the fact that you are french and still take the trouble to translate it to english, so the rest of the world can understand it, is commendable! thank you!
@@bambino16 I think what @matemana meant is, the most population reside in both China and India with over +2 billion of population both, regardless of other facts such as how they can or can not access youtube, on the other hand, I would like to thank that guys of this video, it was really informative and fun to watch.
I was only 17 years of age back in 1971, living in Kenya East Africa, in Nairob studying in Technical high school , I made a sound to light project, parts were so hard to come by in kenya, yet I managed to construct a project and won an award for doing so in a competition held at Kenya Science teachers Training college. battery operated lasers were not available even in advanced countries, let alone in Kenya, so in my project I used flash light or a 2.5volt torch bulb and a dish mirror, which converted the light from the torch bulb into a parallel beam of light, as long as the bulb is set in the middle of the curved mirror coated dish, at its focal length, just a few centimeters in front, the bulb is held there using stiff wire,. very similar to satellite dish and LNB is held in front of it by a stiff piece of bar, then you feed the bulb with a audio voltage signal from a sound source that can be your tape recorder or even iphone, but iphone will not be able to power the torch bulb easily due to its low power, assuming you are feeding the out put audio of a tape recorder connected to this bulb, not the speaker, the bulb will light up making it fluctuate in intensity according to the loudness of your music or sound signal, with rhythmic beat the bulb would also start to flash like as if it is kind of disco light modulated by sound signals, and by the varaying sound vocals and instruments , but wait, when the sound goes very quiet or at a whispering level, the bulb will cut off completely, because the 2.5v bulb will not light up at all when the voltage to it gets very low, like 0.5volts or less, it may barely even show any light, this means there will be so much distortion, so what you need to do is to use a transformer of 1 to 1 ratio, but whose primary and secondary windings resistance is approximately 8 ohms or more but not much more, e.g. anything between 8 ohms minimum to say 100 ohms max, then you take the output of the transformer and connect a 1.5v AA battery in series with the output of this transformer and connect it to a bulb, this time the bulb will light up even when there is no sound but it will glow constantly, when you play the music, it will start to modulate the intensity accordingly and this time even soft music passage will be reproduced perfectly without any distortion, we call this a bias signal, this will keep the bulb always light up, so this part is your light transmitter. Then on the receiving part, you need a convex lense, of about same diameter as your mirror curved dish, though it is not essential, as long as the parallel beam of light is falling on this lense, it will then focus this light into a converged point, you then hook up a photo transistor at this point and feed the connections of the photo transistors to a pre-amplifier, look on google and see a typical preamplifier circuit, you can then feed the output of this pre-amplifier into a big powerful speaker amplifier, as long as the beam is striking the lense, which you can even use one from an ordinary magnifying or reading magnifier of approx 50 to 100mm diameter, this project can transmit sound over a light beam for about 100 meters with no problems, only problem is daylight or sunlight affecting the photo transistor, so if these were kept in dark chambers then ambient light can stop influencing the photo transistor. When I made this sound to light project, I did it as a hobby, and obtained the idea from a physics book that i found in school library, so basically it was not my original idea but a scientific idea and practical guidance how to make it, and why you need a bias battery for the bulb, so I basically put a project together, apart from the thrills of constructing one and seeing it work perfectly well, and as you obstructed the beam it would stop the light signal reaching the receiver lense, and the amplifier would stop making the sound, it was like some fun just doing that, no one not even me would have been able to guess at that time what may be the purpose of such a project, indeed today there are hundreds of applications that run on light beams being interrupted to make security detectors to catch intruders, counting traffic flow, people counters, detecting cars arriving at gates for automatic gate opening, reading optical encoders, detectors, literally thousands of uses, but the biggest impact this kind of technology brought to us is the todays high speed fibre optic communications, sending thousands of independent channels of high speed TV signals and millions of broad band signals via fibre optic cables laid between continents, indeed satellites have their own advantage over fibre optics, each to their own merit, advantages and disadvantages, those who don't know, copper wire can and does also conduct sound and other electrical signals and communication signals but these electrical signals have limits, as opposed to light beam, with electrical signals you cannot transmit very many high speed channels due to stray capacitance that restricts bandwidth due to capacitance effect and also due to magnetic effect of current passing through conductors and causing cross talk through inductive effect but fibre optics can carry thousands of channels without cross talk. When I did this project in my school, the panel of judges asked me "but what is the purpose of this project, what practical used does it have?" and I was silent, at that time there were no uses for it to be honest, we (The world) had barely managed to make computers and other high tech communications and despite which they awarded me a 3rd price for the project as a technically advance project but I had no idea then how many different uses it could be put to, nor did that physics text book described what this sound to light project could do apart from transmitting sound over a direct line of path of light. still i guess someone first had to invent a round wheel before they even thought that one day there will be cars using four such wheels and travel at over 300Kmph . One [piece of technology can branch into thousands of other uses.
