юные умы должны знать что если кинескоп хватать лапами когда там сохраняется заряд в несколько киловольт уже много раз кончалось летальным исходом. причем такое бывало даже с опытными ремонтиками
@@Galova Please stop scaremongering people like this. Why do so many people act like this now? At least tens of thousands of people have worked with CRTs for years and are not dead because of it. Deaths from shocks are infinitesimal. It isn't designed as a killing machine! There are three points that could give you a nasty shock; Transformer, end of the tube, anode; but it IS NOT likely to kill the average healthy person and is easy to avoid. Also yes, always discharge the tube even if it has a bleeder. I'm sure pou don't go around telling people that sticking their fingers in a wall socket could kill them!
While your video is nicely made, when explaining to people how to put their hands on CRT circuits, please never forget to warn them about the dangers of really high voltages present on these circuits! You obviously know where not to put your fingers, like for example the solder points near the flyback transformer, high voltage capacitors, or the neck board where some high anodes voltages (at least a few hundred volts) are present... Also a warning about the voltage present under the anode cap (probably over 10kV) would be welcome. Someone who might not be aware of the high voltages present would get a nasty surprise if getting too close to dangerous points of the circuit or trying to take things apart without proprely discharging (even if well designed circuits have resistors to self discharge). Also... keeping a bright static focussed dot on the screen like that will pretty quickly burn the phosphor in that spot, something like a few seconds would be enough to have some damage. Never ever keep a bright spot (or even a bright small line or something) in a static position on a CRT tube, at least lower the brightness. It will irreversibly burn in! I managed to burn a few spots on a good tube once, working on CRT clock circuits, and I was careful...
I wonder if it’s possible to assemble a device on some Cortex M4 that will control the ADC, create a frame buffer in its RAM, then output this frame through the built-in DAC to an RF modulator and thus generate a ready-made signal to feed it to the antenna input of the TV? I think this is a much more interesting and versatile idea than destroying a working CRT TV. After all, in this way it will be possible to immediately draw a grid on the screen and display the values of vertical sensitivity and sweep time in text form. Plus some additional information such as signal amplitude values, frequency, etc.😉
Turn off the Oscilloscope time-base and insert a sawtooth ramp generator and with that make a large screen Curve Tracer for vacuum tube and transistor testing/matching. Tv sets are ideal for this function, because of their large screen. Curve tracers for tubes are worth a fortune nowadays - if you can find one.
I built one in the 1970s, using an old 17" TV. Needed a few power transistors to drive the coils, though. Interesting video - pity about the commentary errors.
I always figured the magnetic deflection yoke would not be frequency-agile enough to make a real 'scope, but you could certainly make a "squiggle generator"!
I now this was the 'how to make an oscilloscope on a TV' thing but with a little more work you can make it display an XY vector as well. And before someone asks, no moving the coil whilst the tube is powered won't kill you. I wouldn't advise touching the anode though!
That is a good piece of equipment to pull that from. This exact circuit for Monochrome CRT is in countless products, flyback transformer and those two very interesting ICs. The equipment I pulled mine from was a radio hybrid with speakers, so the board was very wide and would have been inconvenient to mount. I was making a VCO from ICL8038 if anyone has heard of it and wanted to use it as a signal display just for kicks -- the board is too inconvenient :(
The impedance of these coils isn't very big so you can't measure every type of signal source. There are probably some more frequency limitations than the normal scope.
Of course. Horizontal deflection happens at 15 625 Hz and vertical at 50 Hz (PAL). You can go a bit higher, but horizontal 25 kHz and vertical 200 Hz is max.
