Old 10-17-2013, 02:27 AM #1
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Default Powerful M140 laser build plan predicament.

Okay so I have narrowed my DIY project down and I'm only left with a few discrepancies. I want to make a laser with a 445nm M140 diode.

As for the driver...
I saw that the LM317 Constant Current Driver was good for outputs up to 1.5A. This diode requires an amperage of 1.2A-1.8A, so the LM317 will be no good for this diode (I know you can set up the regulator with a heatsink, but I prefer not to :3).

SO...
I found another linear voltage regulator like the LM317 called the L200 regulator. This regulator is specified to output up to 2A and has a voltage output that goes down to 2.85V and a voltage input that can go up to 60V.

What I am asking....
How would I go about setting up a "DDL-like" driver with the L200 regulator? Would I need to get different capacitors, diodes, resistors, batteries, etc?

***NOTE***
I will be using a 445nm (4.5V) M140 Diode.
I appreciate any help on this, thanks.


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Old 10-17-2013, 03:10 AM #2
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Default Re: Powerful M140 laser build plan predicament.

Its the same concept as the 317...if you would have taken 5 seconds to google, you could have found what you need pretty quickly (assuming you know how to set up a LM317) : link (look under images, 3rd pic over on top row).
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Old 10-17-2013, 03:29 AM #3
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Default Re: Powerful M140 laser build plan predicament.

I am sorry for the confusion, but I still do not know if the capacitance and resistance need to be changed from 10ufd 16v and 10ohms.
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