Hahaha😂😂😂😂, very nice, in the past when i was in military we take audio amplifier replaced the microphone through a beheadet germanium transistor( acted then like laser beam receiver). With the pointer we targeted the window of interest and arranged to recieve the reflection on transistor. In this way we was able to listen to conversations. Hope you dont use it this way😉. Laser was infrared. Nice done👍👍👍
Bravo ! j'avais vu une expo-science ou l'eleve transmettait sa voix avec une lampe de poche a courte distance 3 metres , c'était avant le laser il y a 50 ans. Votre distance et le filtre est super.
I would be interested in seeing a pure tone sent in at various frequencies and seeing what sort of information could be gathered from that as dust and air currents alter the frequency and aptitude.
Just incroyable!! Thanks. P.S. You should think about assembling and selling your configuration. We will be your first customers. Bonjour from Toronto Canada
:DI was thinking about doing double laser for stereo transmission but, I will try sending the optical audio signal to get stereo sound... I think this will be easier.
A great project ,Subscription earned! I was thinking,couldn't you deal with that background noise/light level using a filter over the solar panels like they do in an IR remote receiver so that all a IR remote sensor can see is the infra red signal.
+Nibras Adib : Solar cells are more sensitive with a Red dot, but it's possible too with à green laser ! Contrariwise, with a blue laser it doesn't work. Cells are designed most for IR waves.
Hey, sorry to bother again, i wanted to know the options that can be used as receivers for the laser light,. in this case you used a solar panel, may i know the options for other receivers that can be used in case solar panels are unavailable?
That is awesome! Imagine from one point of the planet ( point A) bounce off a reflective dish (Point B) to several or on receiver ( point C or C to Z100). If you could have it very tight it could prove to be the fastest way to movie information. Point A,B and c+ would be able to have the info at the speed of light instead of having to be ran threw so many servos, being bounced off a satellite back to a receiver than ran threw more stops before it arrives. Cool hope you get it to stay tight for longer distances.
you could transmit back and forth ,but it would have to be on the open optical path ,send receive , not multiplexing , re convert the signal back to digital then analog , you would need a switch on the sender to make it a receiver ?
I am hoping to build a similar 2-way photophone. Do you have any tips, and can you explain the logic behind the build? I also sent you a message a few days ago on facebook if you wouldn't mind discussing it there.
i am not 100% sold on this video....yeah, you can transmit sound thuis way...but the sound is way too crisp...the surrounding light should be picked up as well...so the audio usually isn`t that clear.....did u alter the sound in the video?? or is it fake?? or am i wrong??
Actually this is pretty good, but a solar panel is noisy. Use a LED that is tuned to the same color of light as the laser diode and it wouldn't have the same issues of interference from heat, other types of bright light, or, possibly even that tree. We're accustomed to Light Emitting Diodes being used as a light source, but they can also detect the same color light that they emit. When the same color of light is shined onto the diode, it generates a small current/voltage. In this way you can do basically the same thing as the solar panel, but it's excluding the interference from all those other sources.