Hey, I just want to say thank you for making this video. I love cathode ray tubes but I had no use for one, aside from the parts, and I also wanted to make a crt oscillascope so yeah, thanks! ALSO!! BEFORE YOU DO THIS, DISCHARGE THE SCREEN AFTER RUNNING IT EVEN FOR A BIT BECUASE THE SCREEN CAN HOLD LIKE 20,000 VOLTS/20kv!! AND IF YOU DON’T DISCHARGE IT YOU CAN BE SHOCKED PRETTY BADLY Edit: can you make a part 2? Also I don’t have most of the parts I need :( I have barely any soldering skills, no power supply, no signal generator, nothing😢
Аз съм правил няколко подобни осцилоскопи до 20 kHz. Но измерваният сигнал трябва да бъде над 3 V! Под 3 V сигнал няма да бъде показан коректно! За това трябва да се направят входен усилвател и делител на напрежението и времеделение, за да стане реален ниско честотен осцилископ! Освен от този тио телевизори, аз съм правил осцилоскопи от crt from viwer of VHS camcoder! Стават много малки аналогови ниско честотни осцилоскопи и ако му прибавиме елементарна приставка от две съпротивленуя ще може да се наблюдават характеристиките на полупроводниците - диоди, транзистори, високо честотни бобини и много други! Поздрави от България!
В детстве познал как устроен телевизор благодаря соответствующей литературе по их ремонту. И я делал такой осциллограф из телевизора времен СССР. Было очень увлекательно.
Аз в детстве съм имал само един български чернобял телевизор, който бащами всяка седмица ремонтираше, защото при нас напрежението беше различно и лампуте изгаряха! Но аз съм виждал истински осцилограф на баща ми ло70, който беше много интересен! Проблемът в тези осцилоскопи от телевизор, че без усилвател на напрежението и волт делител може да се използват само за проверка на полупроводници и индикатор на високоговорител! Аз съм си правил от немски мини телевизорпета и от crt от vhs виамери визиорът, който е 1 см диагонал и позволява да си направиш минитюрен аналогов осцилоскоп за тестване на полупроводници.. Здравейте, благодаря за мнението и поздрави от гореща и дъждовна в момента България.. Аз имам около 10 направени осцилоскопа и 6 аналогови и 3 дигитални осцилоскопи , но вече рядко се занимавам а това хоби!
@@killer1100101 Да а именно на кинескопе ЛК61. Не маленький такой осциллограф) Мне нравилось подавать на вход музыку и смотреть что происходит на экране, особенно в темноте. Использовался и для развлечений и для того что бы оценить сигнал. Например что бы при отладке УНЧ избежать искажения типа ступенька.
Когда-то была схема практически собрана, но до конца так и дошло, такие были там, где были специалисты. Была даже одна попытка использовать отклоняющие катушки, пока что-то не запахло.
Your lucky, a lot of TV's line output/EHT tend to not work when the horizontal coil is disconnected, sometimes a substitute inductor will do the trick though. Also be VERY sparing with the brightness, especially with only a dot shown, as you can easily burn a hole in the phosphor. (been there, done that)
Hej, interesting! I have a small CRT from a viewfinder. Is it possible to use this CRT like for a "scopewatch"? I mean instead of the oscilloscope I use this CRT?? Thanks for helping. Harry.
I have 2 questions How can I change the frequency of bem to see different range of hz And can I stop the waves by change the frequency to see the waves easily?
Sir can you make oscillator using only the crt tv components and second one also in that we using crytal oscillator and some npn transistors to oscillation and also provide all calculations please please please please please please
Wrong idea, because oscilloscopes work with electrostatic deflection! TV picture tubes are far too short for this, apart from the fact that the deflection plates are missing. They can only work with magnetic deflection. And what for? There should be enough discarded analog oscilloscopes on the market.
Fun fact, this damages the unit over time and causes screen burn because you're focusing all the energy into one spot. This is also a good way to get yourself killed if you have no idea what you're doing
Of course this is an educational video Disclaimer: WARNING! The shown videos are for educational & entertainment purposes only. Use the given information at your own risk. Do not work beyond your capability and always hire a professional if you are not sure what you are doing. Remember: Safety first!
Good evening, would It be possibile ti have this video translate into Italian? My old father is very interested in It, but unfortunately he can't read in Enghish! Thanks !
А для чого перетворювати телевізор в дуже низькочастотний і неякісний осцилограф? Якщо можна комп'ютер перетворити в якісний цифровий осцилограф, купивши до нього USB-приставку.
