Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

LPF Donation via Stripe | LPF Donation - Other Methods

Links below open in new window

ArcticMyst Security by Avery

Blown LOC-815 Macros( Image Heavy )

Joined
Jul 17, 2010
Messages
2,160
Points
0
I had a 815 blow at 100ma tonight, and thought I would put up some Macros of the Diode.

Enjoy

LOC_3_A.jpg
[/IMG]

LOC_8_A.jpg
[/IMG]

LOC_6_A.jpg
[/IMG]

loc_2_A.jpg
[/IMG]

LOC_7_A.jpg
[/IMG]

LOC_5_1.jpg
[/IMG]
 





Joined
Jun 12, 2010
Messages
892
Points
0
You can see that the filament on the left side is off the post.

Actually, it's meant to be like that.

These diodes are case negative, meaning that the negative contact of the diode goes straight to the case of the diode.

Any damage would be to the die itself, and not visible without a microscope.
 
Joined
Jul 17, 2010
Messages
2,160
Points
0
Maybe You guys just can't see it in the pictures, but the left Filament is NOT CONNECTED to anything. Since these diodes are not pumped with thousands of volts It won't magically jump the air gap. I can see in the pictures that it looks as if it's connected to the case, but it's not.
 
Joined
Oct 26, 2007
Messages
5,438
Points
83
You probably only need the top photo. A front-view makes it easier to see the broken connection too. Here's a macro shot I took with a cheap webcam I got from DealExtreme which shows that kind of damage:

attachment.php
 

Attachments

  • wire.jpg
    wire.jpg
    44.3 KB · Views: 243
Joined
Jul 17, 2010
Messages
2,160
Points
0
I used a Canon PowerShot SD630 in macro manual mode. It actually does a pretty good job once You get the correct F stop, exposure settings, and flash timing.
 
Joined
Feb 1, 2008
Messages
2,894
Points
0
You mean 100mA AFTER about 700mA for two minutes? Lol

I don't know why a wire would break at only 100mA, but perhaps running it after COD made the diode extra hot, breaking the connection?
 
Joined
Jul 17, 2010
Messages
2,160
Points
0
WTH COD? If You ever get a LOC up to 700ma please send Us a picture of the current reading! Murphy's Law applies to Diodes too Didn't You know that already?
 
Joined
Feb 1, 2008
Messages
2,894
Points
0
Its been done before... but not for long!

Yeah, after a diode goes COD, it just sits there and heats up! Perhaps thats what broke the wire?
 




Top