Sound transfer... BY LASER : DIY Experiments #3 LASER light music wireless
Ғылым және технология
• Link of our Facebook page : / diy.experiments.youtube
• Text of the video :
Hi everyone, in the video we’ll transmit a music using a LASER on 442 meters. We invite you to watch the video in its integrality because we are first going to present our creation and try on a short distance then we will try on a very large distance. At least we will explain how is work and do some tests with the LASER’s power.
To transmit a music we need an emitter, a receiver and between both, as you guessed, a LASER beam. Concerning the emitter we will explain to you how it works at the end of the video. Using it is pretty simple, we plug the jack to a device, here we have a switch to light the LASER and here we can choose the modulation level, from low to high with an intermediate. To aim the receiver which can be really far we need an extra high precision, that’s why we’ve created a stuff precise at a 77th degree from top to bottom and from left to right.
Currently the receiver is a guitar amplifier with a high gain, it is linked by jack to a mini solar panel. The LASER we use has a 250 mW power, which is about 200 times more than classical LASER trackers. In order to see the LASER beam on the camera we use a mini fog machine.
We have separated devices within a few meters, we set the amplifier on a 10th of the maximum volume…
A quick test with the synthesizer…
On the LASER we have the possibility the use a lens to change the light propagation angle. However after 442 meters even with the smallest dot possible it is never under 10 cm large. To remediate, we use a solar panel block composed with four little solar panels on derivation, we can put it this way.
Now, we are going to try the transmitting on 442 meters. We have to bring the emitter to our friend Kevin who lives there. Ok, we are at Kevin’s, the emitter is set up, the LASER is put on the maximal power then we just have to aim with the best accuracy one of those houses!
After a quarter of an hour at least, it’s done. Let’s start music and plug in the jack, modulation level is maximal, let’s go for the transmission!
Here is what we can see 442 meters away! The LASER is very bright even with the sun. Good job, we can see a red dot on the wall where we’ll put solar panels. Solar panels are directly linked to this 250W amplifier. With the high gain of this stereo, small light variations are very well transposed!
All is ready, let’s start the emitting… And it works!
Bad luck, because of a pine just in front of the LASER we have strong volume variations. We’ve put the solar panels a little bit higher, let’s try with max volume!
Please, Kevin,, move your fingers just in front of the LASER beam. Ok, that was predictable!
We can notice that with the volume max we hear a sound about the wind one especially on long distance like here. This sound comes both from dust in the air and turbulences linked to heat.
To create the emitter we used only basic and recovered electronic components. It is the same for the wooden planks. Nevertheless, we bought the LASER on eBay but you can also craft a powerful one with a DVD writer and lens. The concept is based on the variation of the LASER’s power at the rhythm of the music. The easiest way to do this is to use a ferrite core with two wires. This way the alternating current from the music will cross the ferrite core and impact the LASER’s power. This principle is workable until a 5mW LASER but no more because the modulation level is very low. In the actual project we use a 1 to 25 ratio transformer follower with a bipolar transistor. As a result the music variations are strongly amplified. The LASER is used at 80% of its maximal power so when there is a positive impulse it light brighter and less bright with a negative musical signal.
On the other side it is simpler. The solar panels are constantly producing power due to the LASER or the sun. This continuous power is eliminated by the amplifier’s filter. It is only the variations of light from the LASER that are amplified so we can hear the music. Obviously, between the emitter and the receiver, the musical signal is transmitted at the velocity of light. Contrary to fiber optic networks the transmitting is only analogical, and the signal is necessarily damaged.
We also use a 5 V regulator in used to allow the LASER to light as bright no matters the battery state of charge. By the way our lead battery holds hours of transmission.
Пікірлер: 463
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!
@Dubswitcher
6 жыл бұрын
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.
@bambino16
5 жыл бұрын
@@matemana1991 but chinese doesnt have youtube only by vpn
@MohamadKaakati
4 жыл бұрын
@@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.
@bambino16
4 жыл бұрын
@@MohamadKaakati damn 6 months ago a half year. Time is speeding up...
@abhishek-zd5hn
4 жыл бұрын
@@bambino16 bitch English is global language not Chinese
This is a great video and idea. I LOVED that you played the Stones! Very well done, guys.
Very awesome !!! I love the simplicity of the setup. And it seems to work very well, great job !!!
The sound is crazy good! Also, that humming and hissing adds a really good effect!
This is so awesome! Great work man! You deserve more recognition
the schematic at the end is what earned you another sub. and thanks mike
Your journey from your house to your friend's house was the best part of the video :P
Surprisingly good quality at that distance!
Awesome! Great sound!
@radicalrightwing
6 жыл бұрын
Yes. With a quality amplifier and huge speakers, of course.
Basically a fiber optic cable. Without the cable part.
@CharlesStawell
6 жыл бұрын
yeah, run a digital signal through it, do it both ways, and you've got yourself a point to point network connection...
@sebbes333
5 жыл бұрын
Basically a wireless wire ;P
@oranggilamahbebas9867
5 жыл бұрын
Basically electronic
@DonQuixoteLE
5 жыл бұрын
Basically how to
@Artificial.-_-.intelligence
5 жыл бұрын
Basically internet
5:18 "Doc, I'm late for school"
Awesome experiment! I am going to try it as well. Thanks for the great video.
