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 > Experiments & Modifications



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



Reply
 
LinkBack Thread Tools Display Modes
Old 12-18-2013, 01:05 AM #1
alessnilsen's Avatar
Class 2 Laser
 
Join Date: May 2013
Location: Santa Catarina/Brazil
Posts: 345
Rep Power: 84
alessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond repute
alessnilsen alessnilsen is offline
Class 2 Laser
alessnilsen's Avatar
 
Join Date: May 2013
Location: Santa Catarina/Brazil
Posts: 345
Rep Power: 84
alessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond repute
Default Did my power controll switch killed my LD?

Hi! I finished mounting my powerfull red laser using a GSA-H55N laser diode and a DDL driver set to 415mA, after some play burning plastic, I decided that my laser is too dangerous and need some way to limit the output power.

The circuit I used is this:



For some days it worked like a charm, but someday, when I was burning plastic, suddently my LD died and becomes a LED.

Can my driver killed my diode? It's safe to use?

I think when I switch the driver from low power to high power, the driver sends a power surge, dimming the lifespan of my LD. Maybe a large capacitor helps.

Thanks!


alessnilsen is offline   Reply With Quote







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







Old 12-18-2013, 02:12 AM #2
Cyparagon's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,144
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Cyparagon Cyparagon is online now
Class 4 Laser
Cyparagon's Avatar
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,144
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Default Re: Did my power controll switch killed my LD?

Yes, this will almost certainly kill laser diodes. The contacts are only open for a millisecond or less, but when they are open, there is no voltage on the ADJ pin and the lm317 raises the output voltage to try to increase the voltage on ADJ. You can get a huge spike in 1ms - up to 11V depending on the load. A much larger cap might help, but you would need to switch this while the circuit is off to be safe. You could also switch in a resistor in parallel, so even when the contacts are open there is still a feedback loop.
__________________
A problem well stated is a problem half solved.

Last edited by Cyparagon; 12-18-2013 at 02:15 AM.
Cyparagon is online now   Reply With Quote
Old 12-18-2013, 11:07 AM #3
Down with Umbrella's Avatar
Class 2M Laser
 
Join Date: Aug 2013
Location: Kennebunk, Maine
Posts: 965
Rep Power: 2311
Down with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond repute
Down with Umbrella Down with Umbrella is offline
Class 2M Laser
Down with Umbrella's Avatar
 
Join Date: Aug 2013
Location: Kennebunk, Maine
Posts: 965
Rep Power: 2311
Down with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond reputeDown with Umbrella has a reputation beyond repute
Default Re: Did my power controll switch killed my LD?

I could be mistaken but the drivers I build I put an IN4001 diode in just after the battery and a second capacitor. I get spikes with my velleman DC power supply and lost a diode or two to that :/
Edit: I didn't loose the diode while using the driver but with the dC power supply.
__________________
"Rosemary had an accident." TDWP


Last edited by Down with Umbrella; 12-18-2013 at 11:16 AM. Reason: Correction
Down with Umbrella is offline   Reply With Quote
Old 12-18-2013, 01:06 PM #4
alessnilsen's Avatar
Class 2 Laser
 
Join Date: May 2013
Location: Santa Catarina/Brazil
Posts: 345
Rep Power: 84
alessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond repute
alessnilsen alessnilsen is offline
Class 2 Laser
alessnilsen's Avatar
 
Join Date: May 2013
Location: Santa Catarina/Brazil
Posts: 345
Rep Power: 84
alessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond repute
Default Re: Did my power controll switch killed my LD?

That's sad! You said to put a capacitor in parallel with the driver?

I'll try to rewrite my driver circuit including a resistor in parallel with the switch.

----------

I done this circuit, it's safe?


Last edited by alessnilsen; 12-18-2013 at 02:33 PM.
alessnilsen is offline   Reply With Quote
Old 12-18-2013, 03:48 PM #5
Cyparagon's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,144
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Cyparagon Cyparagon is online now
Class 4 Laser
Cyparagon's Avatar
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,144
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Default Re: Did my power controll switch killed my LD?

Much better. The larger capacitor is not needed for that resistor configuration. It would be better to use a smaller low ESR cap like ceramic.
__________________
A problem well stated is a problem half solved.
Cyparagon is online now   Reply With Quote
Old 12-18-2013, 05:16 PM #6
Leodahsan's Avatar
Class 3R Laser
 
Join Date: Aug 2010
Location: Rio Grande do Sul, Brazil
Posts: 2,088
Rep Power: 165
Leodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond repute
Leodahsan Leodahsan is offline
Class 3R Laser
Leodahsan's Avatar
 
Join Date: Aug 2010
Location: Rio Grande do Sul, Brazil
Posts: 2,088
Rep Power: 165
Leodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond repute
Default Re: Did my power controll switch killed my LD?

If your switch is double poled (like the common 110-220v switches, called "chave H-H" in portuguese), you can even insert a "medium power" setting (add one more resistor).

For the cap parallel to the LD, I always use a 100nF one, soldered close to the LD pins...

Leodahsan is offline   Reply With Quote
Old 12-18-2013, 05:33 PM #7
Cyparagon's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,144
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Cyparagon Cyparagon is online now
Class 4 Laser
Cyparagon's Avatar
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,144
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Default Re: Did my power controll switch killed my LD?

Quote:
Originally Posted by Leodahsan View Post
If your switch is double poled... you can even insert a "medium power" setting
How are you going to get three power settings with two switch positions?
__________________
A problem well stated is a problem half solved.

Last edited by Cyparagon; 12-18-2013 at 05:33 PM.
Cyparagon is online now   Reply With Quote
Old 12-18-2013, 06:01 PM #8
alessnilsen's Avatar
Class 2 Laser
 
Join Date: May 2013
Location: Santa Catarina/Brazil
Posts: 345
Rep Power: 84
alessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond repute
alessnilsen alessnilsen is offline
Class 2 Laser
alessnilsen's Avatar
 
Join Date: May 2013
Location: Santa Catarina/Brazil
Posts: 345
Rep Power: 84
alessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond repute
Default Re: Did my power controll switch killed my LD?

Quote:
If your switch is double poled... you can even insert a "medium power" setting
I think I can't do that, my switch is a "toggle switch", with only two positions.

Quote:
For the cap parallel to the LD, I always use a 100nF one, soldered close to the LD pins...
I always put it close to the driver, away from the LD, the pin that I use to hold the LD don't allow me to put it too close. But I know, close to the LD is better.

-------------

My last LD died! I've assembled the new circuit and tested it, worked well. I hung up and went to have a break, when I came back and turned on the laser again, he died without any explication!

I think my power supply is bad, chinese crap! When I plugged it into the outlet, I heard a big "pop" from the sparks.

Since my last LD died, I can't do anything more.

Last edited by alessnilsen; 12-18-2013 at 07:25 PM.
alessnilsen is offline   Reply With Quote
Old 12-20-2013, 07:44 AM #9
Bionic-Badger's Avatar
Class 4 Laser
 
Join Date: Oct 2007
Location: Oregon, USA
Posts: 5,478
Rep Power: 3157
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: 5,478
Rep Power: 3157
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: Did my power controll switch killed my LD?

Well, the LM317 should protect your laser diode from surges. You could also try putting a reverse-polarity protection diode on your circuit as well, in case there's a bad hook-up or something like that.
__________________
You must spread some Reputation around before giving it to <person> again.
Bionic-Badger is offline   Reply With Quote
Old 12-20-2013, 06:17 PM #10
alessnilsen's Avatar
Class 2 Laser
 
Join Date: May 2013
Location: Santa Catarina/Brazil
Posts: 345
Rep Power: 84
alessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond repute
alessnilsen alessnilsen is offline
Class 2 Laser
alessnilsen's Avatar
 
Join Date: May 2013
Location: Santa Catarina/Brazil
Posts: 345
Rep Power: 84
alessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond repute
Default Re: Did my power controll switch killed my LD?

Quote:
Originally Posted by Bionic-Badger View Post
Well, the LM317 should protect your laser diode from surges. You could also try putting a reverse-polarity protection diode on your circuit as well, in case there's a bad hook-up or something like that.
I think this driver will not work, why? Look carefully, the correct circuit is this:



But now I'm confused, what circuit did I used? I should check!
alessnilsen is offline   Reply With Quote
Old 12-20-2013, 06:30 PM #11
Cyparagon's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,144
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Cyparagon Cyparagon is online now
Class 4 Laser
Cyparagon's Avatar
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,144
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Default Re: Did my power controll switch killed my LD?

AH! I didn't even notice you had the ADJ/OUT pins backwards . I should have caught that.
__________________
A problem well stated is a problem half solved.
Cyparagon is online now   Reply With Quote
Old 12-20-2013, 08:21 PM #12
alessnilsen's Avatar
Class 2 Laser
 
Join Date: May 2013
Location: Santa Catarina/Brazil
Posts: 345
Rep Power: 84
alessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond repute
alessnilsen alessnilsen is offline
Class 2 Laser
alessnilsen's Avatar
 
Join Date: May 2013
Location: Santa Catarina/Brazil
Posts: 345
Rep Power: 84
alessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond repute
Default Re: Did my power controll switch killed my LD?

Hahah. Yes, I spent some time to percept that.

My driver assembly is correct. I'll replace the LM317 with a new one, maybe it helps.
alessnilsen is offline   Reply With Quote
Old 01-18-2014, 01:06 PM #13
alessnilsen's Avatar
Class 2 Laser
 
Join Date: May 2013
Location: Santa Catarina/Brazil
Posts: 345
Rep Power: 84
alessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond repute
alessnilsen alessnilsen is offline
Class 2 Laser
alessnilsen's Avatar
 
Join Date: May 2013
Location: Santa Catarina/Brazil
Posts: 345
Rep Power: 84
alessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond reputealessnilsen has a reputation beyond repute
Default Re: Did my power controll switch killed my LD?

I've got some new LD's, I assembled all and it works very well!

Now I'll try to get a better lens for my new laser.

Thanks for the help!
alessnilsen 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 05:43 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