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Old 07-08-2012, 09:27 AM #1
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Default Anyone pushed a M140 beyond 2.0A?

Hi all,

I was wondering if anyone had pushed their M140 diode over the 1.8A zone and onto 2.0A.
Yes, I did my research but I don't think anyone dared to push their precious diodes beyond 1.8A.

I ask this because I'm trying out a new build that uses a 5-mode Buck driver from DX linked here.



I've considered the new 9mm 445's but they seem to be too expensive.

Also, I know there's a great thread about using flashlight drivers, but I'm looking for one that has 5-modes can drive a diode to exactly 1.8A.

Thanks to Dogsbestfriend for helping me out on this project.

Cheers!


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Old 07-09-2012, 04:29 AM #2
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Default Re: Anyone pushed a M140 beyond 2.0A?

Yes, I have pushed many to 2A. Some of them like the extra current. Others prefer it to be a bit less and you will not get anymore output out of them. Some will even output less at 2A then they do at 1.8A. Really depends on the specific diode you get. Chances are it will not kill it. Just test that driver out first and make sure it isn't putting out like 2200 or 2300mA.
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Old 07-09-2012, 04:56 AM #3
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Default Re: Anyone pushed a M140 beyond 2.0A?

Thank you, thank you, and thank you.
That's the exact answer I've been looking for.

Had I been knowledgeable about circuits I would have modded the DX driver to output 1.8A.

How much does the extra 0.2A reduce the duty cycle?

Cheers!
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Old 07-13-2012, 03:52 PM #4
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Default Re: Anyone pushed a M140 beyond 2.0A?

If your running the M140 diode that high I would hope you considered a really good cooling method first.
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Old 07-13-2012, 08:47 PM #5
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Default Re: Anyone pushed a M140 beyond 2.0A?

Quote:
Originally Posted by jander6442 View Post
If your running the M140 diode that high I would hope you considered a really good cooling method first.
Yeah, I think I'm going to use a moderately large aluminium heatsink (copper's too heavy for a flashlight with a big head) with a really really short duty cycle, about 10-15 sec.

I'm trying to get a 5-mode driver work with the M140 so that it would have long-lasting low and mid power modes.

Thanks for your help.
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Old 07-13-2012, 09:22 PM #6
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Default Re: Anyone pushed a M140 beyond 2.0A?

I ordered one for examination. Curious to see if the output is stable and is really 2A

Greetings,,
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Old 07-13-2012, 09:32 PM #7
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Default Re: Anyone pushed a M140 beyond 2.0A?

Great! Thanks for testing it.
Hopefully the driver is a functional buck that can power LD's as well.

Tsteele has one ordered as well and is gonna hook it up with his scope to detect any fluctuations or spikes.

Cheers!
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Old 07-20-2012, 10:47 PM #8
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Default Re: Anyone pushed a M140 beyond 2.0A?

Perhaps you can replace the resistor(s) to yield the desired 1.8A?
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Old 07-21-2012, 03:19 AM #9
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Default Re: Anyone pushed a M140 beyond 2.0A?

Quote:
Originally Posted by Blutquell View Post
Perhaps you can replace the resistor(s) to yield the desired 1.8A?
Yup, I thought of doing that, but I don't have an original schematic of the circuit. I think DX or the supplier rub off the chip model number, so it's pretty much a hit or miss.

Thanks for the suggestion though.

Quote:
Originally Posted by offroadfreak8582 View Post
I ordered one for examination. Curious to see if the output is stable and is really 2A

Greetings,,
Offroadfreak, have you gotten your driver yet? I'm dying to know the results!

Cheers!
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Old 11-27-2012, 01:46 AM #10
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Default Re: Anyone pushed a M140 beyond 2.0A?

Any results? I'm curious. I will likely end up building my M140 with an X-Drive but IMO the most optimal set up is a driver that switches between Low-High on a quick on-off so I can use a reverse clicky to accurately and quickly etch stuff with the laser.

Maybe we could somehow find a driver with AMC 7135x5 for 350mA * 5 = 1750mA driver for this purpose. It would most likely only be capable of low-med-high which I suppose might work okay. Hmm, low-duty-cycle PWM could be interesting too, it would etch dotted lines.

I dunno. It isn't honestly that hard to do it accurately with a regular laser because I can just hold it closer or farther a bit to defocus and then it wont burn. But modes are still cool.
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Old 11-27-2012, 06:22 AM #11
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Default Re: Anyone pushed a M140 beyond 2.0A?

Quote:
Originally Posted by arcaneinsomniac View Post
Any results? I'm curious. I will likely end up building my M140 with an X-Drive but IMO the most optimal set up is a driver that switches between Low-High on a quick on-off so I can use a reverse clicky to accurately and quickly etch stuff with the laser.

Maybe we could somehow find a driver with AMC 7135x5 for 350mA * 5 = 1750mA driver for this purpose. It would most likely only be capable of low-med-high which I suppose might work okay. Hmm, low-duty-cycle PWM could be interesting too, it would etch dotted lines.

I dunno. It isn't honestly that hard to do it accurately with a regular laser because I can just hold it closer or farther a bit to defocus and then it wont burn. But modes are still cool.
An AMC based linear driver won't work because the Vf of a laser diode is higher than that of a 3.7-4.2V cell. You can either use two cell configuration (low efficiency due to heat) or a boost driver.

I think lazeerer can get you an X-Drive with mode memory, you should ask him.

I use a cheapie DX buck driver and that has been performing very well with 5-mode memory.

Cheers!
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Old 11-27-2012, 09:30 AM #12
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Default Re: Anyone pushed a M140 beyond 2.0A?