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 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.
Laser bathroom partayyyyyy! Awesome job guys!
absolutely awesome, especially for transmitting information
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
Great project, guys!
saw this idea way back in science magazine. want to do it one day.
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👍👍👍
@jitu1973
3 жыл бұрын
its called laser microphone
Excellent video. Very interesting and you made it entertaining too. Thank you.
Great work, guys! Keep it up :)
I like it! Got try this. Cheers great video demo.
Impressive and nice work on the video.
This is amazing! Even at long distance!
Pretty amazing to get that frequency response out of that long transmition.
@BlokeOnAMotorbike
3 жыл бұрын
it's a lightwave carrier, we're talking frequencies of 4.74*10^14 Hz
Really good video ! :D
snuck in a lil metronomy, niiiice :D great video, very interesting!
Haha so awesome!
This is amazing! I really wanna try this. If I do, I'll make a video on it!
#1 Epic Sax Guy #2 Power of Love from Back to the Future
I done this about 10yrs ago. Been thinking of sending video over laser. Might do that one day
That is incredible.
Excellent work....
fantastic vídeo bro i love it..thx..
Great idea!
Wow! Just......WOW!!!
Amazing!! Never seen something like that before!!
@_who_cares_1123
8 жыл бұрын
Will you put this in your next time Machine, Doc?
@JordaoDM
8 жыл бұрын
+_who_cares_ Sure!
Awesome. That's all I could say.
Inventive and creative, bravo! 2 back to the bright Future?
wow!! this is totally awesome!
Great video, the sound was very clear! & Great choice of music btw! (Stones)
@DIYExperiments
7 жыл бұрын
+Scott x : Thanks !
@JoseGranny
7 жыл бұрын
Benny Hill! Lol!
@yusriledmodo6598
7 жыл бұрын
Laser Price ? all Price ?
WOW, Thats super coooooll!!
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...
@radicalrightwing
6 жыл бұрын
IR LEDs are cool since you can't see them (without a video camera), but strong lasers go much farther.
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.
When Epic sax guy kicks in, you cannot make it wrong.
Ingenious
Wow kids are pretty smart now a days.
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?)
@EliteTester
7 жыл бұрын
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
@religionbuster7180
5 жыл бұрын
actualy signal itself is always analog in nature. modulation is what makes it analog or digital
@jitu1973
3 жыл бұрын
sending digital signal over laser will be much easier... long distance benifit
Thanks brother,👍👍👍👍👌👌
: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.
Wow!
En Français , en Anglais,... bon... très intéressante video, j'adore.
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.
i love this .
excellent video
!!! awesome dear
im going to subscribe because of this awesome video
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.
@jitu1973
3 жыл бұрын
think they can use something like 9w led bulb back side of telescope sending voice or any data over miles of distance XD
absolutely innovative!!
Nice video.
Great
Молодцы :)
only the intro made me subscribe
5:35 This bit is amazing, you just made a Wind Lidar that costs at least a thousand times cheaper than the commercial ones.
Amazing
thank you
impressive
I have built one with a class d amplifier, an audio transformer, and a cheap green laser. Works like a charm!
@vijayambavanekar2578
5 жыл бұрын
Bahka, Can you share the circuit diagram? Which amplifier and which audio transformer? I am trying to build this as a hobby.
@imnotbeluga007
Жыл бұрын
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!
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.
Love some Back to the Future and Benny Hill spots
Nice
Marty McFly blown up my AMP. reference 2#
NOICE baguette!
@DIYExperiments
4 жыл бұрын
Noice clicheyyy!
It's great
Hello, I loved the video for it was beneficial and easy to follow. I would like to know how to adjust the circuit to send a video? I have a general idea of the main changes but not sure how to compute them and what components to use. Thank you in advance
WOW :)
@DIY Experiments can you say me which Transformer did you use?
Wow! can you get the Lazer to pin point? I am recreating the first time travel vessel-The Whirl Wind Man
Cute cat :3
I saw this at LIGO in Hanford WA
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.
😍✌️
It's like power transmission ⚡
Cool. How about transferring data at long distance
Believe you are referring to the Rio music video by the band Duran Duran!
Wow
ohh thanks
is it posible to make a short range one with say a flashlight laser or the ones on a pen
What is the voltage and amplitude of the audio output transformer?
Great DIY. pls share plans in pdf.
Wow you transmitted sound from laser
It's been cca 15 years ago, when i read about university demonstration of a technology, that uses laser to carry sound, but it worked in a way, that whatever the laser touched, started emitting the sound. For example, the author of the technology connected his device to a discman, then aimed the laser at a person in the crowd, and only the person in the crowd started hearing what was being played on the discman. Now THAT's a tech i'd like to know how to make... But cool video anyways...
nize zcreassion for zthe muzik :)
Very good experiment, could you please send the electrical circuit board
THE SUN IS A DEADLY LAZER
@ 4:55, epic sax jam !!!!!!
try sending SSTV images! that would be pretty cool xD
@_roman420_old_acc2
4 жыл бұрын
high speed internet would work too