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Пікірлер: 185
@carnifexx4 жыл бұрын
Just for late / future viewers, most overhead projectors have the same size, a 13" laptop screen panel is too large, so pixel on the side will go missing, the best fit seem to be 12.5" laptop panels, they fit perfect and they come in full HD resolution, you can drive them with a cheap FHD HDMI LCD controller, so you can hook up your PC, laptop, media devices, consoles. Also change the light source to a 100 or 150 watts cold white LED with a large CPU cooler, use a 24V Power supply and a voltage controller to drive it to the correct LED voltage and may be to dimm it if its too bright (like a DP50V5A). You can use cheap 140mm 2 pin PC fans and a cheap 4x PC Fan controller hooked up to a 12V power supply to cool everything relatively silent. Other modifications can be a large F500mm lens and a "rectangle 16:9 condenser projector lens" for the LED. If possible, get rid of the mirror, put it on a shelf or mount and project directly to the wall.
@PracticalEngineeringChannel8 жыл бұрын
Glad to see some civil engineering on your channel! Awesome video as always.
@ThePostApocalypticInventor8 жыл бұрын
+Practical Engineering "One of America's seven modern civil engineering wonders" :D. You have to love the pathos and parlance of these old documentaries. Civil engineering is absolutely fascinating, but at the moment I'm confined to the smaller things that I can actually involve myself in :D. BTW: Great to see you here in the comments and to know that you liked the video!
@brianboni48768 жыл бұрын
Love it! I'm going to try this. When that lamp expires you should try a new high wattage LED. Should cut down on the heat and reduce the fans.
@ThePostApocalypticInventor8 жыл бұрын
Here is a follow up-video for this project, showing some upgrades: kzfaq.info/get/bejne/priEmpSgvq6ckok.html
@kbhasi8 жыл бұрын
this is the nicest looking implementation of this idea I've seen thus far...
@awldune8 жыл бұрын
That geared focus mechanism is wonderful :)
@l3p38 жыл бұрын
No! Do not toss away the backlight panel! By itself, it could be used for various things like decoration. You can paint on transparent foil and hang it on the wall, as an example. Or you could salvage the pipes in it for decoration, too. Put over each other, with a parabol reflector, you can get a pretty energy efficient light, maybe for your workbench (assuming you have no LED lights there) or against burglars outside!
@l3p38 жыл бұрын
An very interesting type of decoration can be achieved by using multiple layers with some of them moving/spinning...
@ThePostApocalypticInventor8 жыл бұрын
I didn't think that people would take me literally when I said, that you can toss the other stuff away. I didn't mean that the other parts are totally useless. I meant that you don't need them for the projector.
@l3p38 жыл бұрын
My hearth just started pumping again.
@h3Xh3Xh3X8 жыл бұрын
+Len P What does your hearth pump, oil?
@l3p38 жыл бұрын
Lennart Nilsen, blood, maybe.
@38911bytefree8 жыл бұрын
Kodak has a product LONG ago that was like a retrofitting for those projectors. It was an LCD Screen without any back pieces, just the glass (and polarizing filters I believe) I think it was TN type, not a TFT type. The product was called Kodak "Proxima". I saw it in action once and being a late 90s product it worked very nice. But yours works stunning.
@lelandclayton54628 жыл бұрын
I built one of these back in the day and have dismantled quite a few LCDs as well since the search for the correct LCD felt like a pipe dream but Craigs list and ebay had "broken" LCDs for peanuts if not free. The LCD panel itself can be power with 3.3v and 5v. Sometimes 12volts. On my final build I used a 12volt wall wart with a LM7805 and LM7803 regulators. For cooling the LCD panel I used some AC powered fans that were pretty quite and tied into the main power line to the projector. This way I didn't have the high voltage inverter board in the circuit let alone I was using a LCD that had a bad PSU.
@cdoublejj8 жыл бұрын
this has a prog over store bought projectors aside form being to get most of the materials super cheap or free one could modify the projector to house not only contain all the components but, also install a Bluetooth sound system too. heck you could even build in battery bank to charge stuff while you watch movies, specially if you use it out side or something.
@themaconeau8 жыл бұрын
I've seen commercial versions of this from Kodak and 3M back in the 90's. Was nothing compared to what can be done these days. Love it ;)
@QtmMtrlzr8 жыл бұрын
Haha, I think they show that same exact Hoover dam video when you visit the dam and do the tour. I live here in Las Vegas and have visited several times, it's a pretty cool sight to see if you're ever in the area.
