Thanks Scott for putting effort into it and debunking the creator . It's going to help so many people .

The shift from cheery "it really works" to "no it doesnt" is majestic

Thank you Scott for debunking the creator As an Indian I have been recommended this channel by UKposts algorithm and I have been astonished by the level of projects on this channel In future we would appreciate if you continue such efforts so that young enthusiasts couldn't get misleaded

"And making it real". I'm glad I jumped streight to the end of the video and wasn't as disappointed as I would be watching the whole thing

VERYY thanks for debunking that channel As an Indian it quite bugged me cause that channel's videos were fake and clickbait but but people still liked his videos even after correcting in the comments

De-bunking!

Hey, if you're ever willing to revisit this project, try using a mirror to redirect the light rather than moving the whole laser. The mirror will be lightweight enough that you can use less chunky electromagnets and inertia will be less of a problem. IIRC, this is roughly the same concept real laser displays use. I also would say that for this specific design you may have more luck trying out a laser diode encased in plastic- I have one lying around and while it is rather dim (I think I might've partially broken it) it is super light compared to a bigger one encased in metal.

I learned that it's not as simple as it looks! Also, when I've seen laser displays in the past they have used a mirror on a gimbal with the laser being static. The mirror on the gimbal doesn't take nearly as much magnetic force to move as trying to move the whole diode does.

i already commented in his videos that he always make fek videos, now it is proven by our great scott, thanks

Nothing is more frustrating than following a UKposts DIY project step after step and ending without expected results,... A lot of fakes out there. Big thanks Scott

There's an old school version that's actually sound reactive in the most analog of ways where you take a laser pointer and point it at a small mirror attached to a Bloon stretched across a ring so that when sound vibrations hit the stretched Bloon it vibrates the mirror, changing the angle of reflection of the laser point.

Iv tried reporting his videos hundreds of times. UKposts just doesn't do anything. It is similar to the case of how mark rober debunked the fake drone video. It can totally crush the confidence of a budding electronics enthusiast

The easiest laser projector is made with a small mirror and two speakers for X and Y axis. It's not fast enough for oscilloscope-music, but you can draw easy things like circles, squares etc.

In my highschool years they had a laser display demonstration once. But the method they used was different. Instead of manipulating the diode itself, they bounced the beam off of mirrors mounted on speakers. Much simpler to make, much better control. Just play the right waveforms...

It makes more sense to suspend a very lightweight mirror and deflect that with smaller magnets. It'll still be clunky, but better than the original idea. You can get an infinity symbol by putting plastic wrap over a loudspeaker, gluing a small mirror in the middle of the plastic, bouncing a laser off the mirror from 45 degrees, while feeding variable frequencies from a function generator to the loudspeaker. Certain harmonics of the mirror's resonant frequency will generate shapes whose size varies with the harmonic value.

as an Indian and an ECE student I thank you very much for exposing him. also please review his recent video on mobile signal jammer. its a humble request, please

I know there is one guy something like "robotics kanti" his projects (including this one) are all like this, a mix of reality and video editions. It is very sad to see people liking the video and venerating this guy as if he was awesome engineer. Thanks for this channel for showing things with scientific background.

When people make scams like this, please NEVER give them links. Watching their videos even to criticise them makes them money

I love that the video image of the fake device working on the other channel used a flashing image on the paper rather than one that traces out the shape. It's all on or all off in a way that a vector laser image would not be.

Sometime UKposts algorithm gets it right. Just like you can't see a forest if you focus on a tree, it's easy to forget how big (and diverse/weird) UKposts is if you focus on the videos you subscribe to. I'm thankful I have you in my list, because I enables me to not even be aware that the lier's channel even existed.

Great work! You know you’re maturing when you decide that developing something fun wouldn’t be worth it. Thanks for your effort.

Neat idea! If you want cheap 'n' dirty shapes with a laser pointer you can always do that 'mirror on a membrane vibrated by sound' project - I had fun making circles and squares and lemniscates with different tones.

it would be much easier to have a stationary laser that's rigidly mounted to a set of actuators, and aim it at a spinning mirror that is canted to an angle. This would give a better result, as the mirror works as a "shutter" of sorts, and the laser focal point is always the same, and the laser only has to move very very minute distances...

