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

350mW 660nm laser not burning

Z

z4ibas

0
Joined
Mar 14, 2012
Messages
36
Points
0
Hello,

I received my red laser diode 660nm 300-350mw CW Re Laser Diode DIY/Lab//TO18 5.6mm | eBay and module host Focusable Laser Module Host/5.6mm Laser Diode Case w/h Lens/DIY Laser Host/1pcs | eBay . I use this LM317 driver http://laserpointerforums.com/f42/diy-homemade-laser-diode-driver-26339.html with 1s LiPO=4,2V. Driver's pot is at 0 Ohms, resistor is 4,4 Ohms so the current is ~284mA. I assembled all parts, focused laser into small dot, but it doesn't light up a match. Even LD heatsink doesn't heat. What is the problem? Now I can't change the resistors, to regulate the current.

P.S. Seller said, that this diode working current is <400mA.
 
Last edited:





marianin

marianin

0
Joined
Mar 29, 2012
Messages
173
Points
0
4,2v??? that is not enough for a lm317 driver you need at least 6v because the lm137 nedds 3v to work, try with 2 x lithium cells (7.4v)


z4ibas said:
Hello,

I received my red laser diode 660nm 300-350mw CW Re Laser Diode DIY/Lab//TO18 5.6mm | eBay and module host Focusable Laser Module Host/5.6mm Laser Diode Case w/h Lens/DIY Laser Host/1pcs | eBay . I use this LM317 driver http://laserpointerforums.com/f42/diy-homemade-laser-diode-driver-26339.html with 1s LiPO=4,2V. Driver's pot is at 0 Ohms, resistor is 4,4 Ohms so the current is ~284mA. I assembled all parts, focused laser into small dot, but it doesn't light up a match. Even LD heatsink doesn't heat. What is the problem? Now I can't change the resistors, to regulate the current.

P.S. Seller said, that this diode working current is <400mA.
Click to expand...
 
Last edited:
Z

z4ibas

0
Joined
Mar 14, 2012
Messages
36
Points
0
Omg, I the current was safe, I added exactly 6V, LD shined brightly, but after few secs till focused the lens, laser died. LOL. 5th laser diode...

P.S. heatsink was hot.
 
Last edited:
marianin

marianin

0
Joined
Mar 29, 2012
Messages
173
Points
0
man i suggest you that build a test load and buy a driver no make experiments with lm317 drivers (if you want a real lasers burner)

P.S. i kill 4 red laser diodes :)

z4ibas said:
Omg, I the current was safe, I added exactly 6V, LD shined brightly, but after few secs till focused the lens, laser died. LOL. 5th laser diode...
Click to expand...
 
Last edited:
marianin

marianin

0
Joined
Mar 29, 2012
Messages
173
Points
0
mmmmm what about a ghostdrive??? is a great driver for red laser diodes

P.S. is a linear driver you need 2x lithium cells

z4ibas said:
So what driver is the best? I tested the current, it was 250mA.
Click to expand...
 
Z

z4ibas

0
Joined
Mar 14, 2012
Messages
36
Points
0
I want to make a driver my self, because I have no money for buying them.
 
Z

z4ibas

0
Joined
Mar 14, 2012
Messages
36
Points
0
I want to build driver myself, not to buy. How to know, which dvd-rw has 5.6mm round laser diode, not square?
 
marianin

marianin

0
Joined
Mar 29, 2012
Messages
173
Points
0
the newer models of dvd burners have this diodes, i open a lot of old dvd burners and almost 20% have a to-18 5.6mm driver

z4ibas said:
I want to build driver myself, not to buy. How to know, which dvd-rw has 5.6mm round laser diode, not square?
Click to expand...
 
Z

z4ibas

0
Joined
Mar 14, 2012
Messages
36
Points
0
Now I want to buy LPC-826 diode, it is very powerful and cheap. Can I use LM317 driver? I need a big heatsink, right? If I put LD into housing, and that housing into heatsink, it will be OK?
 
marianin

marianin

0
Joined
Mar 29, 2012
Messages
173
Points
0
yes it will be ok but you need to check your driver before you put yor LD and if you use a capacitor short their pins before conect the LD?

P.S: i suggest you that buy a driver

z4ibas said:
Now I want to buy LPC-826 diode, it is very powerful and cheap. Can I use LM317 driver? I need a big heatsink, right? If I put LD into housing, and that housing into heatsink, it will be OK?
Click to expand...
 
You must log in or register to reply here.





Top