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Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > Drivers, Test-load, Power Supply, & Batteries



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Old 02-24-2013, 06:40 AM #1
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Default trouble driving first laser build...

Hi all,
I bought a MITSUBISHI/658nm-660nm 300-400mw CW Red Laser Diode/LPC-826

Mitsubishi 658nm 660nm 300 400mW CW Red Laser Diode LPC 826 | eBay

Im trying to use two 2Pcs 3.7V 1200mAh Li-on Rechargeable Batteries...

Amazon.com: 2Pcs 3.7V 1200mAh Li-on Rechargeable Batteries: Electronics

I already have a host and mounted the diode in the aixiz housing, I also purchased a glass lense instead of the acrylic one...

the driver I have was off ebay, I wired everything up to test it out and the laser just blinks on for a sec real dim when I press the button... its like the diode isnt getting enough power or something?

this is the driver I got...

808nm 100 500mW Laser Diode Driver Reverse Protection | eBay

Im having trouble finding a small cheap driver that will work with this, maybe I should use different batteries? ... any help would be great, this is my first build...

thanks!



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Old 02-24-2013, 08:52 AM #2
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Default Re: trouble driving first laser build...

Try one of these drivers

Drivers : Mohgasm LLC, Have you experienced one lately?

Edit: the linear driver would be good at 428ma or 478ma which runs off of 2x 3.7v batteries, or the ben boost mini which runs off of 1x 3.7v batty

Edit 2: scratch the benboost mini, they are not compatible with red diodes

Edit 3: IMHO pots (potentiometers/variable resestors) are crap, you should just get a fixed value driver
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Old 02-24-2013, 08:56 AM #3
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Default Re: trouble driving first laser build...

What did you set the current at? The driver you ordered has a pot, so you can set it...

Edit: Did you put the battery in the correct way? The driver is set up for a case positive diode ie it regulates through negative side
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Old 02-24-2013, 09:37 PM #4
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Default Re: trouble driving first laser build...

thank you grainde, already read those, have glasses etc... I agree with jolly think its just a pos driver...
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Old 02-25-2013, 06:43 AM #5
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Default Re: trouble driving first laser build...

Quote:
Originally Posted by inSINaRAYter View Post
thank you grainde, already read those, have glasses etc... I agree with jolly think its just a pos driver...
The driver regulates through the negative (the spring on the driver board is negative) and the case positive. You can still use it, but you need to isolate the case or host from the diode. Ie use an anodized heat sink that isolates the diode and module from the case positive host. You then just pick up the positive at the pill and wire it to the pos pin on the diode.
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New to lasers & want some info on how to build a laser? Look here: Build a laser

Need info on goggles? Look here: Get safety goggles now!

FS Custom Sinner Host builds available now!


Here is my old Kryton Groove FS thread!

100mW 405 PHR
700mW 405

2W 445 C6--link--
+2.3W 445 --link--
+2.5W 445 --link--

190mW 450 --link--
15mW 510nm
5mW 532 --link--
25mW 532 --link--

520mW 638 --link--
1W 638

250mW 650
250mW 780

3000 Lm C8 MTG2 @ 6 A!
Poppas mod 3A --link--
Sipik 98 Cu pill/star mod --link--

Last edited by grainde; 02-25-2013 at 06:44 AM.
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