Quote:
Originally Posted by arcaneinsomniac View Post
Any results? I'm curious. I will likely end up building my M140 with an X-Drive but IMO the most optimal set up is a driver that switches between Low-High on a quick on-off so I can use a reverse clicky to accurately and quickly etch stuff with the laser.

Maybe we could somehow find a driver with AMC 7135x5 for 350mA * 5 = 1750mA driver for this purpose. It would most likely only be capable of low-med-high which I suppose might work okay. Hmm, low-duty-cycle PWM could be interesting too, it would etch dotted lines.

I dunno. It isn't honestly that hard to do it accurately with a regular laser because I can just hold it closer or farther a bit to defocus and then it wont burn. But modes are still cool.

I think a driver with multiple modes is not the best way one could do this. Wouldn't it be easier to place a resistor inline with the positive lead going to the diode and then rig a switch(or foot pedal) that bypasses the resistor thus giving you a default of low output and then hit the switch and kick into high. That way you could theoretically switch modes infinitely fast with no risk of diode damage and its so simple that its not likely to mess up.

Just my two cents.
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Old 11-27-2012, 12:58 PM #13
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Default Re: Anyone pushed a M140 beyond 2.0A?

Good thinking Apex.

And yeah looks like buck is the way to go for these 445's.
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M-140 445nm @ 1800mA Lazeerer X-Drive 2x14430 host thanks Ehgemus
Crooked 500mW O-Like Crown 532nm thanks Susie (but damnit, it's mounted crooked)
Mitsubishi "300mW" 638nm @ 775mA in Solarforce L2T Waterproof
A-140 445nm @ 1500mA flexdrive, Aixiz 445 lens in Solarforce L2P Waterproof thanks Jayrob
BDR-S06J @475mA L2P thanks Flaminpyro
LPC-826 in Aurora SH-032 Stainless @417mA
PHR-803T @ 85mA
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Old 11-27-2012, 07:20 PM #14
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Default Re: Anyone pushed a M140 beyond 2.0A?

For this situation buck is the best option I agree. You could always go with a boost driver if your goal was small size but I am guessing stability, battery life, and longevity are more of a concern.

After this though I am considering grabbing a couple mode drivers to do some testing with. I think a variable power laser would be pretty cool.
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Some of the collection:
-405nm -811mW - S06J@490mA - Aurora C6
-445nm -3.04W - 9mm@2.2A - Ultrafire L2
-445nm -2.95W - M140@2A - "Hyperion" Black Ice/Flash Freeze hybrid
-445nm -2.2W - M140@1.8A - Aurora C6
-445nm -1.93W - M140@1.8A - Blue Ice by yobresal
-450nm -1.67W - PLTB450@1.7A - Survival Laser S4
-488nm ~25mW - "The Beast" JDSU Argon Ion
-520nm -132mW - PL520@390mA - Minisabre V2
-532nm -374mW - Skylaser HL532 300mW
-532nm -90mW - SD-303
-532nm -110mW - 50mW FastTech Module - DTR Skyray
-543nm ~.3mW Melles Griot HeNe
-638nm -1.3W - ML501P73@1.5A - Survival Laser S4
-638nm -1W - ML501P73@1.4A - Ultrafire WF-602C
-650nm -324mW - 3.8mm OpenCan@428mA - C6
-650nm -128mW - 3.8mm OpenCan@200mA - C6 (Mohgasm JAD)
Laserbee II 3.2W and 5W Ophir LPM
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Old 11-28-2012, 02:32 AM #15
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Default Re: Anyone pushed a M140 beyond 2.0A?

Quote:
Originally Posted by ApexProxy View Post
After this though I am considering grabbing a couple mode drivers to do some testing with. I think a variable power laser would be pretty cool.
I would recommend this driver: 3V~8.4V 5W Cree 5-Mode Circuit Board for Flashlights (16.8mm*6.3mm) - Worldwide Free Shipping - DX

I'm using it to drive my 1.8A build with a sense resistor mod to 0.15 Ohms.

Good luck!
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Old 11-28-2012, 04:39 AM #16
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Default Re: Anyone pushed a M140 beyond 2.0A?

Quote:
Originally Posted by ryansoh3 View Post
I would recommend this driver: 3V~8.4V 5W Cree 5-Mode Circuit Board for Flashlights (16.8mm*6.3mm) - Worldwide Free Shipping - DX

I'm using it to drive my 1.8A build with a sense resistor mod to 0.15 Ohms.

Good luck!
What kind of driver is it? boost/buck/both?
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When setting up LFI make sure you check the "Laser On" Option to turn on the signal!! This took me forever to figure out.
M-140 445nm@ 1800mA in L2X body (I have both a 2x18650 and 1x18650 L2X tubes that I drive with either 2x18650 or 2xIMR18350) with G2 LFL lens
Mitsubishi "500mW" 638nm @ 1400mA in Solarforce P1D Grey, beautiful custom Copper heatsink in a waterproof configuration and with a G2 lens You have outdone yourself Flaminpyro!
M-140 445nm @ 1800mA Lazeerer X-Drive 2x14430 host thanks Ehgemus
Crooked 500mW O-Like Crown 532nm thanks Susie (but damnit, it's mounted crooked)
Mitsubishi "300mW" 638nm @ 775mA in Solarforce L2T Waterproof
A-140 445nm @ 1500mA flexdrive, Aixiz 445 lens in Solarforce L2P Waterproof thanks Jayrob
BDR-S06J @475mA L2P thanks Flaminpyro
LPC-826 in Aurora SH-032 Stainless @417mA
PHR-803T @ 85mA
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