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 > Tutorials, Help & Repairs



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



Reply
 
LinkBack Thread Tools Display Modes
Old 02-07-2011, 11:59 PM #1
Junior Member
 
Join Date: Jan 2011
Location: Windsor, Ontario, Canada
Posts: 12
Rep Power: 0
WastedEmu is on a distinguished road
WastedEmu WastedEmu is offline
Junior Member
 
Join Date: Jan 2011
Location: Windsor, Ontario, Canada
Posts: 12
Rep Power: 0
WastedEmu is on a distinguished road
Default 445nm LED'd?

I've built a few lasers before and have never had one go on me (atleast until right now? lol)
i'm running the diode with an LM317, and a 1ohm resistor, and it isnt outputting very much light at all. the LM317 does get very very hot within seconds, could this be a problem?

i had this circuit, and diode working just fine a few hours ago and just turned it on again and this happened...


WastedEmu is offline   Reply With Quote







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







Old 02-08-2011, 12:13 AM #2
Class 3R Laser
 
Join Date: Nov 2010
Location: Portugal
Posts: 2,470
Rep Power: 84
anselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond repute
anselm anselm is offline
Class 3R Laser
 
Join Date: Nov 2010
Location: Portugal
Posts: 2,470
Rep Power: 84
anselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond repute
Default Re: 445nm LED'd?

At 1.25A you need to heatsink-and-then-some both the driver and the diode.
What's the diode housed in?
I suppose your lm137 is "barenaked" so to say?
Does the diode start bright then goes dim within seconds?
What's your power source? Maybe the batteries are just low.

Oh, and welcome to the LPF!
__________________
I'm away from home and lasers until late July!
Kryton Groove switch workaround
Get your warning label stickers 0.90$ or less, depending on qty
The INDEX to the LPF
Add to it, and spam it from your signature, too!
Beware! Scams a-plenty, don't be a sucker!
___________________________
ATTENTION
This forum is fullfilled mit special electronische equippment. Fingergrabbing and pressing the cnoeppkes from the lasers is
allowed for die experts only! So all the “lefthanders” stay away and do not disturben the brainstorming von here working
intelligencies. Otherwise you will be out thrown and kicked anderswhere! Also: please keep still and only watchen astaunished the blinkenlights.

Last edited by anselm; 02-08-2011 at 12:16 AM.
anselm is offline   Reply With Quote
Old 02-08-2011, 12:17 AM #3
Junior Member
 
Join Date: Jan 2011
Location: Windsor, Ontario, Canada
Posts: 12
Rep Power: 0
WastedEmu is on a distinguished road
WastedEmu WastedEmu is offline
Junior Member
 
Join Date: Jan 2011
Location: Windsor, Ontario, Canada
Posts: 12
Rep Power: 0
WastedEmu is on a distinguished road
Default Re: 445nm LED'd?

thanks for the quick reply

i have the diode housed in an Aixiz module, and in the heatsink from modwerx ( Lab style heatsink for 12mm laser modules [M0020] - $20.99 : Modwerx Shop )

and yes the lm317 is just bare for now since it is on just a breadboard. i don't know how trust worthy the power supply is tho seeing as its an older breadboard from my college
WastedEmu is offline   Reply With Quote
Old 02-08-2011, 12:24 AM #4
Benm's Avatar
Class 4 Laser
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,432
Rep Power: 17686
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Benm Benm is online now
Class 4 Laser
Benm's Avatar
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,432
Rep Power: 17686
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Default Re: 445nm LED'd?

The LM317 has built-in thermal protection, so if it does overheat, it will cut output power to save itself. The heatsink on the laser diode is big enough to prevent the diode from overheating before the lm317 does, so i don't see a problem there, unless you somehow managed to install the diode or module without proper thermal contact.

I would get a new 317 and put a heatsink on it, and retry with the existing diode. Normally those 317s are darn hard to kill, but once in a while it does happen.
Benm is online now   Reply With Quote
Old 02-08-2011, 12:25 AM #5
Class 3R Laser
 
Join Date: Nov 2010
Location: Portugal
Posts: 2,470
Rep Power: 84
anselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond repute
anselm anselm is offline
Class 3R Laser
 
Join Date: Nov 2010
Location: Portugal
Posts: 2,470
Rep Power: 84
anselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond repute
Default Re: 445nm LED'd?

Well breadboards are notorious for unreliable contacts.
Do you have any capacitors in your circuit? If so where?
A capacitor on the output, parallel to the diode could blow it if the
contact were to be interrupted and reestablished, for example.

