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 07-16-2011, 06:00 AM #17
zenith828's Avatar
Junior Member
 
Join Date: Jan 2010
Posts: 15
Rep Power: 0
zenith828 is on a distinguished road
zenith828 zenith828 is offline
Junior Member
zenith828's Avatar
 
Join Date: Jan 2010
Posts: 15
Rep Power: 0
zenith828 is on a distinguished road
Default Re: 1+ Watt, Non-aixiz housing, and 405-G-2 lens

Quote:
Originally Posted by jib77 View Post
The "-O" is a pin, the ">-" is the socket. Do you know you need a constant current source not constant voltage?
No I thought V=IR. So the only way to change current would be with the voltage because the resistance is constant (i know it goes up with temperature but i mean you cannot change the resistance). If there is something wrong w/ my logic please explain.


__________________
More photons, more problems.
zenith828 is offline   Reply With Quote







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







Old 07-16-2011, 06:12 AM #18
jib77's Avatar
Class 2M Laser
 
Join Date: Jun 2010
Location: DFW, TX
Posts: 718
Rep Power: 38
jib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond repute
jib77 jib77 is offline
Class 2M Laser
jib77's Avatar
 
Join Date: Jun 2010
Location: DFW, TX
Posts: 718
Rep Power: 38
jib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond repute
Default Re: 1+ Watt, Non-aixiz housing, and 405-G-2 lens

Resistance does change with temp, and you will get thermal runaway in constant voltage mode. That is why we use current sources/sinks for LD and LEDs.
__________________

50mW O-Like New Pocket Greenie OLCGL50

100mW+ PHR/MicroBoost V1/Jayrob Chrome Pocket Mini (140mA)
445nm, Flexdrive V5, Ehgemus 18650 Polished Host (Murdered )
445nm, JibDrive 1.2A, Ehgemus 1x26650 Alien Host
LCC Red 200mW in Custom Ehgemus CR123A Host

FS - My cheap LM1117 driver: >>LINK<<

Cheap PCB prototypes: >>LINK<<


レイセーたちはすごいですよ。
jib77 is offline   Reply With Quote
Old 07-16-2011, 06:25 AM #19
zenith828's Avatar
Junior Member
 
Join Date: Jan 2010
Posts: 15
Rep Power: 0
zenith828 is on a distinguished road
zenith828 zenith828 is offline
Junior Member
zenith828's Avatar
 
Join Date: Jan 2010
Posts: 15
Rep Power: 0
zenith828 is on a distinguished road
Default Re: 1+ Watt, Non-aixiz housing, and 405-G-2 lens

Quote:
Originally Posted by jib77 View Post
Resistance does change with temp, and you will get thermal runaway in constant voltage mode. That is why we use current sources/sinks for LD and LEDs.
Yes I read up on constant current drivers vs. constant voltage drivers and now I understand why I need to use a constant current driver. Thank you very much. You may have just saved my second diode.

What would you recommend I use? And how would I go from the 7.2 volts coming off my batteries? Also how do I know what current to run it at?
__________________
More photons, more problems.

Last edited by zenith828; 07-16-2011 at 06:44 AM.
zenith828 is offline   Reply With Quote
Old 07-16-2011, 06:57 AM #20
jib77's Avatar
Class 2M Laser
 
Join Date: Jun 2010
Location: DFW, TX
Posts: 718
Rep Power: 38
jib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond repute
jib77 jib77 is offline
Class 2M Laser
jib77's Avatar
 
Join Date: Jun 2010
Location: DFW, TX
Posts: 718
Rep Power: 38
jib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond repute
Default Re: 1+ Watt, Non-aixiz housing, and 405-G-2 lens

The simplest is a LD1085 LDO in current mode:



Make sure the caps are ceramic and rated for 10V or more, and that the resistor wattage rating is more than Iout * 1.25 ... for example, for Iout of 1.8A you need a resistor that is rated for more than 2.25W.

There are also some LED buck drivers that can be modified for use but I cant find the thread right now. These are much more efficient since they are switchers.

