Laser pointer discussion. Read/write reviews of laser pointers and laser pointer companies. Learn about all types of laser pointers and lasers





Welcome to Laser Pointer Forums! If you are looking for a laser pointer or want to compare different laser pointer companies, you may want to check out the LPF Laser Pointer Company Database. The link will open in a new window for your convenience.








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes
Laser Technology Laser Pointer Parts Lasers by Wavelength
Top 10 Laser Pointer Companies Laser Pointer Company Database Visible Beam Laser Pointers


One laser store meets all your needs

























Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > 445nm Lasers



LPF List of Laser Pointer Companies (link opens new window)



Reply
 
LinkBack Thread Tools Display Modes
Old 01-30-2013, 12:00 AM #1
Junior Member
 
Join Date: May 2009
Location: Germany
Posts: 6
Rep Power: 0
TomTheDragon is on a distinguished road
TomTheDragon TomTheDragon is offline
Junior Member
 
Join Date: May 2009
Location: Germany
Posts: 6
Rep Power: 0
TomTheDragon is on a distinguished road
Default A-140 diode died at 300mA

Hello everyone,

i just seen some A-140 diodes for a really good price on ebay so i decide it to build my first 445nm laser. My idea was to use it as a low power blue (100-200mw) with two old HDDs to build a simple laser projector
I already had some spare parts like, hosts and drivers from older laser-kits, so i chosen one i also used for a couple of DVD-burner diodes.

So i started some testing on this baby and set the driver (LM317 based) to 300mA (which should be ~100mW) and tried to burn something, to test the power output which was working fine and i was so happy about this nice color from this little diode but.. then it happens: I turn it on and after maybe 0,5sec it was dead.. or at least very dim as you can see on the pictures. I am really not sure what happened because i was turning it on and off a couple times wile i was testing


I am thinking to maybe get an another diode but i first need to know what i can do better or if that guy on ebay solid me a shitty diode.. so i am asking you guys.


__________________
--- Sorry for my bad english, i am from germany ---
TomTheDragon is offline   Reply With Quote







LPF List of Laser Pointer Companies (link opens new window)







Old 01-30-2013, 12:05 AM #2
Blord's Avatar
Class 4 Laser
 
Join Date: Dec 2007
Location: Belgium
Posts: 5,368
Rep Power: 770
Blord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond repute
Blord Blord is offline
Class 4 Laser
Blord's Avatar
 
Join Date: Dec 2007
Location: Belgium
Posts: 5,368
Rep Power: 770
Blord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond reputeBlord has a reputation beyond repute
Default Re: A-140 diode died at 300mA

You shouldn't put the build on blanket. Static electricity can easily kill you diode.
__________________
405nm 400mW S06J C6
445nm 3W Big Boy, 2.8W Dominator, 2.4W Steel Laser
450nm 240mW PL450 C6
473nm 100mW PGL-III-C-473
520nm 55mW Skylaser PL520
532nm 821mW Skylaser PL532, 133mW Jetlasers Ti-B
589nm 100mW PGL-III-C-589
635nm 70mW Sanyo SenTorch
638nm 175mW Ehgemus, 1W Rook
660nm 1216mW Skylaser PL660, 263mW LPC826 C6
685nm 33mW Fujitsu FLD6A2TK C6
780nm 150mW Dilda
808nm 640mW C6

I have copper 501B and Dominator lasers for sale !
Blord is offline   Reply With Quote
Old 01-30-2013, 12:12 AM #3
Junior Member
 
Join Date: May 2009
Location: Germany
Posts: 6
Rep Power: 0
TomTheDragon is on a distinguished road
TomTheDragon TomTheDragon is offline
Junior Member
 
Join Date: May 2009
Location: Germany
Posts: 6
Rep Power: 0
TomTheDragon is on a distinguished road
Default Re: A-140 diode died at 300mA

Quote:
Originally Posted by Blord View Post
You shouldn't put the build on blanket. Static electricity can easily kill you diode.
I just did this after the diode died for the pictures because the table i was testing on was really full of stuff.
__________________
--- Sorry for my bad english, i am from germany ---
TomTheDragon is offline   Reply With Quote
Old 01-30-2013, 12:17 AM #4
Meatball's Avatar
Class 3B Laser
 
Join Date: Feb 2008
Location: Lincoln, NE
Posts: 2,989
Rep Power: 242
Meatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond repute
Meatball Meatball is offline
Class 3B Laser
Meatball's Avatar
 
