DOOM on a 3D-printed mechanical TV

[@DavidMulligan]

The childlike joy you expressed when you got to 20 fps is infectious! I always look forward to your videos.

[@skybirdprojects5489]

Replace the stepper motor with a DC motor for higher FPS. Use the optical interrupt as a speed sensor and interrupt driver to sync the LED and rotating screen.

[@johannlicher8420]

I think in this case you could even use the h-bridge already used for the LED to control both the LED and the DC motor.👍

[@nor24o2010]

@@johannlicher8420 Better would be a BLDC motor with FOC .

[@SidneyCritic]

If it goes too fast he'll have to put the disk in a vacuum - lol -.

[@grindfi]

Or how about a hard drive motor?

[@rdyer8764]

One of the mottoes we had when I was working with a very creative group of engineers was that you aren't pushing the limits of your circuits until you liberate the smoke from your chips. Glad to see you upholding that tradition! There are a handful of innovative YT content creators whom I follow. You've always been among them with your imaginative projects. Thanks for all you create. :))

[@DouglasFish]

using printed plastic as a screen is a fun concept, what a cool video

[@mumblety]

This is an awesome project! Glad you didn't forget Bad Apple and Doom.

[@Alleroc]

Now we need a 15" version of this.

[@mfbfreak]

With the disk, you end up at a very high rim speed, and a huge disk. However, you can probably print a mirror screw (a different kind of mechanical television that is otherwise fully compatible with the nipkow disk system) very well and stick either thin mirrors to it, or make your own by coating glass microscope slides with gallium.

[@MadScientist267]

​​​​@@mfbfreakI'm still not sure 15" is a good idea for that... the original spinning mirror attempts still only had spans of a few-several inches. That's a lot of not just mass but fragile mass, spinning rather fast, that also needs to be in near perfect balance because of these two ideas. That said I think the spinning mirror is superior in many ways to the disk (which still is far inferior even to earliest CRT), but would be equally more difficult to construct. I've actually attempted neither to date, however the mirrors would still be my go to for the first run at it. Clarity and size being at the forefront. Of course this means a photodiode camera also needs to be made... I'm all for working around that with a computer until the display is worked out, but to be authentic and take the experience all the way... 🤣

[@jparky1972]

Awesome! I never knew how the mechanical screen worked. Now I do!

[@BlondieHappyGuy]

You should see how the mechanical color tvs worked. Basically, a spinning disk as well, in front of a black and white CRT TV and the disk has red, green, blue filters (cellophane). There another disk in front of the connected black and white TV camera and the 2 disks are synced together. The color was actually not too bad. But obviously, it never made it big because being mechanical, there were a lot of issues.

[@MadScientist267]

​​​@@BlondieHappyGuyLOL Color is an adventure all in itself. Biggest thing is there were so many ideas that it was hard to call the best one early... Toss in the reliability of mechanical and a standard was difficult to implement. What's amusing to me is that the color CRT (particularly some of the last to be made) were capable of *way* more resolution than the SD TV signals feeding them (computer monitors demonstrated this clearly)... an amazing feat in itself considering how much has to line up just so to make a faithful picture from the signal. The mechanical versions almost seem simple in some ways in comparison. Stray magnetic fields weren't a color tube's friend... we live on a giant magnet. Of course the solution for that was rather elegant in itself in the end all the same. It's amazing to see how it all progressed over time.

[@apruszko]

Great!!! I read about Nipow TV about 40 years ago as young boy, and I have dream from this day about how to make te same system! You made thing of my dreams! Great, ... 😊

[@peter.stimpel]

Nice one. Now just add the 3 different colors, and reinvent color tv :)

[@VladoT]

I think that Baird had demonstrated color mechanical TV in 1928.

[@Poult100]

Not too difficult with a tr-coulour LED. 👍

[@jackcrawford304]

I wish I kept it together, but around a year ago I built a working camera and televisor in 1 unit with children’s snap circuits. I have the video on my channel, but it was a very small screen and it had 4-6 layers of snap circuits. It looked like a CPU die up close 😂 there were so many connections.

[@t7732155980]

Very intersting video, Thanks. Choosing a step motor is the quick way to solve the problem, but I would go with thress phase BLDC. The phosphor screen you used is slow, so you lost what you wanted to gain when decided to use UV led. Thanks again for very interesting Video

[@diyhard666]

Now use the blanking intervals to transport copyright informations or teletext 😂

[@bensmith3304]

I work with applications where LEDs need to be switched in under 1 µs, and the white phosphor LEDs can easily do this, it is really impressive. The lime and red phosphors, though, are pretty slow.