445's can be run up to 1.8A. The higher you run it, the shorter the life. If you build a LD1085 circuit I would just use a 1Ohm resistor to make it easy ... it will give you 1.25A.
__________________

50mW O-Like New Pocket Greenie OLCGL50

100mW+ PHR/MicroBoost V1/Jayrob Chrome Pocket Mini (140mA)
445nm, Flexdrive V5, Ehgemus 18650 Polished Host (Murdered )
445nm, JibDrive 1.2A, Ehgemus 1x26650 Alien Host
LCC Red 200mW in Custom Ehgemus CR123A Host

FS - My cheap LM1117 driver: >>LINK<<

Cheap PCB prototypes: >>LINK<<


レイセーたちはすごいですよ。

Last edited by jib77; 07-16-2011 at 06:59 AM.
jib77 is offline   Reply With Quote
Old 07-17-2011, 04:19 PM #21
qumefox's Avatar
Class 3B Laser
 
Join Date: Mar 2010
Location: Jackson, TN
Posts: 3,234
Rep Power: 173
qumefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond repute
qumefox qumefox is offline
Class 3B Laser
qumefox's Avatar
 
Join Date: Mar 2010
Location: Jackson, TN
Posts: 3,234
Rep Power: 173
qumefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond reputequmefox has a reputation beyond repute
Default Re: 1+ Watt, Non-aixiz housing, and 405-G-2 lens

You also need to keep in mind that laser diodes have a very shallow IV curve. Meaning it only takes a very slight change in voltage to cause a large change in current.
__________________
Wavelengths in 'The Collection'
685nm, 655nm, 635nm, 589nm, 532nm, 473nm, 445nm, 405nm

Last edited by qumefox; 07-17-2011 at 04:19 PM.
qumefox is offline   Reply With Quote
Old 07-23-2011, 09:10 AM #22
zenith828's Avatar
Junior Member
 
Join Date: Jan 2010
Posts: 15
Rep Power: 0
zenith828 is on a distinguished road
zenith828 zenith828 is offline
Junior Member
zenith828's Avatar
 
Join Date: Jan 2010
Posts: 15
Rep Power: 0
zenith828 is on a distinguished road
Default Re: 1+ Watt, Non-aixiz housing, and 405-G-2 lens

Well I had some success with the current driver. I used a higher current diode (not laser diode) as my RSET. That seemed to work pretty well, although it fluctuated quite a bit with temperature. I got between 1 and 1.3 amps from the current circuit depending on if I put the diode (diode that i used as a resistor) in front of the fan.

The CPU heat sink worked very well and kept the laser housing cool to the touch (I couldn't touch the actual diode).

And when I went from using a power supply to Li-ion batteries I got the same currents and voltages .

Then the sad part, I disassembled all the wiring and hooked it all back up to clean up all the connections and when I tried to start the laser again the laser didn't shine and the amp meter read 7+ amps for a second before I unhooked it. I since then corrected some wiring and the laser will not start. I think i killed it .

But I'm not for sure would hooking up 8-9 volts to a 5V diode not make it light up and kill it instantly? I would imagine it would at least flash, I didn't see anything.

And pics











__________________
More photons, more problems.
zenith828 is offline   Reply With Quote
Old 07-23-2011, 07:30 PM #23
zenith828's Avatar
Junior Member
 
Join Date: Jan 2010
Posts: 15
Rep Power: 0
zenith828 is on a distinguished road
zenith828 zenith828 is offline
Junior Member
zenith828's Avatar
 
Join Date: Jan 2010
Posts: 15
Rep Power: 0
zenith828 is on a distinguished road
Default Re: 1+ Watt, Non-aixiz housing, and 405-G-2 lens

But I'm not for sure would hooking up 8-9 volts to a 5V diode not make it light up and kill it instantly? I would imagine it would at least flash, I didn't see anything.
__________________
More photons, more problems.
zenith828 is offline   Reply With Quote
Old 07-23-2011, 08:10 PM #24
zenith828's Avatar
Junior Member
 
Join Date: Jan 2010
Posts: 15
Rep Power: 0
zenith828 is on a distinguished road
zenith828 zenith828 is offline
Junior Member
zenith828's Avatar
 
Join Date: Jan 2010
Posts: 15
Rep Power: 0
zenith828 is on a distinguished road
Default Re: 1+ Watt, Non-aixiz housing, and 405-G-2 lens

Quote:
Originally Posted by jib77 View Post
The simplest is a LD1085 LDO in current mode:



Make sure the caps are ceramic and rated for 10V or more, and that the resistor wattage rating is more than Iout * 1.25 ... for example, for Iout of 1.8A you need a resistor that is rated for more than 2.25W.

There are also some LED buck drivers that can be modified for use but I cant find the thread right now. These are much more efficient since they are switchers.

445's can be run up to 1.8A. The higher you run it, the shorter the life. If you build a LD1085 circuit I would just use a 1Ohm resistor to make it easy ... it will give you 1.25A.
So if I use a .8ohm 3 Watt resistor and properly heat sink it I should be fine?
__________________
More photons, more problems.
zenith828 is offline   Reply With Quote
Old 07-23-2011, 08:41 PM #25
jib77's Avatar
Class 2M Laser
 
Join Date: Jun 2010
Location: DFW, TX
Posts: 718
Rep Power: 38
jib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond repute
jib77 jib77 is offline
Class 2M Laser
jib77's Avatar
 
Join Date: Jun 2010
Location: DFW, TX
Posts: 718
Rep Power: 38
jib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond reputejib77 has a reputation beyond repute
Default Re: 1+ Watt, Non-aixiz housing, and 405-G-2 lens

Quote:
Originally Posted by zenith828 View Post
So if I use a .8ohm 3 Watt resistor and properly heat sink it I should be fine?
Yes ... that's 1.56A so 2W absolute minimum, 3W is good. Alternatively you can use two 2W 1.6 Ohm resistors in parallel to give you 0.8Ohm 4W.