Thank you for all the work you put into this. The difference between people who are easily led and people who actually know something.

Seems like a lot more trouble than just using two front surface mirrors and making a galvanometer from a couple of old speakers or just winding your own. That's how we did it back in the 70s, though back then we had to use gas discharge lasers from surplus electronics suppliers.

About 30 years ago I made something similar to this (that worked!). Difference was I directed the laser beam, not the who damn laser head (since.. you know... mass of photons vs metal - ha ha!). I had an old video laser disc player laying around that I robbed for parts. It used a red HeNe laser tube (pretty cool looking) and a couple of mirrors that controlled the beam. 1 for X & 1 for Y axis. I was just using what I had laying around - and this was way before Arduinos and the internet existed - so all I used was a stereo audio source. One channel connected to each axis. Certain music would give boring patterns, but Pink Floyd (for one) was awesome since they used such crazy mixing of the left & right channels. The laser was SO bright, I could shoot a pattern at my ceiling and get an 8- 10ft diameter pattern. I still have it, but haven't powered it up in at least 20 years. No clue if it still works even. I'll have to try it one day!

That's why your channel is good. I watched the entire video about a fake electronic project, knowing that it wouldn't work, but I still watched it 😅

this is a good one, please video more of this debunk videos! there are so many fakes on Tiktok, Insta, UKposts

I made something like that once, but it moved a little mirror instead of the diode itself. the coil was much smaller and closer, but with a high enough PWM frequency the point stayed a point and could been moved fast enough for simple forms.

Good to see this type of video. We want more people feeling confident about learning electronics. All fake projects do is discourage those trying to learn. Thanks. Greets from Florida, USA. Cheers

We need more people like you to keep the trend going on busting the liars and cheaters of the world out. Good job!

Thank you Scott for pointing out a fake UKpostsr who should in all sincerity be banned from creating any content after all. Cheers and keep up the good work!

My first thought when I saw the picture on Patreon was, are you making some kind of electric motor. I could not be more wrong. Great video thou, debunking stuff like a true David L. Jones (eevblog) debunk video. 😂

It's really shocking for me , as both the creators are one of my favourites but thanks scott for Revealing the truth for our good!

This really helps for small project makers who are new to the world of electronics. This kind of video will help them to understand the reality. I wish you upload more videos related to debunking 😊

This was the Video i was wating for a long time, Thanks alot for exposing the Truth. iam a small youtuber, and Our Great Scott is a Best Teacher 👍✌️

The body diodes of the MOSFETs would tend to absorb much of the inductive spike, but you're right, a parallel flyback diode is safer. You might get better performance by attaching a magnet to the diode, making an iron circuit between the coils so the laser diode lives in the gap, fine tuning the gap size, adjusting the compliance of the laser diode mount, etc., but the best you're going to get out of it is fairly low frequency Lissajous figures, nothing like a raster scan.

Also you need gate resistors. To save outputs of your Arduino.

I posted a comment on that scam video with a link to this debunking video. Added some of my observations as well. Hope what you did manage to at least prevent more people from getting scammed. Thank you for contributing to make youtube a better place!

That's why in commercial products they use mirrors to draw images with laser :D. Great work Scott!

To achieve the fidelity of the display in the original creator's project, a high-speed DAC would've been required to control the laser. And mechanical effects cannot be ignored when vibrating the diode at such high speeds. It could draw oscilloscope figures, but not much.

it would be dope if someone continues this project and adds the feedback system and makes a crude display out of it

Very nice breakdown on both the initial design and the concept itself. I've seen something adjacent to this, where instead of magnets affecting the diode, they actually use a mirror and a speaker to control the laser output shape with sound. Theoretically, that would be a much simpler way to get the same end result.

Another great video Scott. I appreciate the effort you went into in order to debunk another fake. It's startling how many people viewed that video and subscribe to that UKpostsr. Thank you for your efforts to set people straight.

Love your work! Keep it up!