[@TaniaKisha]

You could try to simulate a scanline with a tape instead of a disc. a longer track is also given for greater details. :)

[@MadScientist267]

Ooof.. same issue as the disk. The "tape" in whatever form it takes will need to be frame width x line count long. Doing rough math, a 12" wide frame with 100 lines, would need to be 100 feet long in a loop, which does a complete pass for a single frame. For even 15 frames per second, you'd need to move the tape at 1500 feet per second. That's um... damn quick.

[@lithostheory]

Please upload a full version of bad apple with this unique setup!

[@Debrugger]

Awesome, there's some things that just seem inaccessible to make yourself like display panels and you kinda sorta made a working one!

[@DasIllu]

There is glow in the dark glue and paint. Maybe improvise a spin coater and coat some acrylic glass. It might allow you to fine tune the glow duration and maybe mix in some fluorescent dye to counter the green tint.

[@jckf]

Haha I recognized Bad Apple from the thumbnail

[@sebastiankusyk7764]

I also started building a Nipkov display, but instead of one LED it will have a whole matrix of them. Maybe even with the possibility to choose any combination which of them will light at the same time. So for each position of a hole there could be rays emitted from it at different angles (there will be no diffusing screen) and one may see different pictures depending on the viewing angle, or even holograms.

[@AndyCallaway]

Great project. All you need now is a matching camera. 👍

[@PrinceOfAstoria]

This project is BEAUTIFUL! You basically made a mostly Steampunk TV! Since you are using LED as light source, I wonder if by using polarizing filters you can make a RGB color tv.

[@michaelmayer775]

it should be possible to make multiple leds and screens around the disk for a multi monitor setup. Maybe a funky clock.🙂

[@roboman2444]

Would be kinda neat to use a cam or crank mechanism to aim the LED at the exact scan line the disk was currently showing. Much tighter beam and more efficient.

[@MrHack4never]

If you're using the right type of UV, you should be able to use normal printing paper as a screen, but then you should probably project on the same side as you view it on

[@yakacm]

The results produced by Logie Baird's TV may have looked really bad, but it always blows me away that he could do it at all 100 years ago. The fact that his TV was made with stuff you could buy from the local 1920's hardware store is just insane.

[@FrankGraffagnino]

i don't know why this makes me so happy... very cool... could we change this into a clock?

[@hollensted]

Absolutely love it! Anything with CRT or VFD is a fetish for me.

[@Poult100]

Wonderful! I love modern retro engineering ♥️

[@BRUXXUS]

This is such a cool project! Unlike anything I've seen made on KZbin before. :)

[@drfrancintosh]

Really Awesome! I love me some retro computing. But this is in a class all its own. Continued Success!

[@drstefankrank]

You can try to narrow the dots over the length and put 4 times as many on one wheel. Means that you can have 4 full images per rotation.

[@Yenrabbit]

Your videos are always such a treat! Thank you for sharing 😊

[@Naedlus]

Only two minutes in, and my first thoughts are "The DLP projector I am using to watch this is damn near the exact opposite of what you are making. It's amazing how things rhyme as they are iterated."

[@twin1q]

Very cool project. I would still like to see the CRT project working.

[@StormBurnX]

I've had an A1 Mini in my cart ever since I found out they were doing the black friday deal, so I got really excited to hear they were sponsoring you, thinking maybe there would be a code or something I could use to get the same discount but help your channel out as well! Here's to hoping the affiliate links work

[@Droid_Does_not_compute]

We eating good with these projects

[@verebellus]

at first I thought you called your viewers sheep, but deshipu was a user that recommended something lol

[@MegaSuperJaBaTo]

"Eleven" 😂 ... some kind regards from The Spinal Tab 😉

[@Galova]

Many people heard of mechanical tv, but there's nothing said about CAMERA to capture image to use with it. TV is not just a device to show a motion picture but also a device to capture motion picture plus device to encode and transmit it as signal and a device to receive it to display. And 100 years ago there was no darn arduino kits and programming.

[@dav1dbone]

I believe there are archived vinyl recordings by John Logie Baird, there was a news story a few years ago, reaching out for anyone interested to display their content, obviously never before seen

[@ShouryaSatvik]

really an amazing project!!!!!

[@juslitor]

interesting how the led die shows up as a slight u shape in the projected light dot

[@king_james_official]

if you already have the optical endstop, why bother with a stepper motor? you could use a regular dc motor (or bldc) with a mosfet for control. then you just calculate the time elapsed between last rotation when you get an interrupt (since i guess that delta time is what you need)

[@xanokothe]

Oh pretty good result. How about increase the resolution with more frequent holes or increase the size of the wheel?