About measuring with a DMM ... In my experience they usually show an initial spike that is not really there. I get the same thing, but when I hook it up to an o-scope the spike is not there.

You probably killed your diode with ESD, they are extremely sensative. Also if you did not discharge your output cap, it could have had enough charge to zap your diode when you hooked it back up.

What do you mean you used a diode for Rset? Did you mean you used it in place of the LD to set the current? IF so this will not work ... you need a dummy/test load consisting of 4 1N5401 diodes and a 1 Ohm 2W+ resistor in series:

[LD+] ------>|-->|-->|-->|-----/\/\/\/\----[LD-]

Measure the voltage drop across the 1 Ohm and you will get the current indirectly: 1mV == 1mA
__________________

50mW O-Like New Pocket Greenie OLCGL50

100mW+ PHR/MicroBoost V1/Jayrob Chrome Pocket Mini (140mA)
445nm, Flexdrive V5, Ehgemus 18650 Polished Host (Murdered )
445nm, JibDrive 1.2A, Ehgemus 1x26650 Alien Host
LCC Red 200mW in Custom Ehgemus CR123A Host

FS - My cheap LM1117 driver: >>LINK<<

Cheap PCB prototypes: >>LINK<<


レイセーたちはすごいですよ。

Last edited by jib77; 07-23-2011 at 08:52 PM.
jib77 is offline   Reply With Quote
Old 03-23-2012, 10:18 PM #26
zenith828's Avatar
Junior Member
 
Join Date: Jan 2010
Posts: 15
Rep Power: 0
zenith828 is on a distinguished road
zenith828 zenith828 is offline
Junior Member
zenith828's Avatar
 
Join Date: Jan 2010
Posts: 15
Rep Power: 0
zenith828 is on a distinguished road
Default Re: 1+ Watt, Non-aixiz housing, and 405-G-2 lens

Hey guys, it has been a while. I can be frustrating to build a laser so I took a good long break from it and have resonantly finished. The entire build is pretty much the same as before I just bought drivers for it this time because broken diodes were becoming too costly. And as a bonus I added a cheap 5mW laser to the bottom of the handle. And...... pics















__________________
More photons, more problems.

Last edited by zenith828; 03-23-2012 at 10:25 PM.
zenith828 is offline   Reply With Quote
Old 03-23-2012, 10:21 PM #27
Blord's Avatar
Class 4 Laser
 
Join Date: Dec 2007
Location: Belgium
Posts: 5,368
Rep Power: 870
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: 870
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: 1+ Watt, Non-aixiz housing, and 405-G-2 lens

What a great build ! Looks like a UZI-laser.
__________________
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 03-24-2012, 01:27 AM #28
AnthoT's Avatar
Class 3R Laser
 
Join Date: Jan 2012
Location: Canada
Posts: 2,137
Rep Power: 380
AnthoT has a reputation beyond reputeAnthoT has a reputation beyond reputeAnthoT has a reputation beyond reputeAnthoT has a reputation beyond reputeAnthoT has a reputation beyond reputeAnthoT has a reputation beyond reputeAnthoT has a reputation beyond reputeAnthoT has a reputation beyond reputeAnthoT has a reputation beyond reputeAnthoT has a reputation beyond reputeAnthoT has a reputation beyond repute
AnthoT AnthoT is offline
Class 3R Laser
AnthoT's Avatar
 
Join Date: Jan 2012
Location: Canada
Posts: 2,137
Rep Power: 380
AnthoT has a reputation beyond reputeAnthoT has a reputation beyond reputeAnthoT has a reputation beyond reputeAnthoT has a reputation beyond reputeAnthoT has a reputation beyond reputeAnthoT has a reputation beyond reputeAnthoT has a reputation beyond reputeAnthoT has a reputation beyond reputeAnthoT has a reputation beyond reputeAnthoT has a reputation beyond reputeAnthoT has a reputation beyond repute
Default Re: 1+ Watt, Non-aixiz housing, and 405-G-2 lens

Nice build it does look like an UZI
-Anthony
__________________
FTLasers
AnthoT is offline   Reply With Quote
Reply

Tags
445nm 1 watt build





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 09:54 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