Tried this once on an old TV. Turned out, in Europe the high frequency high voltage transformer is connected to the horizontal deflection coil. When you cut this connection, there is no high voltage produced, no cathode ray hits the screen, everything is dead. 🙁
Thanks mate to sharing! I really liked! Just couple questions, first one, what about the high voltage around the screen? I am bit worried. Second one, how can I input some immagine or analog camera and use it like a screen when the CRT tv have not an Input like Scart or RCA Video? Thanks mate Gday Subscribed!!
No use for an electronic technicion if it convert this crt ,without Timebase circuitry e tc,etc ... It is impossible ,but can be experience and study the function of the deflection coil and the crt beem function inside a TV picture tube ....
Самая плохая идея, в кинескопе управление катушками которые имеют огромную индуктивность, к тому же там очень не линейно все, следовательно это подойдет только для демонстрации и не более
And yet another CRT to Scope video that totally misses the point of modding the Grid signal, ending up in having the RF Snow Video Signal still fed to the Grid, instead of a controlled Screen voltage to control brightness... Not asking for an Edge detection and Trigger, but the bare minimum for pete's sake!
it makes me cry music background while learning😢😭😭😭
Same😢
💀💀💀
😂😂😂
😅
😂😂😂😂😂😂😂😂😂😂😂😂😂😂
Akhirnya kutemukan video penjelasan yang sangat kuinginkan, membuat osilocope dari pesawat tv crt 😊, terimakasih videonya. ❤
Bravo.....I could have used this about 30 yrs ago........now oscilloscope are cheap.....great stuff.........cheers
I done this 40 years ago.
😍👌💛
Спасибо что вы показываете такой позновательный и обучающий видео для юных умов
юные умы должны знать что если кинескоп хватать лапами когда там сохраняется заряд в несколько киловольт уже много раз кончалось летальным исходом. причем такое бывало даже с опытными ремонтиками
@@Galova Please stop scaremongering people like this. Why do so many people act like this now?
At least tens of thousands of people have worked with CRTs for years and are not dead because of it.
Deaths from shocks are infinitesimal. It isn't designed as a killing machine!
There are three points that could give you a nasty shock; Transformer, end of the tube, anode; but it IS NOT likely to kill the average healthy person and is easy to avoid. Also yes, always discharge the tube even if it has a bleeder.
I'm sure pou don't go around telling people that sticking their fingers in a wall socket could kill them!
@@Galova Also 'kinescope ' instead of Cathode-Ray-Tube... that's going back a bit 😉
@@GarryGri traditional 'nick name' for this electronic component.
While your video is nicely made, when explaining to people how to put their hands on CRT circuits, please never forget to warn them about the dangers of really high voltages present on these circuits! You obviously know where not to put your fingers, like for example the solder points near the flyback transformer, high voltage capacitors, or the neck board where some high anodes voltages (at least a few hundred volts) are present... Also a warning about the voltage present under the anode cap (probably over 10kV) would be welcome. Someone who might not be aware of the high voltages present would get a nasty surprise if getting too close to dangerous points of the circuit or trying to take things apart without proprely discharging (even if well designed circuits have resistors to self discharge).
Also... keeping a bright static focussed dot on the screen like that will pretty quickly burn the phosphor in that spot, something like a few seconds would be enough to have some damage. Never ever keep a bright spot (or even a bright small line or something) in a static position on a CRT tube, at least lower the brightness. It will irreversibly burn in! I managed to burn a few spots on a good tube once, working on CRT clock circuits, and I was careful...
Thank you for your thoughtful comment. Safety is always a priority and I will make sure to include more safety details in my future videos.
I wonder if it’s possible to assemble a device on some Cortex M4 that will control the ADC, create a frame buffer in its RAM, then output this frame through the built-in DAC to an RF modulator and thus generate a ready-made signal to feed it to the antenna input of the TV? I think this is a much more interesting and versatile idea than destroying a working CRT TV. After all, in this way it will be possible to immediately draw a grid on the screen and display the values of vertical sensitivity and sweep time in text form. Plus some additional information such as signal amplitude values, frequency, etc.😉
Turn off the Oscilloscope time-base and insert a sawtooth ramp generator and with that make a large screen Curve Tracer for vacuum tube and transistor testing/matching.
