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Old 01-06-2011, 02:33 AM #1
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Default First build: 405nm 100mW diode + drivers, what did I do wrong?

Just yesterday I got my parts in the mail, just in time to assemble everything while I have time before school starts again. Below are the items I bought.

Bought this because it had the drivers already.
405nm mini blue laser AixiZ exclusive 8x13mm adj lens on eBay.ca

Used it with this diode.
New 100mW 405nm Blue-Violet blu-ray Laser Diode on eBay.ca

I just finished soldering everything together (I'm quite good at that ), so I'm hoping it wasn't that. From what I read on the driver's description, it had an operating range of 5DVC, and I know that AA batteries are 1.5V so 3xAA would be the maximum (correct me if I'm wrong). The output at the end, when powered by 2xAA batteries, was not what I had expected. The purple color is barely visible even in a dark room.

Can someone help me, a first time builder, isolate the problems and possibly save his project?



Last edited by Infertile; 01-06-2011 at 03:54 AM.
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Old 01-06-2011, 02:45 AM #2
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Default Re: First build: 450nm 100mW diode + drivers, what did I do wrong?

it is 405nm. just to another members to read it

possibilities, from the most probable to the lower probable:
1: you are using a 100mW diode with a 5mW driver (low current supplied)
2: you damaged the laser diode while soldering (if you soldered direct on it)
3: the driver had an operating range of 5+ volts, but the diode you soldered in is 4~4.5v (you are suppling 4.5v to a 5v min. driver)
4: you already burned the diode when turning it on, due to the small (VERY SMALL) module, and the heat generated when soldering/powering the diode.

try putting your hand on the laser beam, and see it burns or heats you
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Old 01-06-2011, 04:00 AM #3
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Default Re: First build: 405nm 100mW diode + drivers, what did I do wrong?

Number 1 was correct. How could I overlook my purchase like that? You're right, the driver is only for 5mW diodes. I'm going to be ordering the item below.

405nm 100-300mw Laser Diode Driver Reverse Protection on eBay.ca

I'll just have to wait another week to start my build up again. This item will work... right? Don't want to waste more money

PS> Thanks, correction made to the title.
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Old 01-06-2011, 10:57 PM #4
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Default Re: First build: 405nm 100mW diode + drivers, what did I do wrong?

buy a better one: http://hacylon.case.edu/ebay/laser_diode/Groove_2.php with preset current or u set it yourself or
Micro-Drive V3 adjustable driver (assembled) - $13.00 : rkcstr.com, Micro-Drive and laser diode electronics
and set it yourself
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Old 01-07-2011, 02:03 AM #5
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Default Re: First build: 405nm 100mW diode + drivers, what did I do wrong?

...or build one for $2
search for DDL Driver
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