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



Laser Pointer Store

why use a driver?

Joined
Aug 30, 2008
Messages
6,927
Likes
412
Points
0
i was watching a video......and this guy just used a pot to control the voltage to the laser, why can i jsut do this instead of buying a driver, won't i get the same effect?
 

Joined
Jul 24, 2008
Messages
1,415
Likes
0
Points
0
no absolutely not.

you need somethin to regulate voltage spikes that you get in normal batteries
 

billg519

New member
Joined
Feb 21, 2008
Messages
1,056
Likes
84
Points
0
A current regulator, or driver, is required to ensure maximum power and good lifespan of the diode. As mentioned, batteries can have spikes and surges. The diode itself will undergo changes in its operating characteristics as it warms up. Anything that causes the diode to draw too much current will cause COD (catastrophic optical damage) to the diode, leaving you with an expensive LED. Hence the need for current regulation. Research the LM317 driver on this site (DDL or daedal driver) or buy a drlava or rckstar driver from this forum. Save your poor innocent diodes life, use a current regulator.
 
Joined
Aug 30, 2008
Messages
6,927
Likes
412
Points
0
but doesn't the pot regulate the voltage?

i already have rckstr driver, i was just curious about this......
 
Joined
Aug 25, 2007
Messages
2,045
Likes
121
Points
0
The pot doesn't REGULATE voltage, it basically just comes down to V=IR. With a steady state situation, or something not subject to transients in voltage or current like a lightbulb or good LEDs, then you can get away with not having a driver. But batteries are not steady-state, they have transients. And, laser diodes are EXTREMELY sensitive to transients and other such things. So a laser diode needs a driver to be safe.
 




Top