Tv sets are ideal for this function, because of their large screen.
Curve tracers for tubes are worth a fortune nowadays - if you can find one.
I love oscilloscopes, I love this video I love you. I almost cried. Thank you
I built one in the 1970s, using an old 17" TV. Needed a few power transistors to drive the coils, though. Interesting video - pity about the commentary errors.
Simply Brilliant !!!
This project is very good!
I'd like to see the Amp connected, it would be interesting.
I didn't understand what you mean exactly
@@inventorkr1 😊¶∆\😅
We ❤
Eu acho que ele quis dizer que era para conectar a saída de um amplificador com uma senóide, para ver como se comportava.
I always figured the magnetic deflection yoke would not be frequency-agile enough to make a real 'scope, but you could certainly make a "squiggle generator"!
Super cool! When I think of all th TV's I've stripped down, just for parts, now I'm all out. I'll have to get one just to try it.
I now this was the 'how to make an oscilloscope on a TV' thing but with a little more work you can make it display an XY vector as well.
And before someone asks, no moving the coil whilst the tube is powered won't kill you.
I wouldn't advise touching the anode though!
So cool 👍😎
That is a good piece of equipment to pull that from. This exact circuit for Monochrome CRT is in countless products, flyback transformer and those two very interesting ICs. The equipment I pulled mine from was a radio hybrid with speakers, so the board was very wide and would have been inconvenient to mount. I was making a VCO from ICL8038 if anyone has heard of it and wanted to use it as a signal display just for kicks -- the board is too inconvenient :(
awesome for science demonstrations.. greetings
Paráda to jsem měl vědět dřív.
The impedance of these coils isn't very big so you can't measure every type of signal source. There are probably some more frequency limitations than the normal scope.
Of course. Horizontal deflection happens at 15 625 Hz and vertical at 50 Hz (PAL).
You can go a bit higher, but horizontal 25 kHz and vertical 200 Hz is max.
glad to see this interesting lesson . thanks much.
You are amazing ❤❤❤ super channel
I appreciate your comment, your support is important to me
Bacana bom para aprendizado.
Hey, I just want to say thank you for making this video. I love cathode ray tubes but I had no use for one, aside from the parts, and I also wanted to make a crt oscillascope so yeah, thanks!
ALSO!! BEFORE YOU DO THIS, DISCHARGE THE SCREEN AFTER RUNNING IT EVEN FOR A BIT BECUASE THE SCREEN CAN HOLD LIKE 20,000 VOLTS/20kv!! AND IF YOU DON’T DISCHARGE IT YOU CAN BE SHOCKED PRETTY BADLY
Edit: can you make a part 2? Also I don’t have most of the parts I need :(
I have barely any soldering skills, no power supply, no signal generator, nothing😢
Nice hack 👍👍👍
thank you my friend
@@inventorkr1 thanks I learn a lot from this video about CRT tv screens
I can do this modification in CRT computer screen
Аз съм правил няколко подобни осцилоскопи до 20 kHz. Но измерваният сигнал трябва да бъде над 3 V! Под 3 V сигнал няма да бъде показан коректно! За това трябва да се направят входен усилвател и делител на напрежението и времеделение, за да стане реален ниско честотен осцилископ!
Освен от този тио телевизори, аз съм правил осцилоскопи от crt from viwer of VHS camcoder! Стават много малки аналогови ниско честотни осцилоскопи и ако му прибавиме елементарна приставка от две съпротивленуя ще може да се наблюдават характеристиките на полупроводниците - диоди, транзистори, високо честотни бобини и много други!
Поздрави от България!
В детстве познал как устроен телевизор благодаря соответствующей литературе по их ремонту.
И я делал такой осциллограф из телевизора времен СССР.
Было очень увлекательно.
