Exposing the FAKEST Project. and making it REAL!
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Date: 2023-04-23
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Comments and reviews: 15
Carborane81
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.
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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.
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Mike
I'd just say that to get the sort of precision positioning required, you'd have to deal with the inductive nature of the coils. The magnetic force is related to the current and trying to start/stop current that quickly, IMHO, would require more sophisticated power control. Just shutting it off and letting the current decay through a flyback diode doesn't seem enough.
Old-fashioned CRT TV's got away with magnetic drivers because they ran a simply ramping 'scan' that didn't have to change direction constantly while 'steering' the beam.
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I'd just say that to get the sort of precision positioning required, you'd have to deal with the inductive nature of the coils. The magnetic force is related to the current and trying to start/stop current that quickly, IMHO, would require more sophisticated power control. Just shutting it off and letting the current decay through a flyback diode doesn't seem enough.
Old-fashioned CRT TV's got away with magnetic drivers because they ran a simply ramping 'scan' that didn't have to change direction constantly while 'steering' the beam.
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Paul
Cool project! Now record the image produced and use machine learning to train the magnets to give the proper shape. No need for engineering perfect magnets, just use better control software. Probably a worthwhile engineering improvement would be to get rid of the wire that is acting like a spring and causing a lot of complications with the movement. Extend the rear of the diode and attach magnets to that, and fix it through some sort of gimbal, so that you get an amplification of the movement of the diode. Looking forward to part 2!
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Cool project! Now record the image produced and use machine learning to train the magnets to give the proper shape. No need for engineering perfect magnets, just use better control software. Probably a worthwhile engineering improvement would be to get rid of the wire that is acting like a spring and causing a lot of complications with the movement. Extend the rear of the diode and attach magnets to that, and fix it through some sort of gimbal, so that you get an amplification of the movement of the diode. Looking forward to part 2!
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Photonik
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.
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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.
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John
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.
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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.
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Mr.
So many fake kits on Ebay. A laser wireless speaker system has no way to vary the laser output for the light sensor to interpret. So I built a wireless speaker system with FM receivers on each speaker with a FM transmitter output on a laptop. Another with child toy walkie talkies. Neither sounded very good but functioned better than any fakes on Ebay.
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So many fake kits on Ebay. A laser wireless speaker system has no way to vary the laser output for the light sensor to interpret. So I built a wireless speaker system with FM receivers on each speaker with a FM transmitter output on a laptop. Another with child toy walkie talkies. Neither sounded very good but functioned better than any fakes on Ebay.
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Peter
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.
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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.
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jorgemt62
Entropy is definitive. No escape. It builds up and sooner or later the system breaks down. Short minded people confuse eternity with I won't live to see it. I stopped trying to explain, as I did with flatearthers, chemtrailers, 5g-ers, antivaccines, vegans, etc, etc, etc.
Still, it's fun to watch others doing it.
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Entropy is definitive. No escape. It builds up and sooner or later the system breaks down. Short minded people confuse eternity with I won't live to see it. I stopped trying to explain, as I did with flatearthers, chemtrailers, 5g-ers, antivaccines, vegans, etc, etc, etc.
Still, it's fun to watch others doing it.
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john
Sad to see electronics projects down the same fake-recipe, fake-crafts rabbit-hole.
There are companies churning out fake projects by the thousands, just for clicks.
It would be a lot easier to use a mirror, controlled by servos, to deflect the beam, if you wanted to make a display like he described.
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Sad to see electronics projects down the same fake-recipe, fake-crafts rabbit-hole.
There are companies churning out fake projects by the thousands, just for clicks.
It would be a lot easier to use a mirror, controlled by servos, to deflect the beam, if you wanted to make a display like he described.
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Diego
The core of the coils would have to be made of a fast-response magnetic material. And the laser support could be implemented with a spring more flexible than the wire. To create a finer movement would require a greater number of coils. Undoubtedly a very expensive and difficult project to execute.
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The core of the coils would have to be made of a fast-response magnetic material. And the laser support could be implemented with a spring more flexible than the wire. To create a finer movement would require a greater number of coils. Undoubtedly a very expensive and difficult project to execute.
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ProPhoenix
Mom I want a CRT monitor
We have CRT monitor at home
CRT Monitor at home; -;
CRT used electron beam that was moved to place with electromagnets to draw picture line by line
Simple and creative solution to drive and image
I believe that was an inspiration for this project
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Mom I want a CRT monitor
We have CRT monitor at home
CRT Monitor at home; -;
CRT used electron beam that was moved to place with electromagnets to draw picture line by line
Simple and creative solution to drive and image
I believe that was an inspiration for this project
reply
rogwabbit
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.
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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.
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viermidebutura
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
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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
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protonjinx
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.
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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.
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Game
I also saw the video being Indian i also felt bad that for views and money people makes fake projects and pretend like it works and by links people buy wrong components. Thanks for debugging that video. We hope we will see such videos in future related to fake projects and debug them
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I also saw the video being Indian i also felt bad that for views and money people makes fake projects and pretend like it works and by links people buy wrong components. Thanks for debugging that video. We hope we will see such videos in future related to fake projects and debug them
reply
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