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



Laser Pointer Store

How laser diode drivers work; An Explanatory Thread

benmwv

New member
Joined
Sep 10, 2010
Messages
1,390
Likes
93
Points
0
I have an lt3083 board designed, and i have blank pcbs for it in a box somewhere. I never got around to testing it because they are big, inefficient, and expensive. They have a cool adjustment mechanism, but they aren't really good for a laser driver unless you are planning a labby.

If you are interested in the lt3083 I could try to find the pcbs and mail you one, or at least email you the design so you can get pcbs made.
 

tony1

New member
Joined
Jan 4, 2012
Messages
54
Likes
0
Points
0
rhd,
you have a good point there, I think it needs further discussion and verified .
 

Pman

Well-known member
Joined
Nov 28, 2012
Messages
4,444
Likes
938
Points
113
Realize this is old but nice write-up. I'm in Rochester, N.Y. by the way;)

Pete
 

DalDames

New member
Joined
May 18, 2016
Messages
1
Likes
0
Points
0
Hi everyone..i am new here. As per my knowledge LM317 driver, the voltage just follows the IV curve of the diode, and will end up being whatever that particular diode drops at the current you've set it to. So if you set your current on a test load with the wrong voltage drop, it shouldn't matter.However, one scenario in which it WOULD change, would be if your driver didn't actually have enough input voltage to handle the laser diode's Vf + its own dropout, but DID have enough input voltage to handle the test load's drop + its own dropout. In this scenario, you'd find that the actual current once connected to a real laser diode, would be lower.

pcb assembly services
 
Last edited:




Top