Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

LPF Donation via Stripe | LPF Donation - Other Methods

Links below open in new window

ArcticMyst Security by Avery

Daedal's new BluRay LASER

flogged

flogged

0
Joined
Jul 8, 2007
Messages
530
Points
0
I'm jealous. I really want a violet laser.

Can you see speckle around the dot? For example if you project the spot into a corner of the room (ceiling) can see speckle around it like with a green or red laser?
 





F

Frosty

0
Joined
Aug 7, 2007
Messages
79
Points
0
Very cool! So do you get broken Blue ray players and such to do this? I've got an old CD-r machine I might have to gut now, lol.
 
andy_con

andy_con

0
Joined
May 24, 2007
Messages
3,394
Points
0
no just buy a ps3 laser unit from ebay. i am selling my 405nm unit on my site if anyone is interested
 
F

Frosty

0
Joined
Aug 7, 2007
Messages
79
Points
0
Ahh cool, I was kinda horrified for a second thinking of someone buying a beautiful ps3 and then taking its laser, lol.
 
D

Daedal

0
Joined
May 23, 2007
Messages
2,277
Points
0
flogged said:
I'm jealous. I really want a violet laser.

Can you see speckle around the dot? For example if you project the spot into a corner of the room (ceiling) can see speckle around it like with a green or red laser?
Click to expand...

I can easily see reflections on all corners in a lit room, and at night, because my walls are white, it really seems like I'm holding a blue laser! :D

--DDL
 
E

Evilution

0
Joined
Aug 17, 2007
Messages
11
Points
0
Looking good.
I think 3x AA batteries (not rechargable) would be better and would certainly last longer.
Not a great deal bigger in size but again lend themselves to a tube design.

I'll get the red one made up and out the way and think about a blue.
 
T

Things

0
Joined
May 1, 2007
Messages
7,517
Points
0
Evilution said:
Looking good.
I think 3x AA batteries (not rechargable) would be better and would certainly last longer.
Click to expand...
yes i reckon they would last longer too! 9V batteries suck when it comes to output current and long life, a 9V battery can only supply something like 1 amp into a short, then it is dead! great work daedal! i'd certainly like a violet-ray laser!
 
L

LarryQ

0
Joined
Aug 13, 2007
Messages
726
Points
0
I don't think only 4.5 V from 3 AA (AAA) will work not enough voltage after the circuit to get the diode to pass the lase threshold.

Also, I was wondering, It looks like the only thing supplying resistance feedback to the ADJ leg of the LM317 is that 100 Ohm Pot.

If I wanted to put a static resistor in there in series with the POT to prevent the resistance from going too low and blowing the diode, what value would work to protect the diode??

Larry
 
S

ShinyThings

0
Joined
Sep 14, 2007
Messages
9
Points
0
Man, I've only been a member here for a few days, but I am constantly amazed by the things you guys are doing. Hell of a job, Daedal! I'm waiting for Senkat's GB to go through to get my red diodes then after getting both of those right, I'm going to try a violet.
Question though. Could you push this a little harder if you incorporated a 555 timer circuit?
 
T

Things

0
Joined
May 1, 2007
Messages
7,517
Points
0
you prolly could, but it becomes more of a hassle, and most of us are just wanting to get the laser going! even 5mw of UV is amazingly fun!
 
S

ShinyThings

0
Joined
Sep 14, 2007
Messages
9
Points
0
I bet ;)
I'm suprised that I haven't seen any mention of incorporating the 555 timer IC in the drivers I've seen here :-? SenKat's GB diodes are really only running at 80mW constant. The 555 will give you a 1ms 50% duty cycle if set up right in astable mode. I mean, it's not close to the 40ns that the spec sheet shows, but I think that it would dissapate enough heat to get it going at at least 125 mW without killing the life expectancy.
 
Hemlock_Mike

Hemlock_Mike

0
Joined
Jan 7, 2007
Messages
6,309
Points
83
80 mW CW max from a GB diode ????  I just posted AGAIN today about getting a little more than that
from a SenKat diode.  
Hey if you are happy with 80 mW -- everyone is happy  :D

Mike
 
T

Things

0
Joined
May 1, 2007
Messages
7,517
Points
0
shinythings--
people have managed to get more than 80mw from senkat diodes, have a look at some of kenoms threads, he has got like 170mw out of the diode CW!
 
You must log in or register to reply here.




Top