Join Date: Feb 2008
Location: Lincoln, NE
Posts: 2,989
Rep Power: 242
Meatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond reputeMeatball has a reputation beyond repute
Default Re: A-140 diode died at 300mA

Did you short your capacitor out before you reconnected your diode after your DMM measurement? There would be energy left in there that will kill a diode if you had to re-make a connection to the diode.
__________________
FIAT LUX

(\__/)
(='.'=)
(")_(")
Meatball is offline   Reply With Quote
Old 01-30-2013, 12:19 AM #5
DTR's Avatar
DTR DTR is online now
Class 4 Laser
 
Join Date: Jun 2010
Location: St. Louis MO
Posts: 5,482
Rep Power: 10819
DTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond repute
DTR DTR is online now
Class 4 Laser
DTR's Avatar
 
Join Date: Jun 2010
Location: St. Louis MO
Posts: 5,482
Rep Power: 10819
DTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond repute
Default Re: A-140 diode died at 300mA

One thing I would suggest is to always have solid soldered connections between the driver and the diode. Intermittent connections could cause a spike. It is possible that in power cycling it there could have been a spike as well. Also all the A140 projectors that can be purchased right now are either used or manufacturer refurbished so the diodes will have an unknown amount of time on them so there could be questionable quality with them as well.
DTR is online now   Reply With Quote
Old 01-30-2013, 01:42 AM #6
Bionic-Badger's Avatar
Class 4 Laser
 
Join Date: Oct 2007
Location: Oregon, USA
Posts: 5,476
Rep Power: 1792
Bionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond repute
Bionic-Badger Bionic-Badger is offline
Class 4 Laser
Bionic-Badger's Avatar
 
Join Date: Oct 2007
Location: Oregon, USA
Posts: 5,476
Rep Power: 1792
Bionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond repute
Default Re: A-140 diode died at 300mA

If that's the heatsink, it's really not enough. Output power of 100-200mW is definitely too much power to trust to a plain ol' Aixiz module and that tiny heatsink; I've burned out reds at 60mW with "heatsinking" like that.
__________________
You must spread some Reputation around before giving it to <person> again.
Bionic-Badger is offline   Reply With Quote
Old 01-30-2013, 02:37 AM #7
Junior Member
 
Join Date: May 2009
Location: Germany
Posts: 6
Rep Power: 0
TomTheDragon is on a distinguished road
TomTheDragon TomTheDragon is offline
Junior Member
 
Join Date: May 2009
Location: Germany
Posts: 6
Rep Power: 0
TomTheDragon is on a distinguished road
Default Re: A-140 diode died at 300mA

Quote:
Originally Posted by Meatball View Post
Did you short your capacitor out before you reconnected your diode after your DMM measurement? There would be energy left in there that will kill a diode if you had to re-make a connection to the diode.
I killed two other red diodes by doing this.. so i installed a little extra resistor to the out of the driver (under the black tape), which unloads it. But i never disconnected the diode, i always had it in this setup wile testing with the multimeter turned on.

Quote:
Originally Posted by Bionic-Badger View Post
If that's the heatsink, it's really not enough. Output power of 100-200mW is definitely too much power to trust to a plain ol' Aixiz module and that tiny heatsink; I've burned out reds at 60mW with "heatsinking" like that.
It was just for the testing, i never run it longer then a half minute or so and it never was getting much warmer then my hand.. i wanted to add a much bigger cooler later and also add a 90mm fan for cooling the diode and the driver.
I was running a 300mw DVD-burner diode with this little cooler and 90mm fan before i used it for this tests and it was running at 220mA just fine for hours


I personally think that maybe the power supply could be the problem, so i just need an better driver or make this one safer..
I also have two other drivers which are by far better but they can be just used for red diodes (because of the working voltage) and can only set to max 150mA i think.. but they have a nice soft on feature. So you can see how the diode fades in an ~0.5sec. I wonder if i could get something like this cheap for a 445mn diode.
__________________
--- Sorry for my bad english, i am from germany ---

Last edited by TomTheDragon; 01-30-2013 at 02:41 AM.
TomTheDragon is offline   Reply With Quote
Old 01-30-2013, 05:46 PM #8
Th3dArKn3o's Avatar
Class 1M Laser
 
Join Date: Dec 2012
Location: Germany Black Forest :)
Posts: 121
Rep Power: 12
Th3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to behold
Th3dArKn3o Th3dArKn3o is offline
Class 1M Laser
Th3dArKn3o's Avatar
 