@TRUMPLocalWallBuildersUnion8 жыл бұрын
it serves dual purposes. .. generate electricity. .. and its also a temple dedicated to alcyone .
@JaapioNL8 жыл бұрын
Nice, I built one using an old overhead projector, a cheap laptop and did an led mod on the projector because the old lamp got too hot.
@italotorres36535 ай бұрын
Any tips for this mod?
@vthrash78328 жыл бұрын
man you blew my mind. I've seen diy projectors in the past, using small LCD and LEDs, but It never came to my mind that I can use a retro projector like that. I'm thinking that with a lot of time toy could build a nice projector using the lens and fresnel of the retro projector, but putting it together in a linear arrange. this could improve the width of the projector a little bit. also you could adjust the projecting plane to move the projector out of the way. Now I want to give a try. thanks man! you're awesome.
@russellbailey82508 жыл бұрын
Very nice implementation. Also just to add about the dangers of mains connected power (especially at 240 volts like here in Australia) the large capacitors can continue to store lethal DC mains level voltage (or higher) for some time, so ensure that they are 'safely' discharged after unplugging the mains power before you consider handling the power supply board!
@freesaxon68358 жыл бұрын
A bright led cluster type bulb replacement would improve things, nice build though ! It brings the spirit of 16mm projectors back, without the ripping of the film that often happened :-) Like the music near the start.
@skycarl8 жыл бұрын
Plug my water and call me dam Hoover. That came out really nice. Well done on this. Great find on the projector as well. Carl
@nferraro2228 жыл бұрын
I vaguely recall that commercial LCD/overhead projector adapter units didn't have cooling, either. The housings were thin enough to drop into a briefcase. I was surprised, because, as anyone knows who got stuck sitting behind one in high school, they get hot as hell.
@cyrustakem79938 жыл бұрын
You can salvage small screens from old laptops, that you can buy cheap, then you would need an LVDS driver that costs around 6~7€ on ebay.
@Joekutz8 жыл бұрын
I remember planning to build one of these some years back - what held me back is the fact that the TFT-LCD will age very quickly (please tell me when I am wrong) even when it doesn't get too hot, because of the strong IR radiation from the old-fashioned lightbulb. Using a stong-ass LED (150W) might actually work well, but I did not see a project like that yet.
@StevenWebb18 жыл бұрын
Nice build. Looks really polished. I like you kept the projector complete.
@ThePieterbas7 жыл бұрын
years ago i build my own 1080p lcd projectors. Its not easy but you need, cold mirror as a reflector for a 400 watt hqilamp ( now days maybe led ) You need ir/ uv filter glas, condensor lens, 2 fresnel lenses of high qualtity, and a good varyfocal projection lens. With those parts and some knowledge it will be a great picture.
@ThePieterbas7 жыл бұрын
i can provide you with pictrues of my builds ( over 25 builds )
@GermanToolReviews8 жыл бұрын
Awesome. I also have an overhead projector in my closet that I got from a dumpster dive.
@44Kilovolt8 жыл бұрын
Ah those old projectors aka "Meotars"...altrought theyre old, some are still in use in schools. But your idea to turn it into an lcd projetor is brilliant!
@1013redoak5 жыл бұрын
You're so smart, I wish I knew you! I can't even hook-up my Home Video/TV system!
@Friendroid8 жыл бұрын
The shot at 2:25 looks like a Kubrick movie set
@Seegalgalguntijak8 жыл бұрын
Haha, that last example video fit the age of the projector perfectly! ;-)
@q12x2 жыл бұрын
Very cool project ! The next version is to make a 16:9 wide screen projector compared to this 4:3 one. I know, I know, everything fitted this way, but Im telling you as a challenge. For the future.
@Farm_fab Жыл бұрын
Gerolf, this would be fascinating if you could use an LED light source today.
@RinoaL8 жыл бұрын
this is one of those things that i wish i had thought of, its really straight forward and really cool!
@ryanb19385 жыл бұрын
I have a been wanting to buy a new computer projector But they are so expensive. I have a couple of old overhead projectors and this is an amazing invention. I'm gonna try and get some help to see if I can make something like this as well. Brilliant idea
@TheMetalButcher8 жыл бұрын
I might just make this. But with a much brighter LED of course.
@DanielMcGregor8 жыл бұрын
Reminds me of the Projector I made when I was still a member of Hackerspace Bielefeld. It should still be there. 👍I should go around and say hi.
@contentedbuddha8 жыл бұрын
Imposter! Everybody knows that Bielefeld doesn't exist
@jakewilkes76108 жыл бұрын
You could always buy a dead laptop from eBay for next to nothing and then buy a driver board for the LCD from eBay for about 20 USD, these drivers usually have vga dvi and hdmi on them.
@blackcountryme6 жыл бұрын
I did this years ago, I put a fan to the side of the LCD (which I stood on wood blocks) to blow air between the LCD and the main projector base. I played killing floor the UT 2004 mod.(with motion sickness) 8 foot high zombies projected onto a wall. Fun times..
@talaminia8 жыл бұрын
this is really cool, but your next project should be converting that bulb to a white LED without modifying the projector. I am sure you can come up with something. ;)
@DissertatingMedieval4 жыл бұрын
I'm sure it's long gone, but next time you do this keep the diffusers, light tubes, and fresnel lens from the display. You can use 5050 RGBWW LED's with them for DIY light panels.
@Friendroid8 жыл бұрын
I could watch your videos for hours. Which I do!
@zx8401ztv8 жыл бұрын
What a smashing result :-D, and the colour and contrast look really good. Your too clever :-)
@ETericET7 жыл бұрын
First video I have watched ... Subscribing now. This channel looks exactly what I have been searching for.
@DanWilliamson_profile8 жыл бұрын
This is stunning! Very nicely made!
@MyShopNotes8 жыл бұрын
cool use of old tech.
@flori83208 жыл бұрын
First of all, my thoughts go to everyone touched by these horrible events in Germany. Apart from that, in order to avoid being disturbed by the light from the projector you can also do like in the theater and place the projector behind and higher than the audience.
@ThePostApocalypticInventor8 жыл бұрын
I just ordered a very powerful LED-module and I will try to use that for a future mod. But it was a very spontaneous decision and I didn't have the time for a lot of research on that yet. Any suggestions for particular LEDs that would be well suited? Links?
@Seegalgalguntijak8 жыл бұрын
It all depends on the beam characteristics (both of the light source and the projector). As you know, LEDs are much more directional than any of the old style incandescent or halogen bulbs. If the projector is set up internally to harvest as much light from that omnidirectional light source and spread it evenly over the whole projection surface, it may be hard to compensate for the LED that beams its light only in one direction. Other than that, just take care that it's bright enough (cooling will also become an issue), I'd try it with something around the 50 Watt range, but that might actually be too bright already. And of course there's the light color, which will give you just a "whiter" white when you use LEDs in the 5000-6000 Kelvin range, instead of those in the 3500-4000 Kelvin range that resemble the old style bulbs a bit more (they're sold as "warm white"). If you really want to save on energy as well, build a proper "joule thief" circuit for it (with an adjustable potentiometer) and you'll make it much more efficient. For that, having a LED that's a bit too bright is actually good because then you don't need to run it at 100% brightness, but go down to 95% and be even more efficient with a Joule Thief.
@AwakenedAnhedonic8 жыл бұрын
I was thinking about this while watching. You'll want LED's that render color well. This store has many options for LED's with up to 98 CRI. Check out some of the youtube reviews for them. store.yujiintl.com/ This is a fun project to watch.
@AwakenedAnhedonic8 жыл бұрын
Well, actually LCD panel LED's don't use high CRI LED's. Some use RGB LED's for high gamut, but you'd still have an edge with color.
@Seegalgalguntijak8 жыл бұрын
Awakened Anhedonic Isn't the color calibration of LCD panels usually done through the panel itself, so it can be independet from the LEDs?
@AwakenedAnhedonic8 жыл бұрын
Yes, it'd look fine without the perfect light source. There's a lot of people who say plasma screens with fluorescent backlighting had better color. Today screens use cheap LED's. High gamut screens that cover the Adobe RGB color space use RGB LED's which have sharp intense peeks in each primary color. The spectral characteristics of the light source is still relevant, even though LCD filtering compensates.
@trdavis558 жыл бұрын
that is a truly awesome DIY project. I'll add that to my bucket list of projects. !! :-)
@stevelavalette68988 жыл бұрын
I grew up with those things in school !
@andrewavery767 жыл бұрын
i built one of theses with my son about 10 years ago when projectors were very expensive to buy ..we used it for years and my son took it with him too uni when he rented a house .. cooling was the biggest problem along with noise ...now i have a 2nd hand lcd projector cost me £29 ..much smaller lighter but not much quieter to b honest ..