In any case, the lm317 is going into thermal protect at this current without a generous
chunk of metal attached to it.
__________________
I'm away from home and lasers until late July!
Kryton Groove switch workaround
Get your warning label stickers 0.90$ or less, depending on qty
The INDEX to the LPF
Add to it, and spam it from your signature, too!
Beware! Scams a-plenty, don't be a sucker!
___________________________
ATTENTION
This forum is fullfilled mit special electronische equippment. Fingergrabbing and pressing the cnoeppkes from the lasers is
allowed for die experts only! So all the “lefthanders” stay away and do not disturben the brainstorming von here working
intelligencies. Otherwise you will be out thrown and kicked anderswhere! Also: please keep still and only watchen astaunished the blinkenlights.
anselm is offline   Reply With Quote
Old 02-08-2011, 12:36 AM #6
Junior Member
 
Join Date: Jan 2011
Location: Windsor, Ontario, Canada
Posts: 12
Rep Power: 0
WastedEmu is on a distinguished road
WastedEmu WastedEmu is offline
Junior Member
 
Join Date: Jan 2011
Location: Windsor, Ontario, Canada
Posts: 12
Rep Power: 0
WastedEmu is on a distinguished road
Default Re: 445nm LED'd?

i may have killed the lm317, i tried changeing the resistance to about 11 ohms to use it with one of the phr-803t LDs and nothing.

i don't have a capacitor in this circuit, the only 2 components are the LM317, and the resistor.

i can easily get more lm317's from my college, and this time I for sure will attach it to a heatsink from an old computer

Last edited by WastedEmu; 02-08-2011 at 12:43 AM.
WastedEmu is offline   Reply With Quote
Old 02-08-2011, 12:50 AM #7
Junior Member
 
Join Date: Jan 2011
Location: Windsor, Ontario, Canada
Posts: 12
Rep Power: 0
WastedEmu is on a distinguished road
WastedEmu WastedEmu is offline
Junior Member
 
Join Date: Jan 2011
Location: Windsor, Ontario, Canada
Posts: 12
Rep Power: 0
WastedEmu is on a distinguished road
Default Re: 445nm LED'd?

Quote:
Originally Posted by Benm View Post
unless you somehow managed to install the diode or module without proper thermal contact.
also, i don't know what you mean by that part of your response? i've never made a laser this powerful before
WastedEmu is offline   Reply With Quote
Old 02-08-2011, 12:56 AM #8
Coherent Light's Avatar
Class 3R Laser
 
Join Date: Jul 2010
Location: Hill Country, TX
Posts: 2,185
Rep Power: 51
Coherent Light has a reputation beyond reputeCoherent Light has a reputation beyond reputeCoherent Light has a reputation beyond reputeCoherent Light has a reputation beyond reputeCoherent Light has a reputation beyond reputeCoherent Light has a reputation beyond reputeCoherent Light has a reputation beyond reputeCoherent Light has a reputation beyond reputeCoherent Light has a reputation beyond reputeCoherent Light has a reputation beyond reputeCoherent Light has a reputation beyond repute
Coherent Light Coherent Light is offline
Class 3R Laser
Coherent Light's Avatar
 
Join Date: Jul 2010
Location: Hill Country, TX
Posts: 2,185
Rep Power: 51
Coherent Light has a reputation beyond reputeCoherent Light has a reputation beyond reputeCoherent Light has a reputation beyond reputeCoherent Light has a reputation beyond reputeCoherent Light has a reputation beyond reputeCoherent Light has a reputation beyond reputeCoherent Light has a reputation beyond reputeCoherent Light has a reputation beyond reputeCoherent Light has a reputation beyond reputeCoherent Light has a reputation beyond reputeCoherent Light has a reputation beyond repute
Default Re: 445nm LED'd?

If You have the Diode pressed into the AixiZ module correctly you should have more than enough Thermal transfer, but if the Diode is not in correct using a bit of thermal grease before it was inserted would have helped.
__________________
Coherent::
Coherent Light is offline   Reply With Quote
Old 02-08-2011, 02:03 AM #9
Junior Member
 
Join Date: Jan 2011
Location: Windsor, Ontario, Canada
Posts: 12
Rep Power: 0
WastedEmu is on a distinguished road
WastedEmu WastedEmu is offline
Junior Member
 
Join Date: Jan 2011
Location: Windsor, Ontario, Canada
Posts: 12
Rep Power: 0
WastedEmu is on a distinguished road
Default Re: 445nm LED'd?

i know i do have the diode pressed into the module correctly, i'll post a reply tomorrow after i get another LM317 just in case the one i have killed itself
WastedEmu is offline   Reply With Quote
Old 02-08-2011, 07:36 PM #10
Junior Member
 
Join Date: Jan 2011
Location: Windsor, Ontario, Canada
Posts: 12
Rep Power: 0
WastedEmu is on a distinguished road
WastedEmu WastedEmu is offline
Junior Member
 
Join Date: Jan 2011
Location: Windsor, Ontario, Canada
Posts: 12
Rep Power: 0
WastedEmu is on a distinguished road
Default Re: 445nm LED'd?

