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445nm Brick!

HIMNL9

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No, if you want to use it as CURRENT regulator, the trimmer must NOT be connected to GND ..... if you do that, it turn in a VOLTAGE regulator .....
 



CrazyMonkey

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No, if you want to use it as CURRENT regulator, the trimmer must NOT be connected to GND ..... if you do that, it turn in a VOLTAGE regulator .....
Yes. I am not sure what I meant now. I guess I meant that's what was missing from being a voltage regulator. I am not sure what his diagram will do though. I think it would just drop a certain voltage and do no regulation, as there is no feedback mechanism.
 

Things

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It can't be working as a voltage regulator, or my diode would have surely blown up at 10V input!

Voltage regulator circuitry for the LM317 is a resistor voltage divider IIRC.
 

Tech_Junkie

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Still amazes me after all this time playing with lasers, that lighting a match is still entertaining.

How about hanging a sneaker from a tree by the laces, and cutting the lace from 10 feet? If nothing else, light a match from 50 feet. Anyone can light a match inches from a 100mW+ laser.
 

Things

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Nah, I just like fire :evil:

I don't find it particularly interesting myself, but everyone does it so I guess it's required in all laser video's :D

Besides, I followed it up with lighting the wooden side on fire :D
 

laser_freak

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It's impossible to light a match > 10 feet away with the 445nm diodes because of their fast axis.
 

Tech_Junkie

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There is gotta be something original people can come up with other than matches, black tape and CD cases.

You just crushed my dream of cutting down the sneakers that are hanging on a power line next to my house.
 

wicked1

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There is gotta be something original people can come up with other than matches, black tape and CD cases.
I started to catch the cabinet on the other side of the room on fire. It's white pine, so I thought it was light enough to be safe.. Nope..
 

TheTeslaWarrior

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It's impossible to light a match > 10 feet away with the 445nm diodes because of their fast axis.
thats odd because i lit a match at 23ft with mine... took a couple minutes though
ima do it again and get a vid
 
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laser_freak

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thats odd because i lit a match at 23ft with mine... took a couple minutes though
ima do it again and get a vid
I just made up the 10 foot number, but still you get my point that until we are able to correct the beam, doing long distance match lighting will be hard.
 

TheTeslaWarrior

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yea it defiantly is not easy ill give you that, i'm gonna try and get some prisms from a friend.
Edit: id say the ~15 foot mark would be the start of difficulty
 
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Tech_Junkie

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An idea would be to make a mouse trap contraption, and use the laser to burn through a string or something to set it off.

I'm mostly still packed from my move, so any contributing from me is going to have to wait. But, if all goes right, I should have 1.8W 445nm brass laser gun, with an exposed HeNe tube sighting laser, and IR scope. Still have a ways to go though.
 

laser_freak

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i have never heard of an anamorphic lenses are they similar to FACs?
They are a pair of cylindrical lenses perpendicular to each other. The one closer to the diode to collimate the fast axis, and the other to collimate the slow axis.

Edit, sorry for the threadjack.
 




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