@BigDaddyBulldozer8 жыл бұрын
That's a Cool Project, Thank You for Sharing !
@enri_19868 жыл бұрын
First Like on this video, the projector is a piece of history like new, (MADE IN GERMANY). Good to know PAI that it was not dismantled.
@enri_19868 жыл бұрын
Good to know you care about AMERICA!.
@bborkzilla8 жыл бұрын
It's historical - made in West Germany!
@enri_19868 жыл бұрын
Yeah but still Germany.
@CSSIandAssociate8 жыл бұрын
I think I would just use a modern projector. I had one. Let me son hook up the Xbox to it. He and his friends loved it. Took up a whole wall. I think you are the only one that will do this. Good story but not very practical. With that said. I do enjoy your vids.
@jerkovicbrate8 жыл бұрын
I build this kind of projector maybe 10-12 years ago.Has 120" display, but for good quality picture I used 400W MH lamp. My sugestion is dont go with LED.
@joegile8 жыл бұрын
Dude, I so wanna be your friend!!! Excellent Dude!!!
@kieferonline8 жыл бұрын
Very nice result. I don't think the perpendicular orientation was awkward at all. It appears to make sense due to the way you installed the buttons. Well done! I'd be proud of this setup.
@spencerboaz23858 жыл бұрын
Never thought of that , pretty cool .
@TVperson14 жыл бұрын
That's amazing dude, great work 👍👍👍 !!
@MegaApenstaartje8 жыл бұрын
Nicely done. thanks for the video
@theoblackadder81988 жыл бұрын
Excellent video! First class 👍🏼
@Quisl8 жыл бұрын
Awesome idea, although it seems a little blurry on the big screen.
@dozerjohn8 жыл бұрын
I still want that synth tune man...
@rastlach7 жыл бұрын
Can you put a LED light rather than the one you have there and put a heat sink to the outside of the unit?
@Fragg13Rox8 жыл бұрын
I'm curious, why not elevate the frame holding the panel, and build it so the fans are channeled under the panel to cool it? Could theoretically do that AND have a fan on top of the panel, shouldn't take much space and it would keep the panel considerably cooler. Very cool idea sir, I can't wait to give it a try myself. :)
@warddman8 жыл бұрын
very cool project
@ndog378 жыл бұрын
Your creativity never ceases to amaze me. Did you major in mechatronic or electrical engineering?
@gizmothewytchdoktor10498 жыл бұрын
this was a great idea and execution. thanks!
@TheKrogon8 жыл бұрын
Awesome project, as always !
@GriffinCorreia7 жыл бұрын
Interesting how I used the exact same LCD panel as you did
@maletil8 жыл бұрын
I really like this
@markhodgson23484 жыл бұрын
And this is why Britain and Germany should unite and create the new world
@der0keks8 жыл бұрын
TPAI, you were quick to respond (this video) to the news that VCR production has ceased!
@TheKrololo8 жыл бұрын
Looks neat
@powerzx7 жыл бұрын
Very good project. I have a question, you said that black box would make a better image, but what do you think about using mirrors inside the box? Would not it give a brighter image or help to have the same effect with darker LED?
@kraftybeard42728 жыл бұрын
Could you use the backlight from the monitor to make a lightbox maybe?
@NikiDaDude8 жыл бұрын
Very nice. Looks purposefully made for these old 4:3 documentaries. Have you considered gutting a used 10" tablet and using the LCD from it, some of those are full HD, and I've seen 2048x1536 ones if you want to keep the 4:3 ratio.
@superdau8 жыл бұрын
Displays in tablets (and phones) are almost always glued/laminated together. No chance getting light through them from the back.
@zsombor_993 жыл бұрын
How you managed to fool the monitor's electronics to be working without its backlight??
@AleksandarDimovskiVeles8 жыл бұрын
It's awesome, big Bravo!
@kokodin58958 жыл бұрын
my projector was made a little bit different 1 i used 13 inch laptop gloss screen, because the size is better unless you have very big projector 2 i did not use oryginal power syply, becuuse you simply need single 3,3 or 5v power suply to power the screen and digital board. 3 use metal halide light source 150 -250w r7s work great even in dayight and do not overheat the screen. (lcd is about45 *C after few hours of use without any fan, and that is in the middle) sorry for the mess kokodinlaboratory.files.wordpress.com/2016/06/100d1082.jpg kokodinlaboratory.files.wordpress.com/2016/06/100d1089.jpg
@gesamtszenario8 жыл бұрын
That's awesome.