Join Date: Dec 2012
Location: Germany Black Forest :)
Posts: 121
Rep Power: 12
Th3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to behold
Default Re: A-140 diode died at 300mA

Could be just a crappy diode from the seller !
On your next diode do all ESD precautions add a little heatsink and test you driver and it shouldn't happen again !
Th3dArKn3o is offline   Reply With Quote
Old 01-30-2013, 08:35 PM #9
Junior Member
 
Join Date: May 2009
Location: Germany
Posts: 6
Rep Power: 0
TomTheDragon is on a distinguished road
TomTheDragon TomTheDragon is offline
Junior Member
 
Join Date: May 2009
Location: Germany
Posts: 6
Rep Power: 0
TomTheDragon is on a distinguished road
Default Re: A-140 diode died at 300mA

Quote:
Originally Posted by Th3dArKn3o View Post
Could be just a crappy diode from the seller !
It was this one here --> 445nm 1W Blue Laser Diode TO18/5.6mm | eBay
Oh well.. at least this diode was cheap.
__________________
--- Sorry for my bad english, i am from germany ---

Last edited by TomTheDragon; 01-30-2013 at 08:36 PM.
TomTheDragon is offline   Reply With Quote
Old 01-31-2013, 03:21 PM #10
Th3dArKn3o's Avatar
Class 1M Laser
 
Join Date: Dec 2012
Location: Germany Black Forest :)
Posts: 121
Rep Power: 12
Th3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to behold
Th3dArKn3o Th3dArKn3o is offline
Class 1M Laser
Th3dArKn3o's Avatar
 
Join Date: Dec 2012
Location: Germany Black Forest :)
Posts: 121
Rep Power: 12
Th3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to behold
Default Re: A-140 diode died at 300mA

Cheap is not always the best you should learn from this
Th3dArKn3o is offline   Reply With Quote
Old 01-31-2013, 08:55 PM #11
Eudaimonium's Avatar
Class 4 Laser
 
Join Date: Feb 2008
Location: Pitomača, Croatia
Posts: 6,295
Rep Power: 427
Eudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond repute
Send a message via Skype™ to Eudaimonium
Eudaimonium Eudaimonium is offline
Class 4 Laser
Eudaimonium's Avatar
 
Join Date: Feb 2008
Location: Pitomača, Croatia
Posts: 6,295
Rep Power: 427
Eudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond reputeEudaimonium has a reputation beyond repute
Send a message via Skype™ to Eudaimonium
Default Re: A-140 diode died at 300mA

Wrong,

I'll say it's not the heatsinking, I've ran diodes way past 1W in plain old Aixiz. You'd be surprised how much heat energy can those diodes actually endure. It's not a problem.

It's the non-solid connection. The alligator clamps between driver and diode killed your diode. Basically all you need is a few microseconds of dropped connection. In that time, the capacitor charges up, and at next re-connection, it discharges into the diode - Bad sh*t.

Next time, either get rid of capacitor, or make solid soldered connections.

A diode ran at 300mA would need what, 4.0 Volts, which is 1.5 W, which is around 1.3-1.4 Watts of heat - it's not critical and plain Aixiz will do for short 10-seconds-max runs.
__________________
Accepting and
^Click to enter^

The "Where to get laser components" big compilation thread!

Are you new and need help? Instead of starting new threads, shoot me a Personal Message! I'll answer all the beginner's and advanced questions you might have!

Eudaimonium is offline   Reply With Quote
Old 01-31-2013, 11:43 PM #12
justinjja's Avatar
Class 2M Laser
 
Join Date: Mar 2011
Location: Texas
Posts: 692
Rep Power: 52
justinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond repute
justinjja justinjja is offline
Class 2M Laser
justinjja's Avatar
 
Join Date: Mar 2011
Location: Texas
Posts: 692
Rep Power: 52
justinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond reputejustinjja has a reputation beyond repute
Default Re: A-140 diode died at 300mA

Eudaimonium is correct,
also buy from DTR, That ebay sale was $41 w/ shipping...

A140 if you want it
https://sites.google.com/site/dtrlpf...0-445nm-diodes

Or the better M140 for not much more
https://sites.google.com/site/dtrlpf...45-m140-didoes
__________________
"V=IR It's not a suggestion it's the law"
-georg simon ohm
justinjja is offline   Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On











Loading








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes






Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 07:48 PM.


Powered by: vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC