Thanks. I might make a televisor at some point. It's quite a simple construction. A camera on the other hand is very challenging to make, because of low light entry
@GlevoTec --- What's the best video you can expect from a mechanical television if it were made today? Like if a company was willing to throw a few million dollars into it?
thank you for that. also, i would love to see a video on how the image was transmitted from studio to customer, if someone can point me in the right direction
They could get Images on their by getting the signals to make the lights turn off and on every quickly and would be darker or lighter depending on the light sensor
As others have stated, this is very much a broadcast technology and not a prerecorded media technology. It really wasn't until the VCR that home recording was a thing.
Instead of scanning the image line by line, it is possible to capture the entire frame? I mean, not a frame composed by lines and pixels, but the entire frame at one time.
That would mean you need to have thousands of separate sensors to capture everything and process everything in parallel. Very complex, impractical and expensive
Great stuff. My only question is, did they have to physically distribute those spinning disks? This isn't the case where television was "broadcasted" yet, correct?
The disc is part of the televisor device and is just a scanning mechanism that makes the image possible. The actual video signal was broadcasted indeed
@@GlevoTec Ah, so the "broadcast" was actually just information on when/how bright the light will be shown through the holes to the receiving TV? Brilliant!
@@cohara7516 Exactly, that's correct. The signal was nothing more than a brightness changing over time to correspond with the scanning lines of the spinning disc to turn it into an image. Quite brilliantly simple indeed
The "persistence of vision" is one of the longest standing myths. The neurological basis of vision (which happens in the brain, not the eyes) is where you should look into (pun intended) if you want to understand, although it is more complex than "a defect in your eyes is the reason cinema exists!" But thanks for the effort in your video nonetheless.
The pattern is just so that each hole shifts a bit compared to the previous one. So that the full window/screen is scanned in 1 rotation of the disc. Basically it's the full circle divided into as many parts as there are scanning lines. So in my example : 8 holes, 8 parts where the hole is shifted one position from the previous hole.
@@GlevoTec This is why Baird's "televisor" definitions (resolutions) increased in this way: 30 -> 60-> 120-> 180-> 240. The spacing of the holes and distance of each hole from the centre of the disc were easy to work out once the initial calculations (for 30 lines) had been made. It took Baird until 1941 to get to anything like a 600 line colour TV system, by which time TV was impractical for the duration, large parts of London had been blitzed and plans had been put in place to revive and possibly extend the electronic Marconi-EMI system (405 lines) when the war was safely over.
@@anonUK No, the Hankey Committee of 1943 recommended that the 405-line b&w service be restarted only temporarily, pending introduction of 1,000 lines with color and possibly stereoscopy. Baird was the only private witness heard by this committee, which in effect rejected Marconi-EMI for the Telechrome. The postwar government decided that re-engineering would be too costly when an almost bankrupt Britain was struggling to rebuild, and the chance to have a 1980s hi-def service in the 1940s was lost.
Any tv can get a signal with an adapter. My great grandparents had an 80s tv set and one from the 60s or 70s and my dad had some really old TV he got for cheap that was black and white have no idea how old that was
Why did you not show a real one working. Thats what i wanted to see. I already know how it works. It is also called a flying disc or scanning disc camera/television.
If you already knew how it works, why would you click on a video that says "How does mechanical TV work" then waste time making an angry comment when you could've just searched for "Mechanical TV demonstration?"
@@danem2215 stop reading between the lines. Do you have issues? If so, then I am sooo sorry to have pushed some defensive button of yours. I was just saying. There are many demonstrations of mechanical television, yes . I was just hoping to see maby someones own personal project mechanical flying disc camera and display. Like at science fares it's always fun to see another's approach to an old tech. Often new ideas come from reexamining old ones. Don't be so negative and defensive. Everybody's not out to get/troll you or the thingscyou like. Honest. Also what good is an explanation on Utube without a demonstration ! Seriously this is a video show&tell website. Isn't it ? Lets really teach otherwise it's a waste of time. G-day.
@@michaelshultz2540 "Do you have issues?" -Guy pissed off "how does x work" shows how x works and sends a wall of text in response to his stupidity being called out.