@DDJThomas018 жыл бұрын
i was thinking about converting mine to LED as it sucks a huge 1900w when running, guess ill wait for the video and learn from that
@williwonti8 жыл бұрын
I don't see why some of the newer white COB LEDs couldn't be used.
@DDJThomas018 жыл бұрын
+williwonti good idea, I have about 10 laying around so won't cost me anything to try!
@brucewayne-px4lv8 жыл бұрын
Cool Build. How does it do with widescreen videos?
@CoolKoon7 жыл бұрын
As for the cheap LCD ($90 for a 10" LCD?! That's a LOT!) you might want to check for spare LCD parts for small notebooks (like Asus eeePC and similar models). I've seen some for like $28. Of course their resolution is nothing spectacular....
@nekomasteryoutube32327 жыл бұрын
I dunno how buddy found a 5 euro 15 inch LCD, searching up the LG Flatron 15inch on ebay for me shows a bunch of LCDs ranging from 40-80 dollars or more. Seriously I could buy a used 17-19 inch LCD monitor locally or at a thrift store for less then 20 bucks.
@daniellukonis8 жыл бұрын
I've been to the Hoover dam.
@accidentalengineering8 жыл бұрын
What's the song at 1:40? Fits perfectly to this video.
@Hoetobeajew8 жыл бұрын
darude sandstorm
@kHolm8 жыл бұрын
Very nice
@aserta8 жыл бұрын
I have in my cellar a Beseler AP 5-1 1000w projector, question is if i'll melt the screen from it :))
@Soeren_Hetzer8 жыл бұрын
I love youre Videos!
@haydenlost35638 жыл бұрын
i have question so thank s if answer me . the quality of siemens is better or bosch in home appliance such as dishwasher or washing machine sorry for my poor english
@GizmoTheGreen8 жыл бұрын
wow, I wanna try playing fallout 4 on that haha
@chemukef65128 жыл бұрын
do you know that you have no the need to dismount everything of your 5euros screen, you just need to add a colour filter on it, resolution will be the same. i'm just curious of what the purpose of this simple application because you can find video projector with extra lubs for a cheap price and perfect video resolution.
@shanethereefer94288 жыл бұрын
Very inspiring.. Viva the apocalypse!!!
@yoruhana1905 жыл бұрын
Destroyed 5 screens with this methode it was fun but useles got an awsome old projector from scrapyard much cheaper and easy to use.
@nenesbeauty4518 Жыл бұрын
Damn thought I was Jr high again
@Seegalgalguntijak8 жыл бұрын
Was meinst Du mit einer hohen Auflösung für kleinere Panels? Soweit ich weiß, werden Laptop-LCDs auch irgendwie standardisiert angesteuert, aber ich weiß nicht, was für Elektronik man dafür braucht. Da dürfte es aber 12 Zoll Panels schon für um die 50€ geben, die haben dann zumindest 1366x768, was zwar nur 720p hd-ready ist, aber besser als die 800x480 oder so, was es so bei 10-Zöllern leider viel zu oft als alte Restbestände von Netbooks gibt.
@Morkvonork8 жыл бұрын
Do you think you can use UV-Led's as backlight and build somewhat like a uv resin sla printer without a digital light projector (the part that makes them expensive)?
@MattTester8 жыл бұрын
I suspect it's technically possible but with an overhead projector you would need powerful lighting, I doubt LEDs would work but you could use a traditional UV lamp that would be compatible with the OHP (this would probably make it cheaper too). You would really need to make sure no light is spilt out for it to work properly and for safety. I don't know if OHPs have UV filters on the glass, I know a digital projector I took apart did (I used a small UV LED keyring to test the elements).
@jusb10668 жыл бұрын
What size TV screen is that approximate to?
@ManosHalikis8 жыл бұрын
+1 like for the film in the video!:)
@PatrykDarasz8 жыл бұрын
One year and still no welders. I give up.
@andychav5553 жыл бұрын
How's the performance in daylight
@franksalazar45768 жыл бұрын
awesome vid
@jerry13788 жыл бұрын
sometimes some videos load very slow and unfortunately this is one of them i have no idea why
@energylab2278 жыл бұрын
That happens with me too. Happens more when I use my iPad.