Аз в детстве съм имал само един български чернобял телевизор, който бащами всяка седмица ремонтираше, защото при нас напрежението беше различно и лампуте изгаряха! Но аз съм виждал истински осцилограф на баща ми ло70, който беше много интересен! Проблемът в тези осцилоскопи от телевизор, че без усилвател на напрежението и волт делител може да се използват само за проверка на полупроводници и индикатор на високоговорител! Аз съм си правил от немски мини телевизорпета и от crt от vhs виамери визиорът, който е 1 см диагонал и позволява да си направиш минитюрен аналогов осцилоскоп за тестване на полупроводници.. Здравейте, благодаря за мнението и поздрави от гореща и дъждовна в момента България.. Аз имам около 10 направени осцилоскопа и 6 аналогови и 3 дигитални осцилоскопи , но вече рядко се занимавам а това хоби!
@@mustneverdie из ч\б однолучевого?
@@siiv7973 Привет жаркая и дождливая Болгария! Отличное у вас хобби!
@@killer1100101 Да а именно на кинескопе ЛК61. Не маленький такой осциллограф) Мне нравилось подавать на вход музыку и смотреть что происходит на экране, особенно в темноте. Использовался и для развлечений и для того что бы оценить сигнал. Например что бы при отладке УНЧ избежать искажения типа ступенька.
My friend... The Cool...
Good luck sir 🎉
😄😄😄 Very good electronic project.
I hope you enjoyed watching
Nice been thinking about doing this to have a compact battery powered crt scope with me
Super cool!
Maybe we can obtain Lissajous waveforms if we connect two channels of the FG to horizontal and vertical deplexion coils 😧
Когда-то была схема практически собрана, но до конца так и дошло, такие были там, где были специалисты. Была даже одна попытка использовать отклоняющие катушки, пока что-то не запахло.
great information
A video of making usable memory with two or more CRTs would be really cool.
I Hope to get a schematic diagram for this crt TV 5.5. Thanks for your good job.
Very interesting idea, but finding small crt tv's like the one shown are getting hard to find.
bravo..your video was very beautiful
Yo lo hice hace años, cuidado con la alta tensión en la pantalla
Nice proyec . 👍. I have one with an old phosphor computer screen. 😃👍.
I had 5.5 inch portable but when i remove deflection coil wires didnt turn on
The system is different from this TV
Good idea
привет Вам из России! Большое спасибо!
Really wanted to see how you get a dark trace on a light screen.
Your lucky, a lot of TV's line output/EHT tend to not work when the horizontal coil is disconnected, sometimes a substitute inductor will do the trick though.
Also be VERY sparing with the brightness, especially with only a dot shown, as you can easily burn a hole in the phosphor. (been there, done that)
@ 6:30, you mean 90 degrees
SUPER 😮
I has similiar tv but doesnt work. My question is does crt flyback need to be high frequenzy to drive crt or can be just high voltage transformer?
what is the tv you used ? im looking for such a small and pretty one as well
А как определить частоту и амплитуду по такому осциллографу?
ну надо как-то калибровать , потом наклеить прозрачную сетку
Нужно подключить ещё вольтметр и частотомер! :))))
Good..❤
Hej, interesting! I have a small CRT from a viewfinder. Is it possible to use this CRT like for a "scopewatch"? I mean instead of the oscilloscope I use this CRT??
Thanks for helping.
Harry.
I have a small television to open the door and the sound comes out faint, why?
What about discharging the tube?
I have 2 questions
How can I change the frequency of bem to see different range of hz
And can I stop the waves by change the frequency to see the waves easily?
Oh dear you just burnt a spot on the crt screen not ideal 😢
good
my regards
Where did you buy that tv
from eBay
7 watts of current...
Sir can you make oscillator using only the crt tv components and second one also in that we using crytal oscillator and some npn transistors to oscillation and also provide all calculations please please please please please please
What is the backround music?
What frequency would be max?
about 20 kHz
Do you know how to fix tv with blue screen ?
It is a blue monochrome CRT ?
YES
@@inventorkr1 woow that very rare!