The LED doesn't need to be 10 cm to catch all the information. Mirrors and lenses can be used to focus the 10 cm beam down to the appropriate focal length if you feel that having the entire 10 cm blotch will improve resolution. That said, audio information, such as this video shows, isn't contained in the 10 cm spot. Rather, it's contained in the speed at which the laser light is dimmed and intensified. The LED just needs to have resolution on a portion of that light to demodulate the signal.
But what Purple is trying to tell you is the area of the LED or phototransistor is much smaller than the beam, so the captured signal power will be much less, and the amplification and noise much higher. Solar cells are much cheaper than optics to gather and focus the light on an LED.
BEWARE! Cheap 532 nm green lasers may emit powerful IR light. This can permanently damage your eyes without triggering the blink reflex! And it is much stronger than the laser output!
+Arjuna Udupi Would need to build something to switch that laser pretty damn fast, also some good knowledge on modems and dsl, and obviously, electronic skills and money
the fact that you are french and still take the trouble to translate it to english, so the rest of the world can understand it, is commendable! thank you!
Henry van Megen Well, most of the rest of the world doesn't speak english OR french, but I know what you meant by it.
@@matemana1991 but chinese doesnt have youtube only by vpn
@@bambino16 I think what @matemana meant is, the most population reside in both China and India with over +2 billion of population both, regardless of other facts such as how they can or can not access youtube, on the other hand, I would like to thank that guys of this video, it was really informative and fun to watch.
@@MohamadKaakati damn 6 months ago a half year. Time is speeding up...
@@bambino16 bitch English is global language not Chinese
Basically a fiber optic cable. Without the cable part.
yeah, run a digital signal through it, do it both ways, and you've got yourself a point to point network connection...
Basically a wireless wire ;P
Basically electronic
Basically how to
Basically internet
5:18 "Doc, I'm late for school"
Awesome! Great sound!
Yes. With a quality amplifier and huge speakers, of course.
I was only 17 years of age back in 1971, living in Kenya East Africa, in Nairob studying in Technical high school , I made a sound to light project, parts were so hard to come by in kenya, yet I managed to construct a project and won an award for doing so in a competition held at Kenya Science teachers Training college. battery operated lasers were not available even in advanced countries, let alone in Kenya, so in my project I used flash light or a 2.5volt torch bulb and a dish mirror, which converted the light from the torch bulb into a parallel beam of light, as long as the bulb is set in the middle of the curved mirror coated dish, at its focal length, just a few centimeters in front, the bulb is held there using stiff wire,. very similar to satellite dish and LNB is held in front of it by a stiff piece of bar, then you feed the bulb with a audio voltage signal from a sound source that can be your tape recorder or even iphone, but iphone will not be able to power the torch bulb easily due to its low power, assuming you are feeding the out put audio of a tape recorder connected to this bulb, not the speaker, the bulb will light up making it fluctuate in intensity according to the loudness of your music or sound signal, with rhythmic beat the bulb would also start to flash like as if it is kind of disco light modulated by sound signals, and by the varaying sound vocals and instruments , but wait, when the sound goes very quiet or at a whispering level, the bulb will cut off completely, because the 2.5v bulb will not light up at all when the voltage to it gets very low, like 0.5volts or less, it may barely even show any light, this means there will be so much distortion, so what you need to do is to use a transformer of 1 to 1 ratio, but whose primary and secondary windings resistance is approximately 8 ohms or more but not much more, e.g. anything between 8 ohms minimum to say 100 ohms max, then you take the output of the transformer and connect a 1.5v AA battery in series with the output of this transformer and connect it to a bulb, this time the bulb will light up even when there is no sound but it will glow constantly, when you play the music, it will start to modulate the intensity accordingly and this time even soft music passage will be reproduced perfectly without any distortion, we call this a bias signal, this will keep the bulb always light up, so this part is your light transmitter.
