Old 05-15-2018, 01:50 PM #1
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Post Mr Steak's laser rifle

Short introduction, Im a student in electronics and got quite some experiance in developing embedded systems and making mechanical drawings for CNC and 3D printing purposes. Im looking mostly for information and doing research for the next month, so i can get started on this project in the summer.

Here is my idea:
I was thinking of using 2 lasers. One to give a somewhat bigger visual dot, and the other one with some more focus for melting/ingraving. Those two would then be combined with some sort of optics so they overlap. Looking for preferably blue or purple beams with power between 1W-7W.

The lasers would be fired for about half a second. Should be enough time to get a good view of light on the target you hit, and for the focused laser to leave a small mark. (not sure about this yet, but its just to give you an idea what it would be used for).

The entire thing would be controlled by a microcontroller on a pcb that will read the input of an electronic trigger, control a bunch of leds that will make it look better. Im also thinking of adding 2x blue-7 seg displays where i could represent the charge left in the battery (form 0-99) if i can find a way to make that happend.

the gun itself would be used as a heatsink. I believe that should not be an issue to still hold it without getting burned as the surface area is quite big to disperse the heat. Roughly 60% of the gun would be aluminium, 30%
acrylic glass and the remaining parts will be of black plastic for the handheld parts. The total lenght i estimate to be 60cm.

I'd love to make my own driver for this, but it doesnt seem to be easy to find High powered lasers that come without those. Anyone who can point me in this right direction for driver guidelines and laser diodes without driver would be a great help.

So any input on what laser, optics, batterys or power supply to use is greatly appreciated.

Here are the parts i tought might be interesting for this project.
NUBM44 ( https://www.ebay.com/itm//171841770497 )

And if I end up not making a driver myself:
BlackBuck 8M - 8A Buck Laser Driver ( https://www.ebay.com/itm/182404712160 )

If you suggest new parts, keep in mind that the buget for this thing is around 500 euro (about 600 dollar). for the laser, optics and driver combined.

Ill be around to post progress when i get started when i've gathered enough information.


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Old 05-15-2018, 04:38 PM #2
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Default Re: Mr Steak's laser rifle

Suggest you get some experience with lasers that output more than 1mW to 5mW which you indicated is the only the experience you have with lasers in your Welcome post and what they are and are not before you get involved in building a complicated + dangerous for many reasons, physical and legal, toy rifle.

Make sure you understand Belgium's laser laws and blinding weapons laws (Belgium’s Law Regulating Economic and Individual Activities with Weapons (2006) ) unless you intend to use it alone and indoors where nobody will see it.

Maybe get a high output hand held from either:
https://www.jetlasers.org/ or
https://www.sanwulasers.org/

Last edited by Encap; 05-15-2018 at 05:59 PM.
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Old 05-15-2018, 04:48 PM #3
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Default Re: Mr Steak's laser rifle

Quote:
Originally Posted by Encap View Post
Suggest you get some experience with lasers that output more than 1mW to 5mW which you indicated it all the experience you have in your Welcome post and what they are and are not before you get involved in building a complicated + dangerous for many reasons, physical and legal, toy rifle.

Make sure you understand Belgium's laser laws and blinding weapons laws (Belgiumís Law Regulating Economic and Individual Activities with Weapons (2006) ) unless you intend to use it alone and indoors where nobody will see it.

Maybe get a high output hand held from either:
https://www.jetlasers.org/ or
https://www.sanwulasers.org/
What he said, mostly.

Do you have any experience with high power lasers? If not, I'd get some with something <100mW before jumping into something that's 1W-7W
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Old 05-15-2018, 05:43 PM #4
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Default Re: Mr Steak's laser rifle

Quote:
Originally Posted by Encap View Post
Suggest you get some experience with lasers that output more than 1mW to 5mW which you indicated is all/the only the experience you have in your Welcome post and what they are and are not before you get involved in building a complicated + dangerous for many reasons, physical and legal, toy rifle.

Make sure you understand Belgium's laser laws and blinding weapons laws (Belgiumís Law Regulating Economic and Individual Activities with Weapons (2006) ) unless you intend to use it alone and indoors where nobody will see it.

Maybe get a high output hand held from either:
https://www.jetlasers.org/ or
https://www.sanwulasers.org/
That is interesting. I did do a search regarding laser regulation but not a lot turned up. Ill read that trough. development would be garage only (got a pretty long one) so i dont see that being an issue. What is possible as to the experiance and probably safer aproach, would work with a 100-200mW laser for the visual dot and keep the actual burning aspect on the shelf until thats done.
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Old 05-15-2018, 05:58 PM #5
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Default Re: Mr Steak's laser rifle

You're jumping right into the deep end of the pool without swimming experience. I suggest a proof of concept first using low power class 3A lasers.

Last edited by steve001; 05-15-2018 at 07:33 PM.
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Old 05-15-2018, 06:52 PM #6
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Default Re: Mr Steak's laser rifle

Why in the world would you want to use the most powerful visible diode available to us which, by the way, has the worst divergence specs as well to do an experiment that would likely work better using a 2 watt 445nm laser with better divergence specs? Is it because it is the most powerful that got your "wow" factor engaged in doing this with the NUBM44 diode? I think this project is doomed to fail as you have not done the requisite research to set this up properly.
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Old 05-15-2018, 08:27 PM #7
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Default Re: Mr Steak's laser rifle

Quote:
Originally Posted by paul1598419 View Post
Why in the world would you want to use the most powerful visible diode available to us which, by the way, has the worst divergence specs as well to do and experiment that would likely work better using a 2 watt 445nm laser with better divergence specs? Is it because it is the most powerful that got your "wow" factor engaged in doing this with the NUBM44 diode? I think this project is doomed to fail as you have not done the requisite research to set this up properly.
Agree. Seems to be another laser project like many we have seen here based on misconceptions about and daydreams of laser "power" and "burning" stuff with a laser but with the twist of make it look like a rifle for whatever reasons in this case.

steaksoep: You need to get some experience not only with handling higher output power lasers but also with building/assembling a laser. Would suggest you buy the parts and assemble a 1 to 2W 445nm blue hand held before you go further or just buy one already complete.
PS You don't "fire" a laser of the type being considered you simple turn it on an off.

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Old 05-15-2018, 08:37 PM #8
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Default Re: Mr Steak's laser rifle

What was said. Start small and educate yourself. Safety is crucial for such a project. Trust those working with high powered lasers daily.
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