Best electric engineer in UKposts i really learn a lot Frome u hope u all the best And I hope some day I became like great Scott 😁 Scott

Wow I remember when you had a handful of subscribers, 1.8m??? I’m so happy for you!! That’s incredible!! You deserve all the success!! I’ve learned sooo much from you

Kanti is blissfully unaware that he had been holding your beer while you made this video.

Thank you for debunking and debuggin and de.... building? :D

So basically this is the electronics version of those stupid "survival construction" videos where they pretend to build mansions using nothing but a stick.

Great video So time consuming to de-bunk other YT trends, with no connection to reality. Great job 👍 Thanks for sharing your experience with all of us 👍😀

The total lack of iron cores were an instant red flag.

Thanks for debunking this. Sometimes his project seem questionable. I sometimes stumbled on alot of not compaling codes. You should really make more of these were you debunk fake projects. Especially seemingly "real" unbelievable ones. Also, like all his video have unrealistic clickbait that I simply question the legitimacy of his videos with out going further. I am a small content creator, i know it's hard to attract people to your chanel, but at least do it without trapping people.

Love it! More of these videos if you can!

Great video! Can you make a follow-up on how its done on real laser projectors? Those micro mirror actuators are really intriguing :)

Im glad you didnt just say it doesnt work but also showed why. Big ups for also showing how to build a better one.

Cool Video! Please debunk more fake projects! :D

Ibsaw his videos as well I had a feeling a lot of his projects were not correct, thanks for actually trying to make them

I'm so glad you made this video about the fake information that channel uploads. This will help viewers identify legitimate content.

Loved the video👏but how do Varistors work? GreatScott

It's definitely better to build the dual mirror galvo setup. That's what is used in most commercial laser projections. This way with magnets like this, is never going to display with much accuracy. I have seen that video and I thought it looked fake so glad to see someone else prove it.

That’s a serious troll post whoever started this impossible project. Thanks for debunking it. That’s a Great video Scott!!!!

Very cool debunk! I would think developing a feedback system would be probably the hardest part of this. Just as a thought experiment, would you start by throwing a hall effect sensor on each of the electromagnets then trying to correlate those values to the laser displacement?

I have an idea from a video where fast rotating mirrors are used to capture fast moving objects in slow mo, such as ping pong balls and tank shels. You can have the laser fixed, and make 2 mirrors rotating in 2 different axis.

Mehdi is Batman, and Scott is Robin. The rectifier duo!

Always love how informative your videos are keep up the wonderful work

I really think that this type of videos become rather important for enthousiasts. (Probably depends on my and your algorithm), but the more I click on "do not recommend this channel", the more videos about free energy etc. Appear. Luckily, there is a frequent stream of GreatScott uploads. Thanks again for all the information.

Really appreciate your efforts. I have gone through his channel and most of projects are fake or poor working

I just went to check the original video... comments are off and the very first line of subtitles says "Special Thanks to GreatScott for promoting this video" xD

There is something oddly satisfying about seeing fake/scam content creators get called out.

Parabéns!! Muito bom o conteúdo de vocês. 👏🏽👏🏽👏🏽

Thank you for putting effort and identifying fake projects

Love how you can see in the fake video how there's flickering in the whole area where the figure is casted almost like it's taken from a darker background made transparent to look like it's on the paper, and repeatedly spread in intervals across the timeline to create the illusion of light delay

I tried remaking multiple projects on Robotics Kanti's channel, and I regretted it as none of them worked. This channel is full of fake projects and clickbait videos. But GreatScott's channel is great though, I like every project made on it and I'm watching it for years, and everything here is real and to be trusted. Thanks, Scott.

You should look into a control circuit for a old CRT TV or monitor. They worked on a very similar theory. They used class AB amplifiers with BJTs instead of mosfets to control a light beam created in a vacuum.

Nice Lenovo y510. Do you have the second Nvidia gt 750/755m GPU in the drive bay slot set for sli or just the single GPU?

Thanks for your diligent effort to push back against junk information/lies

I ran into the same issue when working on a client project. I ended up having to figure out how to actually make it work for my client's video. In the end, we got something that looked way cooler and actually worked.

That schematic really gave me some laughs. I noticed the n channels were being used to switch high side, but the fact that the body diodes were forward biased was even funnier.