Then on the receiving part, you need a convex lense, of about same diameter as your mirror curved dish, though it is not essential, as long as the parallel beam of light is falling on this lense, it will then focus this light into a converged point, you then hook up a photo transistor at this point and feed the connections of the photo transistors to a pre-amplifier, look on google and see a typical preamplifier circuit, you can then feed the output of this pre-amplifier into a big powerful speaker amplifier, as long as the beam is striking the lense, which you can even use one from an ordinary magnifying or reading magnifier of approx 50 to 100mm diameter, this project can transmit sound over a light beam for about 100 meters with no problems, only problem is daylight or sunlight affecting the photo transistor, so if these were kept in dark chambers then ambient light can stop influencing the photo transistor.
When I made this sound to light project, I did it as a hobby, and obtained the idea from a physics book that i found in school library, so basically it was not my original idea but a scientific idea and practical guidance how to make it, and why you need a bias battery for the bulb, so I basically put a project together, apart from the thrills of constructing one and seeing it work perfectly well, and as you obstructed the beam it would stop the light signal reaching the receiver lense, and the amplifier would stop making the sound, it was like some fun just doing that, no one not even me would have been able to guess at that time what may be the purpose of such a project, indeed today there are hundreds of applications that run on light beams being interrupted to make security detectors to catch intruders, counting traffic flow, people counters, detecting cars arriving at gates for automatic gate opening, reading optical encoders, detectors, literally thousands of uses, but the biggest impact this kind of technology brought to us is the todays high speed fibre optic communications, sending thousands of independent channels of high speed TV signals and millions of broad band signals via fibre optic cables laid between continents, indeed satellites have their own advantage over fibre optics, each to their own merit, advantages and disadvantages, those who don't know, copper wire can and does also conduct sound and other electrical signals and communication signals but these electrical signals have limits, as opposed to light beam, with electrical signals you cannot transmit very many high speed channels due to stray capacitance that restricts bandwidth due to capacitance effect and also due to magnetic effect of current passing through conductors and causing cross talk through inductive effect but fibre optics can carry thousands of channels without cross talk. When I did this project in my school, the panel of judges asked me "but what is the purpose of this project, what practical used does it have?" and I was silent, at that time there were no uses for it to be honest, we (The world) had barely managed to make computers and other high tech communications and despite which they awarded me a 3rd price for the project as a technically advance project but I had no idea then how many different uses it could be put to, nor did that physics text book described what this sound to light project could do apart from transmitting sound over a direct line of path of light. still i guess someone first had to invent a round wheel before they even thought that one day there will be cars using four such wheels and travel at over 300Kmph . One [piece of technology can branch into thousands of other uses.
Very awesome !!! I love the simplicity of the setup. And it seems to work very well, great job !!!
Hahaha😂😂😂😂, very nice, in the past when i was in military we take audio amplifier replaced the microphone through a beheadet germanium transistor( acted then like laser beam receiver). With the pointer we targeted the window of interest and arranged to recieve the reflection on transistor. In this way we was able to listen to conversations.
Hope you dont use it this way😉. Laser was infrared.
Nice done👍👍👍
its called laser microphone
Your journey from your house to your friend's house was the best part of the video :P
Surprisingly good quality at that distance!
the schematic at the end is what earned you another sub. and thanks mike
This is a great video and idea. I LOVED that you played the Stones! Very well done, guys.
This is amazing! Thank you for making this
Bravo ! j'avais vu une expo-science ou l'eleve transmettait sa voix avec une lampe de poche a courte distance 3 metres , c'était avant le laser il y a 50 ans. Votre distance et le filtre est super.
I would be interested in seeing a pure tone sent in at various frequencies and seeing what sort of information could be gathered from that as dust and air currents alter the frequency and aptitude.
snuck in a lil metronomy, niiiice :D great video, very interesting!
nice choice of music ! metronomy is great!
Just
incroyable!! Thanks. P.S. You should think about assembling and selling your configuration. We will be your first customers. Bonjour from Toronto Canada
Pretty amazing to get that frequency response out of that long transmition.
it's a lightwave carrier, we're talking frequencies of 4.74*10^14 Hz
The sound is crazy good! Also, that humming and hissing adds a really good effect!
wait you are transmitting an analog signal? :D When I saw the beginning I thought it wa digital! Amazing job! (You're french aren't you?)
they could probably transmit a digital signal but for one it would be a lot more complex and I don't know if a single lazer beam has enough bandwidth
actualy signal itself is always analog in nature. modulation is what makes it analog or digital
sending digital signal over laser will be much easier... long distance benifit
#1 Epic Sax Guy
#2 Power of Love from Back to the Future
This is so awesome! Great work man! You deserve more recognition
This is amazing! Even at long distance!
:DI was thinking about doing double laser for stereo transmission but, I will try sending the optical audio signal to get stereo sound... I think this will be easier.
Awesome experiment! I am going to try it as well. Thanks for the great video.
Très bien, félicitations !
Laser bathroom partayyyyyy! Awesome job guys!
absolutely awesome, especially for transmitting information
Great video man 🎉🎉
4:14 Song name?
have u tried spdif? then you will have audiophile grade audio in no time
Excellent video. Very interesting and you made it entertaining too. Thank you.
Wow kids are pretty smart now a days.
Great video, the sound was very clear! & Great choice of music btw! (Stones)
+Scott x : Thanks !
Benny Hill! Lol!
Laser Price ?
all Price ?
@DIY Experiments can you say me which Transformer did you use?
A great project ,Subscription earned! I was thinking,couldn't you deal with that background noise/light level using a filter over the solar panels like they do in an IR remote receiver so that all a IR remote sensor can see is the infra red signal.
Excuse me could you please give the materials required with their ratings
is it posible to make a short range one with say a flashlight laser or the ones on a pen
Hey, i really loved your video, I wanted to know if you could do this with a green laser, would there be any changes?
+Nibras Adib : Solar cells are more sensitive with a Red dot, but it's possible too with à green laser !
Contrariwise, with a blue laser it doesn't work. Cells are designed most for IR waves.
Great! Thank you, I shall keep that in mind, Thanks again.
Hey, sorry to bother again, i wanted to know the options that can be used as receivers for the laser light,. in this case you used a solar panel, may i know the options for other receivers that can be used in case solar panels are unavailable?
you could use a photoresistor
Ohh thanx a lot!
saw this idea way back in science magazine. want to do it one day.
Impressive and nice work on the video.
En Français , en Anglais,... bon... très intéressante video, j'adore.
WOW, Thats super coooooll!!
I done this about 10yrs ago. Been thinking of sending video over laser. Might do that one day
excellent video
Great project, guys!
Wow! can you get the Lazer to pin point? I am recreating the first time travel vessel-The Whirl Wind Man
5:35 This bit is amazing, you just made a Wind Lidar that costs at least a thousand times cheaper than the commercial ones.
can we use this laser to transmit any thing pls answer
Cool. How about transferring data at long distance
I like it! Got try this. Cheers great video demo.
Amazing!! Never seen something like that before!!
Will you put this in your next time Machine, Doc?
+_who_cares_ Sure!
That is awesome! Imagine from one point of the planet ( point A) bounce off a reflective dish (Point B) to several or on receiver ( point C or C to Z100). If you could have it very tight it could prove to be the fastest way to movie information. Point A,B and c+ would be able to have the info at the speed of light instead of having to be ran threw so many servos, being bounced off a satellite back to a receiver than ran threw more stops before it arrives. Cool hope you get it to stay tight for longer distances.
think they can use something like 9w led bulb back side of telescope sending voice or any data over miles of distance XD
Love some Back to the Future and Benny Hill spots
That is incredible.
im going to subscribe because of this awesome video
Excellent work....
fantastic vídeo bro i love it..thx..
When Epic sax guy kicks in, you cannot make it wrong.
what directions should the coil be wired?
What is that indie song you’re playing on the piano? I’ve got it in my playlist somewhere :/
Metronomy - The look
only the intro made me subscribe
you could transmit back and forth ,but it would have to be on the open optical path ,send receive , not multiplexing , re convert the signal back to digital then analog , you would need a switch on the sender to make it a receiver ?
Where you can buy the laser?
absolutely innovative!!
