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Old 02-22-2017, 05:13 PM #1
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Default M140 laser module help!

I have a 2w 445nm M140 laser module but I can't get it powered for some reason.
I'm running 7 volts through a 1.25A Diode Driver that I bought on line but all I'm getting is a faint blue light coming from the diode. Any help would be greatly appreciated. Thanks!


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Old 02-22-2017, 05:19 PM #2
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Default Re: M140 laser module help!

Which driver did you get? Do you have pictures of your setup? Did you verify that the driver is putting out 1.25A? Did you power up the driver without the diode hooked up, then hook up the diode without first dissipating any charge stored in the drivers output capacitor?
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Old 02-22-2017, 05:22 PM #3
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Default Re: M140 laser module help!

Survival Laser Driver
This is the exact diode that I'm using. My multimeter won't read amperage from DC so I'm not sure how to text what the driver is putting out. Honestly I'm pretty new to this stuff so I'm not exactly sure what the next step is in figuring out the problem.
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Old 02-22-2017, 06:02 PM #4
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Default Re: M140 laser module help!

Ide say hook up your driver to a test load so you can see what it's putting out. Lots of info on test loads on this forum
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Old 02-23-2017, 01:22 AM #5
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Default Re: M140 laser module help!

Search out threads on dummy loads or test loads. It is very easy to build and use and necessary to test drivers or to set the current on adjustable drivers. Your DMM will work for this purpose.
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Old 02-26-2017, 10:15 PM #6
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Default Re: M140 laser module help!

Check out the thread I posted recently about my NUBM44 build. A couple useful links in there about building the test load for it. Good luck!
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