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 06-03-2008, 01:49 AM #1
Junior Member
 
Join Date: Jan 2008
Posts: 28
Rep Power: 0
MTG18 is on a distinguished road
MTG18 MTG18 is offline
Junior Member
 
Join Date: Jan 2008
Posts: 28
Rep Power: 0
MTG18 is on a distinguished road
Default Driving a PHAZOR Question

Hi, do I need to modify the DDL Driver in any way to get the 350mA for the Phazor Diodes? I have the driver all set up running from two fully-charged rechargeable CR123's. I am using a dummy load (4 1N4001 diodes in series) and am measuring the current (using a 1 ohm resistor) to be around 210mA when the pot is at its least resistance.

Any suggestions? Help?

Thanks!


MTG18 is offline   Reply With Quote







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







Old 06-03-2008, 02:24 AM #2
Class 3R Laser
 
Join Date: Dec 2007
Posts: 1,918
Rep Power: 117
chido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond repute
chido chido is offline
Class 3R Laser
 
Join Date: Dec 2007
Posts: 1,918
Rep Power: 117
chido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond repute
Default Re: Driving a PHAZOR Question

What's the resistance of your resistors? You know, the ones you connect to the pot. I'm almost sure that's what's limiting the current.
chido is offline   Reply With Quote
Old 06-03-2008, 02:33 AM #3
Junior Member
 
Join Date: Jan 2008
Posts: 28
Rep Power: 0
MTG18 is on a distinguished road
MTG18 MTG18 is offline
Junior Member
 
Join Date: Jan 2008
Posts: 28
Rep Power: 0
MTG18 is on a distinguished road
Default Re: Driving a PHAZOR Question

They are 2 10 Ohm resistors in parallel. As shown in the DDL circuit diagrams.
MTG18 is offline   Reply With Quote
Old 06-03-2008, 02:53 AM #4
Class 3R Laser
 
Join Date: Dec 2007
Posts: 1,918
Rep Power: 117
chido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond repute
chido chido is offline
Class 3R Laser
 
Join Date: Dec 2007
Posts: 1,918
Rep Power: 117
chido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond repute
Default Re: Driving a PHAZOR Question

That's limiting the current to 250mA. Use three 10 ohm resistors in parallel, that should limit the current to approx. 378mA. Then you can use the pot to adjust the current to 350mA.
chido is offline   Reply With Quote
Old 06-04-2008, 01:12 AM #5
Junior Member
 
Join Date: Jan 2008
Posts: 28
Rep Power: 0
MTG18 is on a distinguished road
MTG18 MTG18 is offline
Junior Member
 
Join Date: Jan 2008
Posts: 28
Rep Power: 0
MTG18 is on a distinguished road
Default Re: Driving a PHAZOR Question

I added 2 more 10 ohm resistors and it appears the current is limited to about 330mA when the pot is at least resistance. This is right about where I want to run my diode so this is good. When the current is at 330mA the voltage to the LD is about 3.5 Volts. Is this normal? It seems high. So I am measuring 330mA for current to LD and a corresponding 3.5V for voltage to the LD when using the dummy load.

Am I safe to now connect the Phazor LD and drive it with these properties?
MTG18 is offline   Reply With Quote
Old 06-04-2008, 02:35 AM #6
Class 3R Laser
 
Join Date: Dec 2007
Posts: 1,918
Rep Power: 117
chido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond repute
chido chido is offline
Class 3R Laser
 
Join Date: Dec 2007
Posts: 1,918
Rep Power: 117
chido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond repute
Default Re: Driving a PHAZOR Question

No dummy load will ever simulate an LD perfectly. That's why the voltage you're seeing is a little high for a phazor diode.
I've said this a lot of times and I'll say it again, think current. The voltage going to the diode doesn't matter, the diode will take whatever voltage it needs to work, what can kill it is the current, not the voltage.
chido is offline   Reply With Quote
Old 06-04-2008, 08:18 AM #7
Junior Member
 
Join Date: Jan 2008
Posts: 28
Rep Power: 0
MTG18 is on a distinguished road
MTG18 MTG18 is offline
Junior Member
 
Join Date: Jan 2008
Posts: 28
Rep Power: 0
MTG18 is on a distinguished road
Default Re: Driving a PHAZOR Question

So I got it working

It's not as powerful as I was expecting but is quite a burner never-the-less. It seems a little less bright than my green 100mW but perhaps its difficult to compare the two given their different wavelengths/colors/laser type. If it is outputting around 150mW should I be able to see the red beam very well at night? I am giving my batteries a full recharge and hoping that might boost the power more.

Their is also a line across the projected dot when focused. What is this? Can I get rid of it or does it have to do with the diode itself?

Thanks so much chido for all your help! I truly appreciate your patience and expertise.
MTG18 is offline   Reply With Quote
Old 06-04-2008, 09:59 AM #8
Class 3R Laser
 
Join Date: Dec 2007
Posts: 1,918
Rep Power: 117
chido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond repute
chido chido is offline
Class 3R Laser
 
Join Date: Dec 2007
Posts: 1,918
Rep Power: 117
chido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond reputechido has a reputation beyond repute
Default Re: Driving a PHAZOR Question

Green is a lot brighter than red and you will need lots of red to equal the brightness of a green.
At 330mA it should be outputting 200mW+. I can see the beam of my 100mW red laser at night when I point it at the sky. The beam isn't so visible but you are able to see it.
The line is normal, it won't affect anything, it's just there. All DVD burner diodes have it and you can't get rid of it. Here's a pic of mine.

chido 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 11:26 AM.


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