Can you transfer picture infomation through the laser
Very easy for transmitting audio signals with the easy and small setup. But complex with digital video signals. We are working on this for our FYP.
Bro wr did u buy the laser and can u provide information how to make this experiment
Great work, guys! Keep it up :)
I am hoping to build a similar 2-way photophone. Do you have any tips, and can you explain the logic behind the build? I also sent you a message a few days ago on facebook if you wouldn't mind discussing it there.
Very good experiment, could you please send the electrical circuit board
Marty McFly blown up my AMP. reference 2#
can we use this sought of laser as a switch
Could the same thing be done with a telescope?
Really good video ! :D
i am not 100% sold on this video....yeah, you can transmit sound thuis way...but the sound is way too crisp...the surrounding light should be picked up as well...so the audio usually isn`t that clear.....did u alter the sound in the video?? or is it fake?? or am i wrong??
other than audio can it send data?
That was very interesting.
i had also made the same about 3 years ago.. it's a cool experiment. I tried it with ir leds too...
IR LEDs are cool since you can't see them (without a video camera), but strong lasers go much farther.
Believe you are referring to the Rio music video by the band Duran Duran!
Actually this is pretty good, but a solar panel is noisy. Use a LED that is tuned to the same color of light as the laser diode and it wouldn't have the same issues of interference from heat, other types of bright light, or, possibly even that tree.
We're accustomed to Light Emitting Diodes being used as a light source, but they can also detect the same color light that they emit. When the same color of light is shined onto the diode, it generates a small current/voltage. In this way you can do basically the same thing as the solar panel, but it's excluding the interference from all those other sources.
yeah but is there a red led that is 10 cm in diameter?
The LED doesn't need to be 10 cm to catch all the information. Mirrors and lenses can be used to focus the 10 cm beam down to the appropriate focal length if you feel that having the entire 10 cm blotch will improve resolution.
That said, audio information, such as this video shows, isn't contained in the 10 cm spot. Rather, it's contained in the speed at which the laser light is dimmed and intensified. The LED just needs to have resolution on a portion of that light to demodulate the signal.
But what Purple is trying to tell you is the area of the LED or phototransistor is much smaller than the beam, so the captured signal power will be much less, and the amplification and noise much higher. Solar cells are much cheaper than optics to gather and focus the light on an LED.
hi its cool but i cant find the transformer where do i get one thanks
Thanks brother,👍👍👍👍👌👌
where did you recovered the transformer?
I have built one with a class d amplifier, an audio transformer, and a cheap green laser. Works like a charm!
Bahka,
Can you share the circuit diagram? Which amplifier and which audio transformer? I am trying to build this as a hobby.
BEWARE! Cheap 532 nm green lasers may emit powerful IR light. This can permanently damage your eyes without triggering the blink reflex! And it is much stronger than the laser output!
Hi, how about transmit audio within an infrared diod to be received meters away with an other infrared diod?
Already done in our French channel 8 years ago (we use a solar cell as a receiver, more surface covered than a photodiode).
!!! awesome dear
wow!! this is totally awesome!
Great idea!
what is the power output of this laser a the reciving end at 400 m distance from transmitter
Inventive and creative, bravo!
2 back to the bright Future?
Nice video.
what is the name of the solar panel ?
Whats the name of that keyboard song
same question /:
The Don Metronomy - The Look
w ear pon using laser, do you know this?
Great DIY. pls share plans in pdf.
Awesome. That's all I could say.
What is the voltage and amplitude of the audio output transformer?
Say if i want to go to 16000 meters.....higher power laser ?
next time use it to transmit wifi.... it wold be great...
+Arjuna Udupi Would need to build something to switch that laser pretty damn fast, also some good knowledge on modems and dsl, and obviously, electronic skills and money
+Arjuna Udupi It wouldn't be Wifi anymore, it would be LiFi, and it's already a thing.
Same concept as fiber-optic cabling, but open air.
+Arjuna Udupi That b great do a video |I like to see that if it works?
Ethernet over photons. Wow, ok.