alright, so today i got a new LM317, and attached a heat sink to it, i first started off by putting a phr-803t LD on it, and was able to light a match, with a 10 ohm resistor on it.

after that i disconnected the phr-803t LD and hooked the 445nm diode up to the circuit and was not getting nearly as much power as the phr-803t was getting, so i replaced the 10ohm resistor with a 1ohm, and there didn't seem to be a power increase in the beam. so from this i think i can confirm i somehow killed the 445nm LD
WastedEmu is offline   Reply With Quote
Old 02-08-2011, 07:43 PM #11
daguin's Avatar
Super Moderator
 
Join Date: Mar 2008
Location: Sunny Southern California
Posts: 16,636
Rep Power: 1432
daguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond repute
daguin daguin is offline
Super Moderator
daguin's Avatar
 
Join Date: Mar 2008
Location: Sunny Southern California
Posts: 16,636
Rep Power: 1432
daguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond repute
Default Re: 445nm LED'd?

You have a "zombie."

-- cross referenced for others

445nm Diode - LEDed?


Peace,
dave
__________________
How To Get Along In and Be Accepted in the Forum

If you got some value out of reading this forum, how about donating $2 to keep it going?
Click Here to donate

Love all, trust a few, do wrong to none.
-William Shakespeare
daguin is offline   Reply With Quote
Old 02-08-2011, 07:53 PM #12
Junior Member
 
Join Date: Jan 2011
Location: Windsor, Ontario, Canada
Posts: 12
Rep Power: 0
WastedEmu is on a distinguished road
WastedEmu WastedEmu is offline
Junior Member
 
Join Date: Jan 2011
Location: Windsor, Ontario, Canada
Posts: 12
Rep Power: 0
WastedEmu is on a distinguished road
Default Re: 445nm LED'd?

Quote:
Originally Posted by daguin View Post
You have a "zombie."

-- cross referenced for others

445nm Diode - LEDed?


Peace,
dave
thanks for the reply

but do you know how this could have happened? I know i never left the soldering iron on the diode for too long, and i also don't have a capacitor in my circuit, i've never hooked it up backwards, or hooked it up to the circuit when it was already powered... I just want to make sure I don't waste another diode lol. and it is for a school project so I can't keep waiting for shipping time in between diodes

thanks
WastedEmu is offline   Reply With Quote
Old 02-08-2011, 08:16 PM #13
daguin's Avatar
Super Moderator
 
Join Date: Mar 2008
Location: Sunny Southern California
Posts: 16,636
Rep Power: 1432
daguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond repute
daguin daguin is offline
Super Moderator
daguin's Avatar
 
Join Date: Mar 2008
Location: Sunny Southern California
Posts: 16,636
Rep Power: 1432
daguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond repute
Default Re: 445nm LED'd?

Quote:
Originally Posted by WastedEmu View Post
thanks for the reply

but do you know how this could have happened? I know i never left the soldering iron on the diode for too long, and i also don't have a capacitor in my circuit, i've never hooked it up backwards, or hooked it up to the circuit when it was already powered... I just want to make sure I don't waste another diode lol. and it is for a school project so I can't keep waiting for shipping time in between diodes

thanks
As I stated in the other thread, we are not sure what causes this (heat and ESD are suspects). There have been VERY few of them show up. Compared to reds and violets, these diodes are pretty tough.

It may even be original defect that just takes a bit to manifest. I've had one customer that had a diode turn zombie in a short time and I had one that was slowly degrading over time (that I replaced before it got to the zombie stage). Out of >600 diodes, that is a pretty good record.

However, despite the nice track record of these diodes, we ARE pushing them well above where they run in the projector. We are going to lose a few.

Peace,
dave
__________________
How To Get Along In and Be Accepted in the Forum

If you got some value out of reading this forum, how about donating $2 to keep it going?
Click Here to donate

Love all, trust a few, do wrong to none.
-William Shakespeare
daguin is offline   Reply With Quote
Old 02-08-2011, 08:25 PM #14
Junior Member
 
Join Date: Jan 2011
Location: Windsor, Ontario, Canada
Posts: 12
Rep Power: 0
WastedEmu is on a distinguished road
WastedEmu WastedEmu is offline
Junior Member
 
Join Date: Jan 2011
Location: Windsor, Ontario, Canada
Posts: 12
Rep Power: 0
WastedEmu is on a distinguished road
Default Re: 445nm LED'd?

alright thanks for the help everyone who replied!

i have just ordered 3 more from DTR lol, so hopefully none of them go on me lol.

and one of my phr-803t LD's died on me in the same circuit at the same time, so i may have had it hooked up wrong, but so far on my other phr-803t LD everything is working smoothly after i rebuilt the circuit.

thanks again everyone!
WastedEmu 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 08:49 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