Old TV Screens used a similar technology where they made the beam and then use magnetic fields to bend the beam until it hits the correct part of the screen. Which I find amazing.

This just reminds me of the amazing maker scam a few years back. A shame some people resorts to fake scams and not using their talents for something useful.

Great video Scott, Thanks for sharing.

Well you got close and really it all depends on the iron placement and if it was more pointed. Just a thought. Thanks for exposing the fake.

This should be a series on your channel called 'Electronics content cop' 😂

Robotics Kanti video: This video isn't available anymore

thank you, i was trying to make a laser turret to shoot down bugs. in addition to frame servos, i needed something additional for the laser head. This is exactly what im looking for

I love that you debunked a fake project, always nice to see! If you choose to go further into this/other laser projects I am down to help out!

Nice video! Are you using Onshape for CAD?

The first photo on the blog post you linked to reveals it's a fake. It's a red laser diode, yet the display shows red, black, and white. How did the red laser produce white output? Thanks for digging into it and sharing your findings! I have a new appreciation for how well mirrors on galvanometers work for directing laser beams.

When you said "NO! It doesn't", I felt you channel a little of your inner ElectroBoom lmao

That is the power of believing. And the funny thing is. When you ask people where they can get the necessary information to know better, they say "I don't know", having the internet in their pocket. But the will to acquire the knowledge is not there.

Great video i noticed i have the same msi laptop and onshape cad. The laser proyecting method seemed familiar to me because it reminded me of how crt monitors worked

One great way to spot fake designs (seen alot in homemade power generators) is the lack of magnetic circuits. If you see coils wounded on whatever form but with no iron core and even when a iron core is present it doesn't form a loop, that shit is fake or highly inefficient

This is the way that old tube TVs worked, I remember watching a documentary that explained how Atari game devs figured out how to program somewhat of decent graphics with that time technology, and one of their tricks was use timing of this "finger" to they're advantage in order to render elements on the screen

I've made a laser toy almost like that but it is also quite different, and soon to be impossible. I used mechanical hard drives, specifically the moving arm attached to the reading heads. It has a coil between two very strong magnets and deflects with modest current. I attached a small piece of 1st surface mirror to the arm at the pivot, and aimed a laser at it. Let's call this the left channel. I then took a second hard drive, same procedure (remove platters, attach 1st surface mirror to pivot) and arranged the hard drive cases at right angles, so I had x and y deflection, let's call this second hard drive the right channel. You can then attach the left and right voice coils, which are the coils of wire between the hard drive magnets, to a headphone jack, power a laser, and get an audio driven laser light show, classical music or pure tones create collapsing ellipsoids, fun to watch. Before then, back when you could get black and white (or black and green) CRTs, I took one apart and much like the above, attached the deflection coils to an audio output. This functioned like and oscilloscope, and again created collapsing ellipsoids when listening to classical music or pure tones. It would be fun to create a programmable laser display, and my dear Great Scott, just make one with some fast stepper motors, OK? Research laser display tables, and make a DIY or Buy episode, making our own must be far cheaper. Sure, lasers are dangerous, but so is electricity in general, both are fun if done responsibly. Cool video! Just remember kids: deflect the mirrors, not the laser, and you can make your laser arbitrarily big.

I love it when someone with the real brain power shoots down these hoaxes! Thanks for your efforts...

it is really an intriguing idea, going back to CRT TV working concept. maybe it will be cool to have a simple DIY laser projector. as always, thank you for your contents :)

What works fairly well - I knew people who hacked it up in the 1980s - is gluing a lightweight mirror to a speaker cone and actuating it with the voice coil. Arrange it so that one stereo channel drives X and the other Y, and use a soundcard to produce whatever pattern you want to show. (Well, not a soundcard in the 1980s, but nice Lissajous patterns from harmonically related oscillators.)

The trick with a laser display is to move a mirror and not the diode, there's a *tiny* little laser-resin printer out there that does this, and uses an actual sound wave from PC speakers to move said tiny mirror. forget who makes it, but that is one useful application of such a device.

"way to much effort for something that isn't really usefull " - recalling the Transformer Speaker video from the past xD