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Voltage drop of SLD3236VF 405nm laser diode

chris47368

New member
Joined
Feb 2, 2020
Messages
2
Points
1
I originally posted this on Reddit and someone told me to repost on here:

Hi everyone,

I am on my first custom built laser project and am really struggling to determine the voltage drop of this diode so i can create the correct dummy load to adjust the driver to a safe current output without risking my actual diode.

I have a current dummy setup consisting of a 1ohm resistor and 4x 1N4001 diodes connected in series together but im not sure how accurately that will "simulate" the laser diode i have given the little and mixed information i see online.

Here is the data sheet on this laser diode i have(remove square brackets from url):
https[://]datasheetspdf.com/datasheet/SLD3236VF[.html]

Thanks everyone!
 



paul1598419

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Sep 20, 2013
Messages
18,419
Points
113
The 5 volts is the forward operating voltage of this diode at 140 mA. If you drive it harder it will increase. It could get up to 6 volts at a high enough drive current.
 

Philipnzw

Active member
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May 19, 2019
Messages
122
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43
Make sure to not over current this little diode, i've killed one before by driving it way beyond 140mA. It seems like this diode just can't handle higher currents.
However its a relatively cheap diode and it's good for practice.
 

paul1598419

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Sep 20, 2013
Messages
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All the 405nm diodes are temperamental. They all tend to fail early at some over driven drive current, but knowing the safe limit only comes with trial and error and many failures. Good luck.
 

Lifetime17

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Joined
Dec 15, 2014
Messages
6,458
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I originally posted this on Reddit and someone told me to repost on here:

Hi everyone,

I am on my first custom built laser project and am really struggling to determine the voltage drop of this diode so i can create the correct dummy load to adjust the driver to a safe current output without risking my actual diode.

I have a current dummy setup consisting of a 1ohm resistor and 4x 1N4001 diodes connected in series together but im not sure how accurately that will "simulate" the laser diode i have given the little and mixed information i see online.

Here is the data sheet on this laser diode i have(remove square brackets from url):
https[://]datasheetspdf.com/datasheet/SLD3236VF[.html]

Thanks everyone!

Hi
Did you post in the welcome section first? No I see and intro about your self would be in order here at LPF . Where your from your interests in lasers and so on.
Rich:)
 

RedCowboy

Well-known member
Joined
Jul 10, 2015
Messages
10,357
Points
113
I originally posted this on Reddit and someone told me to repost on here:

Hi everyone,

I am on my first custom built laser project and am really struggling to determine the voltage drop of this diode so i can create the correct dummy load to adjust the driver to a safe current output without risking my actual diode.

I have a current dummy setup consisting of a 1ohm resistor and 4x 1N4001 diodes connected in series together but im not sure how accurately that will "simulate" the laser diode i have given the little and mixed information i see online.

Here is the data sheet on this laser diode i have(remove square brackets from url):
https[://]datasheetspdf.com/datasheet/SLD3236VF[.html]

Thanks everyone!

https://www.survivallaserusa.com/3A_Selectable_Test_Load/p1667092_11195751.aspx

Instructions from page.
 

hakzaw1

Well-known member
Joined
Apr 2, 2009
Messages
10,627
Points
113
Hi
Did you post in the welcome section first? No I see and intro about your self would be in order here at LPF . Where your from your interests in lasers and so on.
Rich:)
==
I agree 100%
its not a rule... just like we are not bound to help you...so don't be a party crasher and intro yourself w/ location in the intro title as well as in your profile... we are having a big party soon and want to invite you so.....
hak in south Texas on the San Benard river... so drop in any time (if you can swim..lolol)
 

wolfram

Active member
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Sep 13, 2008
Messages
270
Points
28
Hak , you are a wild one aint ya. But, I do have to say that you are great addition to the forum!
 




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