90 degrees
Wrong idea, because oscilloscopes work with electrostatic deflection! TV picture tubes are far too short for this, apart from the fact that the deflection plates are missing. They can only work with magnetic deflection.
And what for? There should be enough discarded analog oscilloscopes on the market.
so, you can only see the shape of signals but not measure their frequencies, amplitude etc
🌟 Qual a qualidade e características de 1 osciloscopio desse?
😮geeek!!!
No geeks in historiy NO wheels NO Electronic
Fun fact, this damages the unit over time and causes screen burn because you're focusing all the energy into one spot. This is also a good way to get yourself killed if you have no idea what you're doing
Of course this is an educational video
Disclaimer: WARNING!
The shown videos are for educational & entertainment purposes only. Use the given information at your own risk. Do not work beyond your capability and always hire a professional if you are not sure what you are doing. Remember: Safety first!
Чтобы превратить телевизор в осциллограф , потребуется :
1. Осциллограф
2. ...
Good evening, would It be possibile ti have this video translate into Italian? My old father is very interested in It, but unfortunately he can't read in Enghish! Thanks !
use the subtext function and set it to "autotranslate" and select your language
Ce que tu as fait là, je l'ai fabriqué il y a 30 ans pour un night-club.
Τί τάσι δινουμε στα πηνεἶα ἐκτροπῆς;
Μποροῦμε να τα τροφοδοτήσουμε ἀπὸ ἐνισχυτές ἥχου (ὅπως LM386);
CRT дайте информация за цокъла и кой pin каква функция има.
Yesterday i found an roodkill crt and i made this whit it(:
I only have the crt tube ,no boards nothing it has , anyone could help me to power the tube and making some beams and wave on the tube?
А для чого перетворювати телевізор в дуже низькочастотний і неякісний осцилограф? Якщо можна комп'ютер перетворити в якісний цифровий осцилограф, купивши до нього USB-приставку.
Очевидно это уже история, но когда не было больших экранов, это был выход. Если поискать то можно найти занятия с его использованием
Can you please tell me it name?
32 inches oscilloscope is handy
Tried this once on an old TV. Turned out, in Europe the high frequency high voltage transformer is connected to the horizontal deflection coil. When you cut this connection, there is no high voltage produced, no cathode ray hits the screen, everything is dead. 🙁
I did that in 1985
Tem um cara chamado rodrigo que fez um com dois traços
Thanks mate to sharing! I really liked!
Just couple questions, first one, what about the high voltage around the screen? I am bit worried.
Second one, how can I input some immagine or analog camera and use it like a screen when the CRT tv have not an Input like Scart or RCA Video?
Thanks mate
Gday
Subscribed!!
@@egg99 Mostly the tube holds the high voltage.
No use for an electronic technicion if it convert this crt ,without Timebase circuitry e tc,etc ...
It is impossible ,but can be experience and study the function of the deflection coil and the crt beem function inside a TV picture tube ....
Two words... *Oscilloscope Music*
В семидесятых искал причину телевизора и его же использовал в качестве осцилографа
1:02 why is there high voltage leaking and shocking me? from mom.
Although at this point, You can buy a real Oscilloscope for less than a CRT TV lol
It's more about learning how to hack a CRT display
Your comment has already been answered
Самая плохая идея, в кинескопе управление катушками которые имеют огромную индуктивность, к тому же там очень не линейно все, следовательно это подойдет только для демонстрации и не более
Ancho de banda????
Всё понятно... Сразу стало...?
very cool
Make sure to only do this with a cheap portable B/W Tv, not a good CRT
why?
According to me its reading cant be 100% correct. I think🤔🤔
And yet another CRT to Scope video that totally misses the point of modding the Grid signal, ending up in having the RF Snow Video Signal still fed to the Grid, instead of a controlled Screen voltage to control brightness... Not asking for an Edge detection and Trigger, but the bare minimum for pete's sake!
👉👉❤❤👈👈
But, is this a color tv?
이거 나도 오래전에 해봤어요.
*Discharge CRT before you even consider touching it!*
Yes it's dangerous it can store high voltage ⚡
👍👍👍👍👍