[@TomS699]

Amazing once again

[@kxdsh]

I'm curious as to how logie baird and the lads back then were able to produce images. like how did they make the light source flash/dim fast enough. How did they produce the signal to display imagery. fascinating stuff

[@jongdt]

Wow impressive build 👍

[@ImpossibumPlays]

That's a cool project. I can't help but wonder how much of a gear ratio you could manage with that NEMA motor to max out your fps. And of course, we need to biggify it! :) Good job, keep the fun projects coming!

[@neru_d]

Amazing stuff! Of course it had to be Bad Apple... :D

[@aviationodyssey1892]

Wonderful! I love it

[@andymouse]

Awesome work ! sterling stuff !

[@pypes84]

A lot of paper has OBA's to make them "whiter than white" that fluoresce under UV. Maybe try a paper screen.

[@GHILLIESARCADEANDMORE]

Cool i hope to see more on this project

[@racemouse5014]

Thanks for great content. You're an inspiration !!

[@christianlingurar7085]

awesome! how about old-school laser printer mirror (prism) polygon(s) and laser-to-the-wall?

[@bitluni]

something better is coming

[@DavidPlass]

It "plays" Doom. Approved.

[@kataraluna8417]

usea pwm motor instead of stepper? then just sync with the optic sensor?

[@Lionstarr86]

Nice Projekt 😮

[@roboman2444]

The microcontroller (or webapp) needs to do some correction for the "skew" caused by the left side of the screen being a smaller diameter than the right.

[@Xlaminator]

Great project! Amazing :)

[@TheStuartstardust]

Would it be possible to have like 8 leds and divide the screen into 8 segments? - then you could increase fps without more speed or get more resolution. Cool project 🤓

[@MadScientist267]

Yes there are already what amounts to the inverse... a line of LEDs spin and draw an image. You would see the same image if you put the array behind an appropriately formatted Nipkow disk.

[@dav1dbone]

be a laugh having this as your only tv set and tv licencing turn up

[@ewfreg5nythyhtewt4w]

I'd use a BLDC motor to get higher stable speed of rotation

[@QuadPrime]

Hola, the Link to the stepper schematics is dead. Nice project!

[@flos251]

How about an XXL version?

[@MrFilmar-ur5kv]

Love this video, i tried making my own the centrifugal force broke the disc. :(

[@MadScientist267]

Lol yep there's a reason these things didn't get any bigger than about an inch screen.

[@ExploringNew1]

I tried this too, only managed to my make a 5x5 dot matrix but still it was so sensitive to wind

[@buggi666]

this is so cool!

[@ewfreg5nythyhtewt4w]

why the ancient l298n was selected as a LED driver, are there any benefits?

[@dietherdave37]

I WANT A BAMBU LAB PRINTER BUT CANT AFFORD ONE HERE IN THE PHILIPPINES T_T

[@ShellacScrubber]

Superb !

[@verebellus]

this is awesome

[@NilsRohwer]

Very very cool

[@michallukaszek]

Not being Rick-rolled is a change :)

[@thilinamedia6910]

No rick rolling this time😂

[@BRUXXUS]

That was the original testing image and video during the streams. Hahaha

[@MadScientist267]

The true test of anything is the ability to play Doom.

[@GioEarthling]

Amazing!

[@2000jago]

Now that's what I call a Bit Looney...!

[@jiinkC]

gear ratio for 120 fps?

[@roelandriemens]

Next week a 4K version😂

[@TheFirstLayer-jc2ye]

thats interesting

[@mostafagaberahmed6657]

just use normal DC Motor with High RPM, better than stepper motor

[@andycrask3531]

Rgb next then

[@DFaulkner0]

Neat!

[@genetix250]

👍

[@markusgranberg8004]

Now play doom on it!

[@MadScientist267]

9:48 has your concept quite literally in play.

[@KWang_12]

of course it's bad apple

[@drstefankrank]

What about a laser cut steel sheet mounted to an angle grinder motor for higher rotational speed? ;)

[@SirEngelmann]

Hey Bitluni, I really love this project and I enjoyed watching the build process. I was however slightly worried about the used power supply. In general, I am extraordinary cautious of which SMPS to trust, because many lack sufficient inter-winding isolation in the transformer (or elsewhere, this one here has mains voltage in the switch portion of the rotary knob) or a VDE certified class Y capacitor or just get too hot. @DiodeGoneWild has made a teardown video of this power supply and showed that it is a bit on the dodgy side. I would prefer proper (more expensive, for sure!!) power supplies from major brands like mean well (not affiliated). I know though that I tend to worry too much about power supplies. Greetings, Vielen Dank für die vielen kreativen Ideen und Videos!

[@makegrowlabrepeat]

Someone tag WilliamOsman2

[@xxJoeCraftxx]

my first reaction seeing this