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Old 06-03-2011, 02:38 AM #1
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Default Need a little help

I'm having a little trouble between work and the gym and not knowing WTF I'm doing here. LOL

I have these drivers:

$6.97 - 3.6V~9V 800mA Regulated IC Circuit Board for Cree and SSC LEDs (4-pack) - Flashlight Parts and Tools

I want to run this 405 diode:

SF-AW210 6x blu-ray laser lens assembly [M0026] - $18.99 : Modwerx Shop

Can any one PLEASE tell me or even better give me a link to the surface resistor I need to run that diode. I am getting frustrated but still very determined!!!

I could also use a link describing the relationship between ma and mw..... I am not being lazy I am trying!!! Just thought I would send this message in a bottle out to the laser gods.

Thank you guys and gals so much for all the help you have given me thus far..


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Old 06-03-2011, 03:58 AM #2
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Default Re: Need a little help

Not trying to be an ass, and will help if you get stuck. Search for diode compilation and you'll find a thread with the current settings for your diode. Do you have a test load?
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Old 06-03-2011, 07:21 AM #3
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Default Re: Need a little help

Good place to ask, by the way (been helping him out over pm, but I don't know this answer :/ ).
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Old 06-03-2011, 08:48 AM #4
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Default Re: Need a little help

Only one advice, those drivers are BUCK (step down) drivers, not boost drivers ..... you need 2 Li-Ion cells, for run your BR diode, and with 2 cells, you can easily use a linear driver made with a LM1117 or similars.

Other than this, nothing too much special ..... that driver is based on AX2002, or any equivalent ..... the RSET resistor that regulate the current is the 0.27 ohm one, if i read correctly (marked R1, near the black wire), and there is an "empty space" (marked R5) in parallel with that one, so you can solder a second resistor for select different currents.

The VREF of these chips is very low, typically around 0.25V, so in that driver is already set to around 900mA, you can change the current changing the value of this resistor, or using more than one in parallel for lower values (anyway, keep in mind that this chip cannot work over 1A)

For calculate the output current, the formula is current (Ampere) = Vref (0.25) / RSET (ohm) -> in this case, 0.25 / 0.27 = 0.925 ..... for the same Ohm law, if you need to know the resistor value for a specific current, R = V / I.

If you need, as example, 200mA, then the resistor is 0.25 / 0.2 = 1.25 ohm ..... and so on
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Old 06-03-2011, 01:49 PM #5
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Default Re: Need a little help

Quote:
Originally Posted by Coherent Light View Post
Not trying to be an ass, and will help if you get stuck. Search for diode compilation and you'll find a thread with the current settings for your diode. Do you have a test load?
I have this in the mail...........

http://www.modwerx.com/shop/laser-di...vns8jtgupnta21
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Last edited by Crazyk187; 06-03-2011 at 01:50 PM.
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Old 06-03-2011, 03:56 PM #6
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Default Re: Need a little help

With me being so new to all of this. Should I just go ahead and buy this driver

http://hacylon.case.edu/ebay/laser_d..._FlexDrive.php

I'm still going to mess with moding. The buck drivers with the surface mount resistors. But I don't think I'm ready for all that yet. Being my first actual build
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Old 06-03-2011, 04:24 PM #7
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Default Re: Need a little help

Flexdrive is good, but is a bit of time that DrLava have them out-of-stock.

A possibility for use a single cell can be using a boost driver from DX, modifying it for less current (if you need it for the SF.AW210, i doubt you need more than 200mA) ..... like this one, changing the original 0.25 ohm resistor (and adding a pair of capacitors for stability) ..... the VREF of this one is 0.3V, so for 200mA you meed an 1.5 ohm resistor.
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Old 06-06-2011, 04:34 AM #8
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Default Re: Need a little help

The Micro Flex drivers are back in stock now.
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Old 06-06-2011, 05:32 AM #9
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Default Re: Need a little help

I've run a sf-aw210 with a njg-18 without problems. I get High, Med, Low, Strobe, SOS.

US distributor
NJG-18 3-Watt LED driver board (.8 - 7v IN) (2-7v OUT) - e-lectronics.net :

China distributor
http://www.kaidomain.com/ProductDeta...roductID=1672#

Hope that helps
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Old 06-12-2011, 09:32 PM #10
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Default Re: Need a little help

With the njg.....do you have to cycle threw all the settings everytime you turn it on
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Old 06-12-2011, 09:37 PM #11
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Default Re: Need a little help

I have no idea. I have never used that driver. :\ Sorry buddy.
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Old 06-12-2011, 10:24 PM #12
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Default Re: Need a little help

It has a memory. It will return to the mode that you were using last before powering off.
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Would you like to purchase some M-140 445nm diodes (individual or pressed into Aixiz or pure copper module) at very reasonable prices? PM me if you are interested!

My laser list has become way too big; I'm listing some of my favorites out of my extensive collection.
615mw 405nm/12X Spiderfire X-03
148mw 405nm/GGW in my "Hotlight-Saber" host
1920mw 445nm River Rock custom
1530mw 445nm Yobresal
1360mw 445nm Qumefox Sipik
800mw 445nm WL Arctic Spyder S3
240mw 473nm CNI Labby
8mw 473nm CNI Labby
528mw 532nm Lazerer Cannon
310mw 532nm Firedragon III
300mw 532nm CNI Labby
180mw 532nm SKY Laser
4x 147-267mw 532nm Waterproof
900mw 635nm in Temporary Finned Labby Sink
Several 635nm diodes awaiting a build
500mw 650nm Dual LPC-826 Labby
251mw 650nm/LPC-815 Ultrafire U-501B
Several 685nm diodes awaiting a build
3W 808nm diode awaiting build

Kenometer w/ Coherent Thermopile 10W
LaserBee 2.5W USB LPM
Radiant Alpha 2W LPMSOLD=Now in Kuwait!
1.2W RGB Projector; JNM Wide Sky Galvos (Made in Germany); Laser Show Express; Arduino-based DAC
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