

    Anthony BalogunAnthony Balogun13 أيام قبل
  • what star ! thank you

    alex crisanalex crisan13 أيام قبل
  • Absolutely fun and i learned alot today, thanks man.

    Vaany RamanVaany Raman13 أيام قبل
  • I love your ideas.

    Ryan singhRyan singh14 أيام قبل
  • for a brighter LED why not add two more low noise fans at the lens section that blow towards the outside? Also, airflow is much more restricted when covered like that as opposed to a conventional fan grill

    Harold KhanHarold Khan14 أيام قبل
  • This is incredibly cool! Might be worth trying to replicate if it's as low cost as you suggested. I wonder, though, what is the maximum distance you can be from the screen and still have enough brightness and sharpness to call it 4K?

    Kevin KonowalecKevin Konowalec15 أيام قبل
  • Yo, besides, I think you can grow hair then be a Curt Cobain twin;)

    Andre NikAndre Nik15 أيام قبل
  • Next part: Bellows cooled projector

    tutacattutacat15 أيام قبل
  • Figuring out if the phone is lcd or oled isn’t a problem, but how would one deduce whether the screen can be controlled remotely? I’ve got an old iPhone 6s that Id like to use for this project. I believe it does have an LCD screen.

    David ShawDavid Shaw15 أيام قبل
  • Curious how you would make the projection angle adjustable. Or at least calculate the angle. I'm assuming it depends on the lens you use.

    Why Name?Why Name?15 أيام قبل
  • Start simple but it became for expert only!

    jean-philippe tremblayjean-philippe tremblay15 أيام قبل
  • I'm just rewatching to remind myself ill probably never build this , but its an awesome project

    Draw4yourlife3Draw4yourlife315 أيام قبل
  • Amazing stuff! Would really like a 720 smallish projector maybe a raspberry pi for the underlaying computer stuff. Maybe have it driving a stepper motor for focus also.

    Alexander WingeskogAlexander Wingeskog15 أيام قبل
  • How much is the cost for the whole project

    yasmin's worldyasmin's world15 أيام قبل
  • Love it! I'm feeling a bit mindblown lol

    Daryoush NekooiDaryoush Nekooi15 أيام قبل
  • Amazing and crazy...

    KSTV Kajian Semarang TVKSTV Kajian Semarang TV15 أيام قبل
  • i think u can try cars led projector headlamp, it give more bright..

    Adarsh RaveendranAdarsh Raveendran15 أيام قبل
  • Remember back in the 90's when Anthea Turner made Tracy Island out of cardboard on Blue Peter and you sent off for a "Fact Sheet"?...... Well this is the 21st century "God Tier" equivalent! 👍😎

    CamENGCamENG16 أيام قبل
  • a miniaturised 3d print solution would make this easy for anyone to make

    Aakash JanaAakash Jana16 أيام قبل
  • its sad that there is a piece of hair in the image

    Samuel D'souzaSamuel D'souza16 أيام قبل
  • Can it be done using amoled screen

    Harun BaklanHarun Baklan16 أيام قبل
  • Let me have yours mate. Brilliant video!

    Cotten HelmsworthCotten Helmsworth16 أيام قبل
  • It’s 4

    cory ingliscory inglis17 أيام قبل
  • I am absolutely impressed the only thing I would add would be rubber grommets where the wires passed through the aluminum to avoid chafing

    postersm 71postersm 7117 أيام قبل
  • What should be the distance between light source and lens if I use multiple leds

  • Очень интересно, но не очень понятно, что говорит

    Polzovatelgogolya AaPolzovatelgogolya Aa17 أيام قبل
  • Now instead of a phone hook it up to a Raspberry Pi 4, install Android TV on it and route an ethernet plug to the bottom of it.

    neoneyneoney18 أيام قبل
  • Hi Matt, really amazing project!! Can it be used as a pc screen? And to take it a step further, is it possible to use it for photo editing?

    Mae SmetsMae Smets18 أيام قبل
  • Too complicated for me to get

  • Великолепный дизайн! Спасибо за отличное видео и вдохновение. Подписываюсь!

    Сергей ДонсковСергей Донсков18 أيام قبل
  • Great

    Unknown NUnknown N18 أيام قبل
  • Another excelent video from DIY Perks. I really enjoyed it !

    gambarimas87gambarimas8719 أيام قبل
  • I mean, I absolutely love having this DIY and all... but the parts cost is higher than retail 4k models, which are also more compact.

    Micah R. MaloneyMicah R. Maloney19 أيام قبل
  • Very nice! Impressive and the best as always. Shame there no CSI or other modern universal adapters on the market yet, to utilize the high quality 4K cell phone video cameras. Thanks for sharing!

    jafinch78jafinch7819 أيام قبل
  • so here is a proposal. in order to reduce the heat, could you use a flat infrared filter?

    Electronik-FArtsElectronik-FArts19 أيام قبل
  • Hey matt, could you do a follow-up on how one could connect this to a pc for gaming? because that would be really epic.

    dun candun can20 أيام قبل
    • Maybe you can use remote control of your gaming pc through the android inside projector?

      Peter iPeter i18 أيام قبل
  • this with a built in HTPC would be dope... think i may set about doing that

    Austin RossAustin Ross21 أيام قبل
  • Who wants to make me one?

    madelynexmadelynex21 أيام قبل
  • You are a genius, your projector is a masterpiece, congratulations

    obed yeshuaobed yeshua22 أيام قبل
  • How tf did he pronounce aluminum?

    Jbaby425Jbaby42523 أيام قبل
  • What if you cooled the lens with a blower, sound deaden the inside to reduce fan noise

    Matt SantanaMatt Santana23 أيام قبل