4K projector guide - your questions

Hi, I'm putting together the parts list for my specific version of this project and i'm wondering how to find the correct power socket for my laptop brick which has identification code: (LA130PM121). Any help or direction is greatly appreiciated thanks!

Bob Jenkins

Hi Matt, have you tried to use the projector in ambient light? What are the results? As one of the wishes from my client is to be able to use the projector in ambient light. Would you recommend I still use the same light source then? I am struggling a bit with making the right choice.

Lena

And Heeey what about watercooling PS5 in diyperk version <3

Angry bee

Hi Matt. this is Angrybee From pakistan.

Angry bee

I'm considering a terribly bright LED with much more lumen than the 100 watt model, but using water cooling? Has anyone attempted this?

Hi Matt. Can you add the english subtittle in your 4k projection video... i understand english very well...i can understand while reading. :)) i want to understand every important sentences... sorry for my bad english :))

hey matt firstly great work 3 questions 1. how good is the brightness? its enough or to dark? 2. its possible to use a Nubia Red Magic 5G display for have a 144hz beamer for gaming? or which gaming display is possible? 3. gives pre cuttet,right sized aluminium plates as set to buy??

DoomsGate Security

Do you have a wiring diagram for the projector setup?

Luv the content you put on YouTube matt

Ellis Garbutt

Mat who answers your IT questions as for some reason my subscription doesn't seem to go through when I updated it a couple of weeks ago and am still waiting for a reply

Hi Mat , can you please advise on the volt drop board with 1 fd cap for the android phone to replace the battery?

hi sir pleas would you explain how I can replace the power button of any laptop with a custom pc power button . I didn't find any explanation in the intent about that. thank you again

Hey, I've followed your instructions to the projector but when I install the LCD panel from the Sony Xperia no light is passing through. Could you give me any suggestions into how to solve this?

How do you adjust the projectors throw, other than moving the projector?

Excellent project! thanks for this! Can you please provide more details about gt2 timing belt pulley? how can I get the actual interior that screws on the rods? thanks

I dont have any questions, just want to say thank you for this and all you have done. It's always a blast to see truly resourceful and novel uses for old items being applied and creating genuinely interesting and useful items.

Mika! The Above Average Dog

Hi Matt! I have been planning to build something like this for a long time and thank you for making a detailed video. I'm planning everything because shipment takes forever from China and import taxes are more expensive than some parts in my country. Things I'd love to have covered in the guide: 1. Lenses I don't know much about the lenses and I still couldn't find one for my build. In my research I found out I'll need a lens with "Throw Ratio: 1.70 - 2.50, f/2.1 - f/2.5" features. Specially something like Barco Zoom EN41/EN61 lens. But since these are professional lenses and costs a lot, I couldn't find something similar. My throw distance is 5 meters and screen size will be 100". 2. Cooling of the LED and LCD. In my design, It's sucking air from front to the back with fans on the middle and back. Middle fans are for the LCD and back fans are for LED and other components: https://www.dropbox.com/s/j2wblhjtjo3yh6y/Screenshot%202020-06-28%2015.12.12.png?dl=0 I have couple questions: 1. I'm guessing you put LCD after both lenses because It's a touch screen. Can we put LCD on the middle of both lenses like in my design? Because if it's after the converging lens, after couple centimeters, light would miss the corners (it did not in your case). I'm wondering if my calculations are wrong. Checkout this image: https://www.dropbox.com/s/7b8gtv3gy2vez9q/Screenshot%202020-06-28%2014.54.40.png?dl=0 2. I'm planning to cover sides of the light (check first image) so I can use that space for components and make projector smaller (55cm in width right now), and light won't heat all components. What you think about this? Here is an example: https://youtu.be/CT9enQ4HIJ4?t=81 3. If we flip the LCD in both ways, will we still need a mirror since it'll be in the reversed direction? Example: https://www.dropbox.com/s/i3bg55msll07lye/Screenshot%202020-06-28%2015.02.10.png?dl=0 4. More specific question: I'll use a 2K 5.5" screen for my first build and I'll connect a Xbox One S. Since these displays are in portrait orientation, I don't know if they will display correctly. Did you tried a source like this before? Hope you can answer, sorry if I asked a lot of questions Thank you again :)

Umut G

Yes to echo the above I'd also like to know more about using a standalone (and high refresh rate) LCD screen with HDMI input. The phone route is really limiting..ie how would one connect a pc or console? Also if using a physically larger LCD panel how does this affect lens choice?

Alan Devine

Actually forgot this one but is there a difference between wide angle and large format camera lens? Can a wide angle be used instead if i cant find a large format?

Cool. I have a few questions. If we use an lcd with a control board instead of the phone do we still need to mimic the infinite battery? And can something like a raspberry pi be added instead for control if there’s no phone Internally. For the step adding the projector lens and mirror do they need to be in that specific order with the lens first or can the mirror reflect the image into the lens and have the lens on the front of the projector instead? Not a major build question. Just thought it’d be cool aesthetically if it was possible.

hey Matt! the projector is amazing...definitely a project i'd like to try. could you go into a little more detail about the focal length ranges and options for the various lenses please? maybe in the form of two examples to illustrate how a different lens impacts the build size, focal range and throw distance. on a side note i recently found out that CD/DVD disks are basically fresnel lenses with a shiny backing, so if you remove the foil you're left with a clear lens. or you can use them as a culminating reflector (i think). thought you might find that interesting :-)

Darius Zaerin