Project 450 - 7W Blue Laser Constant-Current Buck Driver

[clientequator]

@BlueSwordM

Wait, you are going to build a driver for a 7W laser.

If it’s around 20% efficient, then you’ll need to provide 35W of power.

That’s on the level of an XHP70.2 with the die size of an 1mm2 White LED.

loneoceans say for 7w light output he driving with about 21w power in! it seem like this driver can do 50w power, so this is why i suggest to make a very powerful buck driver for flashlight using same design!

[contactcr]

Flashlight driver doesn’t sit on a thick piece of copper though and it wont fit on 17mm. I’m sure there is some that can be adapted to flashlights though

[hank]

I wish it were harder to imagine this kind of high powered blue or violet laser getting into the hands of a nutcase.

[Agro]

@djozz

(…)there is simply no other use for me than playing and that is exactly what is a bad idea with powerful lasers.

Exactly my thoughts.

[Lightbringer]

@hank

I wish it were harder to imagine this kind of high powered blue or violet laser getting into the hands of a nutcase.

Could just as easily be used to disable a nutcase, though. And from a nice safe distance.

[MascaratumB]

@Lightbringer

@hank

I wish it were harder to imagine this kind of high powered blue or violet laser getting into the hands of a nutcase.

Could just as easily be used to disable a nutcase, though. And from a nice safe distance.

:smiling_imp: “Ballz-eye!”

[teacher]

@Lightbringer

@hank

I wish it were harder to imagine this kind of high powered blue or violet laser getting into the hands of a nutcase.

Could just as easily be used to disable a nutcase, though. And from a nice safe distance.

+1 … :+1:

The only defense against a bad guy/nutcase with a high powered blue or violet laser is a good guy with a high powered blue or violet laser.

Hopefully the ‘good guy’ will have proper eye protection and the ‘bad guy’ will not.

If the bad guy does have eye protection, go immediately to Plan B……
………… the Pb & Cu solution.

[Lightbringer]

I was thinking about situations like the nutjob in Nebada Las Begas during that concert that used the dreaded bump-stock to do his nasties. Okay, so everyone’s pinned down, you can’t shoot back even if you were packing (at risk of peppering a bunch of innocently-occupied rooms in the process), but one good look at where the bozo’s shooting from, whip out Ol’ Blue, and give him a few multi-watt flashes to sear his retinas, and he won’t be shooting anyone except purely at random. And then won’t be able to escape without feeling his way out with a white cane.

[teacher]

@Lightbringer

I was thinking about situations like the nutjob in Nebada Las Begas during that concert that used the dreaded bump-stock to do his nasties.

Yeah… that was bad. Amazing it disappeared from the news so fast too.

“The dreaded bump-stock”…. I’ll have to assume that is sarcasm.
A bump-stock is good for nothing but to play with for the most part. If your trying to really hit anything specific after the second shot…. good luck unless you are highly trained & lucky. It’s more of a ‘pray & spray’ device.

Heck, you can do the same thing with a rubber band or a belt if you know what you are doing.

@Lightbringer

Okay, so everyone’s pinned down, you can’t shoot back even if you were packing (at risk of peppering a bunch of innocently-occupied rooms in the process), but one good look at where the bozo’s shooting from, whip out Ol’ Blue, and give him a few multi-watt flashes to sear his retinas, and he won’t be shooting anyone except purely at random. And then won’t be able to escape without feeling his way out with a white cane.

That could possibly work well…. :+1:
But, on the other hand, if you have located where the “bozo” is; Pb & Cu could work well also.

Hope we never have to find out about either….

[Lightbringer]

@Lightbringer

…(at risk of peppering a bunch of innocently-occupied rooms in the process)…

Just to repeat, then I’m out (don’t want it to get too “political”).

[teacher]

@Lightbringer

@Lightbringer

…(at risk of peppering a bunch of innocently-occupied rooms in the process)…

Just to repeat, then I’m out (don’t want it to get too “political”).

Political? Ok? :person_facepalming:

Just like if you use said laser… you hit your target or blind a bunch of innocent people…. right??

The same thing applies to Pb & Cu…. hit your target, whatever it may be.

With either one, you do not do it unless you know you can hit what your aiming at.

I’ll be out to I guess…
…………would not want to offend or tip off any potential bad guys.

[TrueRMS]

@teacher

:

Just like if you use said laser… you hit your target or blind a bunch of innocent people…. right??

Questions (not being sarcastic and also not suggesting it’s a good idea either):
Would the buildings glass not stop said laser from hurting people behind it (so only the shot out window rooms occupants were at risk)?

Would the buildings glass reflect the laser and have it still be powerful enough to do damage to people still on the ground?

[contactcr]

Class 3B
LASER RADIATION
AVOID EXPOSURE TO BEAM
CLASS 3B LASER PRODUCT

A Class 3B laser is hazardous if the eye is exposed directly, but diffuse reflections such as those from paper or other matte surfaces are not harmful. The AEL for continuous lasers in the wavelength range from 315 nm to far infrared is 0.5 W. For pulsed lasers between 400 and 700 nm, the limit is 30 mJ. Other limits apply to other wavelengths and to ultrashort pulsed lasers. Protective eyewear is typically required where direct viewing of a class 3B laser beam may occur. Class-3B lasers must be equipped with a key switch and a safety interlock. Class 3B lasers are used inside CD and DVD writers, although the writer unit itself is class 1 because the laser light cannot leave the unit.

Class 4
LASER RADIATION
AVOID EYE OR SKIN EXPOSURE TO
DIRECT OR SCATTERED RADIATION
CLASS 4 LASER PRODUCT

Class 4 is the highest and most dangerous class of laser, including all lasers that exceed the Class 3B AEL. By definition, a class 4 laser can burn the skin, or cause devastating and permanent eye damage as a result of direct, diffuse or indirect beam viewing. These lasers may ignite combustible materials, and thus may represent a fire risk. These hazards may also apply to indirect or non-specular reflections of the beam, even from apparently matte surfaces – meaning that great care must be taken to control the beam path. Class 4 lasers must be equipped with a key switch and a safety interlock. Most industrial, scientific, military, and medical lasers are in this category. Medical lasers can have divergent emissions and require awareness of nominal ocular hazard distance (NOHD) and nominal ocular hazard area (NOHA).[20]

Pretty sure the power and wavelength would put this far into Class 4, meaning it can mess your day up with even a diffuse reflection

[Nev]

Makes me laugh that they’ve made it illegal to use & export above 5mw lasers but you can have as many guns as you like.

[contactcr]

@Nev

Makes me laugh that they’ve made it illegal to use & export above 5mw lasers but you can have as many guns as you like.

Obvious troll since UK has some of the most strict gun laws

[Nev]

I was talking about USA
I have a 50mw ,37mw & 17mw lasers , they had to be sent on the QT.

[contactcr]

@Nev

I was talking about USA

I know, mind your own business

[Nev]

@contactcr

@Nev

I was talking about USA

I know, mind your own business

I will if you will , posted with love , I seem to have acquired my stalker Troll back

[djozz]

Discussions about gun control derail in seconds, better not to go into that.

[Lightbringer]

@teacher

Political? Ok? :person_facepalming:

Hey, you’ve been around, and you’ve seen how quickly these threads devolve. :confounded:

And all too often it happens overnight and I miss all the juicy bits. :laughing: