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 > Drivers, Test-load, Power Supply, & Batteries



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



Reply
 
LinkBack Thread Tools Display Modes
Old 09-26-2011, 06:59 AM #1
ped's Avatar
ped ped is offline
Class 3B Laser
 
Join Date: Nov 2008
Location: Liverpool , UK
Posts: 4,915
Rep Power: 7046
ped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond repute
ped ped is offline
Class 3B Laser
ped's Avatar
 
Join Date: Nov 2008
Location: Liverpool , UK
Posts: 4,915
Rep Power: 7046
ped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond repute
Default Test load for red

Hi guys, to go with these new high power 635's that are available now, what are you using as a test load to set current? does anyone have a diagram?


__________________
@Ped0771

5000mW Coherent/Kenometer

Lazoors:
550mW C6 9mm lens
445nm Blord "Big Boy" 3.36w 9mm lens
445nm Jarob C6 kit (on 3rd diode) 1.9w 9mm lens
Various 532n nm 15mw pens ~ 600mW monster
515nm 34mW Direct Green Diode - LaserBtB
Various 650's - 1mW pens upto 300mW C6's
ped is offline   Reply With Quote







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







Old 09-26-2011, 08:36 AM #2
Flaminpyro's Avatar
Class 4 Laser
 
Join Date: May 2009
Location: West central Oregon
Posts: 5,461
Rep Power: 1768
Flaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond repute
Flaminpyro Flaminpyro is offline
Class 4 Laser
Flaminpyro's Avatar
 
Join Date: May 2009
Location: West central Oregon
Posts: 5,461
Rep Power: 1768
Flaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond repute
Default Re: Test load for red

Some people are using these



and you can get one here> FP Super 3 amp Test Load
__________________
White Fusion Time Machine 445
473nm LRS-0473-KFM-00150-10 158.5mW Lab style
laser used in the making of the latest TRON movie

CNI PGL-III-C-589 125mW
520 in a SH-032
Viasho 532nm 500mW
CNI pen 532nm 84mW
The Violet Pip Squeek 45mW

_____________________________________
LOOKING FOR A HOST WITH PERFECT HEAT SINKING
order your C-88 Cu kit today !

Flaminpyro is offline   Reply With Quote
Old 09-26-2011, 08:49 AM #3
LaZeRz's Avatar
Class 3B Laser
 
Join Date: Feb 2011
Location: Sydney, Australia
Posts: 2,608
Rep Power: 125
LaZeRz has a reputation beyond reputeLaZeRz has a reputation beyond reputeLaZeRz has a reputation beyond reputeLaZeRz has a reputation beyond reputeLaZeRz has a reputation beyond reputeLaZeRz has a reputation beyond reputeLaZeRz has a reputation beyond reputeLaZeRz has a reputation beyond reputeLaZeRz has a reputation beyond reputeLaZeRz has a reputation beyond reputeLaZeRz has a reputation beyond repute
Send a message via MSN to LaZeRz
LaZeRz LaZeRz is offline
Class 3B Laser
LaZeRz's Avatar
 
Join Date: Feb 2011
Location: Sydney, Australia
Posts: 2,608
Rep Power: 125
LaZeRz has a reputation beyond reputeLaZeRz has a reputation beyond reputeLaZeRz has a reputation beyond reputeLaZeRz has a reputation beyond reputeLaZeRz has a reputation beyond reputeLaZeRz has a reputation beyond reputeLaZeRz has a reputation beyond reputeLaZeRz has a reputation beyond reputeLaZeRz has a reputation beyond reputeLaZeRz has a reputation beyond reputeLaZeRz has a reputation beyond repute
Send a message via MSN to LaZeRz
Default Re: Test load for red

i think hes asking for voltage

EDIT: maybe not, but those testloads from FP are awesome
__________________
Stupid Australian Laser Laws.... Damn you customs

How to remove the PCB from protected cells

My Collection Of Beamshots and Laser Related pics!

Feel free to message me for any help/advice

Last edited by LaZeRz; 09-26-2011 at 08:51 AM.
LaZeRz is offline   Reply With Quote
Old 09-26-2011, 08:55 AM #4
Flaminpyro's Avatar
Class 4 Laser
 
Join Date: May 2009
Location: West central Oregon
Posts: 5,461
Rep Power: 1768
Flaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond repute
Flaminpyro Flaminpyro is offline
Class 4 Laser
Flaminpyro's Avatar
 
Join Date: May 2009
Location: West central Oregon
Posts: 5,461
Rep Power: 1768
Flaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond reputeFlaminpyro has a reputation beyond repute
Default Re: Test load for red

Well first he asked what we were using then he asked for diagrams.
So I showed him something he could use
Now why don't you show him a diagram...
__________________
White Fusion Time Machine 445
473nm LRS-0473-KFM-00150-10 158.5mW Lab style
laser used in the making of the latest TRON movie

CNI PGL-III-C-589 125mW
520 in a SH-032
Viasho 532nm 500mW
CNI pen 532nm 84mW
The Violet Pip Squeek 45mW

_____________________________________
LOOKING FOR A HOST WITH PERFECT HEAT SINKING
order your C-88 Cu kit today !

Flaminpyro is offline   Reply With Quote
Old 09-26-2011, 09:08 AM #5
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: Test load for red

I use a selfmade testload, poor-man version.
There are 2x2Ω resistor in parallel to even out the load.



http://www.rog8811.com/laserdriver.htm
__________________
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 !

Last edited by Blord; 09-26-2011 at 09:10 AM.
Blord is offline   Reply With Quote
Old 09-26-2011, 09:18 AM #6
ped's Avatar
ped ped is offline
Class 3B Laser
 
Join Date: Nov 2008
Location: Liverpool , UK
Posts: 4,915
Rep Power: 7046
ped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond repute
ped ped is offline
Class 3B Laser
ped's Avatar
 
Join Date: Nov 2008
Location: Liverpool , UK
Posts: 4,915
Rep Power: 7046
ped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond repute
Default Re: Test load for red

Yeah FP , I just dont have any disposable income at the moment, but your test loads look great. I just wanted to whip something up as iv'e just killed a $70 diode with a faulty flexdrive.
__________________
@Ped0771

5000mW Coherent/Kenometer

Lazoors:
550mW C6 9mm lens
445nm Blord "Big Boy" 3.36w 9mm lens
445nm Jarob C6 kit (on 3rd diode) 1.9w 9mm lens
Various 532n nm 15mw pens ~ 600mW monster
515nm 34mW Direct Green Diode - LaserBtB
Various 650's - 1mW pens upto 300mW C6's
ped is offline   Reply With Quote
Old 09-26-2011, 09:25 AM #7
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: Test load for red

Condolences with the loss of the Mitsubitsi 638nm diode. I use my testload with the diode without problem. Few seconds below 1A should be okay as the testload heat up very fast at high current.
__________________
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 09-26-2011, 10:52 AM #8
ped's Avatar
ped ped is offline
Class 3B Laser
 
Join Date: Nov 2008
Location: Liverpool , UK
Posts: 4,915
Rep Power: 7046
ped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond repute
ped ped is offline
Class 3B Laser
ped's Avatar
 
Join Date: Nov 2008
Location: Liverpool , UK
Posts: 4,915
Rep Power: 7046
ped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond repute
Default Re: Test load for red

Job done! , with a tap for red

__________________
@Ped0771

5000mW Coherent/Kenometer

Lazoors:
550mW C6 9mm lens
445nm Blord "Big Boy" 3.36w 9mm lens
445nm Jarob C6 kit (on 3rd diode) 1.9w 9mm lens
Various 532n nm 15mw pens ~ 600mW monster
515nm 34mW Direct Green Diode - LaserBtB
Various 650's - 1mW pens upto 300mW C6's
ped is offline   Reply With Quote
Old 10-02-2011, 04:12 AM #9
Fiddy's Avatar
Class 3B Laser
 
Join Date: May 2011
Location: Down Under
Posts: 2,747
Rep Power: 311
Fiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond repute
Fiddy Fiddy is offline
Class 3B Laser
Fiddy's Avatar
 
Join Date: May 2011
Location: Down Under
Posts: 2,747
Rep Power: 311
Fiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond repute
Default Re: Test load for red

__________________
405nm - 1,910mW (6)
445nm - 15,895mW (15)
450nm - 370mW (2)
473nm - 110mW (2)
532nm - 1250mW (6)
632.8nm - 2mW (1)
637nm - 5105mW (8)
660nm - 1,850mW (5)
670nm - 600mW (1)
685nm - 40mW (1)
808nm - 2,700mW (3)
RGB - 400mW (1)

In Progress:
405nm - 500mW+ Kryton Groove
445nm - 2,000mW+ C-88
520nm - 50mW Ultrafire RL-118 SS
632.8nm - 0.5mW Mini HeNe

Safety Glasses
2x Eagle Pair OD4+ 190nm-540nm
2x Eagle Pair OD4+ 90-400nm & 580-760nm
OEM Lasers OD 5+ 190-435nm & 730-1085nm

LaserBee 5W Laser Power Meter


>Fiddy's Review/Tutorial/Build Compilation Thread<
>>FS: Custom Glow Rings<<
>>>Plasma Speaker Kits (High Frequency Audio Tesla Coil) reserve yours today!<<<

CajunLasers FTW!
Fiddy is offline   Reply With Quote
Old 10-02-2011, 04:21 AM #10
rhd's Avatar
rhd rhd is offline
Class 4 Laser
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
rhd rhd is offline
Class 4 Laser
rhd's Avatar
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
Default Re: Test load for red

Quote:
Originally Posted by Fiddy View Post
I just want to point out that the normal RED logic fails us with respect to test loads for the 635s.

At 1A, those 1N400X or 1N540X diodes start to drop closer to 1V each. If you're placing 4 of them in series, and also dropping ~1V across the resistor, than you're really talking about something between 4.5 and 5V of simulated Vf.

IIRC, these Mitsubishi reds only have a Vf of something like 3.5, when run at 1A (that's a rough memory though - confirm before taking my word for it)
__________________
CURRENT WAVELENGTHS:
405|441|450|467|473|495|505|520|532|556|PGLRG|589|594|632|638|660


SAFETY & IMPORTANT READING (threads authored and contributed to by various members of LPF):
- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)

rhd is offline   Reply With Quote
Old 10-02-2011, 12:24 PM #11
Benm's Avatar
Class 4 Laser
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,428
Rep Power: 15904
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: 7,428
Rep Power: 15904
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: Test load for red

The 400x series gets to about 1 volt drop at 1 amp indeed, so you only need 3 to simulate the laser diode.

If you want to test your driver for consistency just test it with 2, 3 and 4 diodes as the load, the current should be indentical unless the power supply doesnt have enough voltage when you connect 4.

Make sure to use a 1 watt resistor too - a 0.25/0.4 watt standard version will get pretty toasty dissipating 1 watt.
Benm is online now   Reply With Quote
Old 10-02-2011, 12:34 PM #12
Fiddy's Avatar
Class 3B Laser
 
Join Date: May 2011
Location: Down Under
Posts: 2,747
Rep Power: 311
Fiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond repute
Fiddy Fiddy is offline
Class 3B Laser
Fiddy's Avatar
 
Join Date: May 2011
Location: Down Under
Posts: 2,747
Rep Power: 311
Fiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond reputeFiddy has a reputation beyond repute
Default Re: Test load for red

Quote:
Originally Posted by rhd View Post
I just want to point out that the normal RED logic fails us with respect to test loads for the 635s.

At 1A, those 1N400X or 1N540X diodes start to drop closer to 1V each. If you're placing 4 of them in series, and also dropping ~1V across the resistor, than you're really talking about something between 4.5 and 5V of simulated Vf.

IIRC, these Mitsubishi reds only have a Vf of something like 3.5, when run at 1A (that's a rough memory though - confirm before taking my word for it)
So your better off with 2 or 3 diodes at 1A+?

also they are 1.9 - 2.6Vf

__________________
405nm - 1,910mW (6)
445nm - 15,895mW (15)
450nm - 370mW (2)
473nm - 110mW (2)
532nm - 1250mW (6)
632.8nm - 2mW (1)
637nm - 5105mW (8)
660nm - 1,850mW (5)
670nm - 600mW (1)
685nm - 40mW (1)
808nm - 2,700mW (3)
RGB - 400mW (1)

In Progress:
405nm - 500mW+ Kryton Groove
445nm - 2,000mW+ C-88
520nm - 50mW Ultrafire RL-118 SS
632.8nm - 0.5mW Mini HeNe

Safety Glasses
2x Eagle Pair OD4+ 190nm-540nm
2x Eagle Pair OD4+ 90-400nm & 580-760nm
OEM Lasers OD 5+ 190-435nm & 730-1085nm

LaserBee 5W Laser Power Meter


>Fiddy's Review/Tutorial/Build Compilation Thread<
>>FS: Custom Glow Rings<<
>>>Plasma Speaker Kits (High Frequency Audio Tesla Coil) reserve yours today!<<<

CajunLasers FTW!

Last edited by Fiddy; 10-02-2011 at 12:34 PM.
Fiddy is offline   Reply With Quote
Old 10-02-2011, 12:52 PM #13
Benm's Avatar
Class 4 Laser
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,428
Rep Power: 15904
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: 7,428
Rep Power: 15904
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: Test load for red

The forward voltage will be higher close to 1 amp, there is a graph somewhere in the review of the diode.

But 3 diodes + the 1 ohm resistor would be a better representation than using 4 in any case. I think the idea of 4 diodes comes from the 'textbook' voltage drop of 0.6 volts for a silicion diode. That 0.6 volt figure is for small signal diodes operating at 1 mA or so, not for these rectifier diodes operating at the edge of their specs - 0.9-1.0 volts is more realistic.

Also, the maximum current for a 1n400x diode is 1 amp continous. They will tolerate a bit more, but overheat eventually... especially when mounted in a cluster on a pcb like that.
Benm is online now   Reply With Quote
Old 10-02-2011, 02:48 PM #14
Cyparagon's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,141
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: 9,141
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: Test load for red

At 1A, the 635nm diodes drop about 2.6V. With a test load, 2 diodes should get you about 2.9V (at 1A).
__________________
A problem well stated is a problem half solved.

Last edited by Cyparagon; 10-02-2011 at 02:50 PM.
Cyparagon is online now   Reply With Quote
Old 10-02-2011, 07:12 PM #15
ped's Avatar
ped ped is offline
Class 3B Laser
 
Join Date: Nov 2008
Location: Liverpool , UK
Posts: 4,915
Rep Power: 7046
ped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond repute
ped ped is offline
Class 3B Laser
ped's Avatar
 
Join Date: Nov 2008
Location: Liverpool , UK
Posts: 4,915
Rep Power: 7046
ped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond reputeped has a reputation beyond repute
Default Re: Test load for red

Thanks for the input guys , i'm driving mine at 800mA IIRC and yeah your not wrong, it gets very warm very quickly , but its long enough to tune the driver.
__________________
@Ped0771

5000mW Coherent/Kenometer

Lazoors:
550mW C6 9mm lens
445nm Blord "Big Boy" 3.36w 9mm lens
445nm Jarob C6 kit (on 3rd diode) 1.9w 9mm lens
Various 532n nm 15mw pens ~ 600mW monster
515nm 34mW Direct Green Diode - LaserBtB
Various 650's - 1mW pens upto 300mW C6's
ped is offline   Reply With Quote
Old 10-03-2011, 12:28 AM #16
Benm's Avatar
Class 4 Laser
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,428
Rep Power: 15904
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: 7,428
Rep Power: 15904
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: Test load for red

Don't worry about it too much, these components can endure pretty high temperatures. As long as the diodes and resistors stay below boiling they will not be damaged. You could always try the 'wet finger test' to see if it sizzles when you touch it, though i will not be responsible for any burns
Benm is online now   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 02:42 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