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 09-10-2012, 08:32 PM #1
RA_pierce's Avatar
Class 3B Laser
 
Join Date: Sep 2007
Location: Southern California
Posts: 3,258
Rep Power: 3873
RA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond repute
RA_pierce RA_pierce is online now
Class 3B Laser
RA_pierce's Avatar
 
Join Date: Sep 2007
Location: Southern California
Posts: 3,258
Rep Power: 3873
RA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond repute
Default M140 Vf @ 1200?

Hey guys. It's been a while.
I have 2 ben-boost drivers here collecting dust.

I want to power an M140 diode with one set at ~1200mA.
I want to use a single 4.2V 18650.
While looking for info on the ben-boost I came across someone reporting an issue when using this driver with a 445nm diode with the driver output V less than the driver input V.

Now my issue is that I can't remember the Vf of the 445nm diodes. Something like approx 4.0V @ 1000mA?
Will this combination damage the driver if the Vout < Vin?
It seems like the most common use of this driver is for 445nm diode... but maybe that's because everyone runs them at 2A these days so Vf is higher?

Does this thread belong in the 445nm diode section or the drivers section?



RA_pierce is online now   Reply With Quote







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







Old 09-10-2012, 08:44 PM #2
jander6442's Avatar
Class 3B Laser
 
Join Date: Jan 2009
Location: Ft Myers Fl
Posts: 3,219
Rep Power: 884
jander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond repute
jander6442 jander6442 is offline
Class 3B Laser
jander6442's Avatar
 
Join Date: Jan 2009
Location: Ft Myers Fl
Posts: 3,219
Rep Power: 884
jander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond repute
Default Re: M140 Vf @ 1200?

That benboost will only stay in regulation about a second at that current I don't care how you sink it.
Your better off getting a foulmist boost unit set at that current. Sorry for that... And hey man I haven't seen you around late.
__________________
"http://laserpointerforums.com/f38/dual-411nm-1335mw-2d-mag-pbs-cube-newport-mounts-89822.html"

http://laserpointerforums.com/f65/titan-s-fist-active-tec-cooled-massive-mag-lite-pic-heavy-87489.html

http://laserpointerforums.com/f40/yellow-lantern-mag-lite-638-520nm-combo-87712.html

http://laserpointerforums.com/f45/520nm-hd-250ma-defiant-extended-copper-sink-86562.html


Got butthurt feelings during a post... IF you're new, read this.
jander6442 is offline   Reply With Quote
Old 09-10-2012, 08:44 PM #3
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: M140 Vf @ 1200?

It will be fine you can go ahead and build it no problems.

At least I've tried it & had no problems... You will need massive heatsinking though for the driver
__________________
FTLasers

Last edited by AnthoT; 09-10-2012 at 08:45 PM.
AnthoT is offline   Reply With Quote
Old 09-10-2012, 08:56 PM #4
RA_pierce's Avatar
Class 3B Laser
 
Join Date: Sep 2007
Location: Southern California
Posts: 3,258
Rep Power: 3873
RA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond repute
RA_pierce RA_pierce is online now
Class 3B Laser
RA_pierce's Avatar
 
Join Date: Sep 2007
Location: Southern California
Posts: 3,258
Rep Power: 3873
RA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond repute
Default Re: M140 Vf @ 1200?

Hm. Two ideas that contradict each other.
Can I get a third opinion?

@jander: yo. I've been busy with school and trying to spend more time practicing my other hobbies... drawing, photography, adventuring...
RA_pierce is online now   Reply With Quote
Old 09-10-2012, 09:30 PM #5
Bionic-Badger's Avatar
Class 4 Laser
 
Join Date: Oct 2007
Location: Oregon, USA
Posts: 5,477
Rep Power: 1792
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 online now
Class 4 Laser
Bionic-Badger's Avatar
 
Join Date: Oct 2007
Location: Oregon, USA
Posts: 5,477
Rep Power: 1792
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: M140 Vf @ 1200?

That current is nearing the claimed maximum that driver can handle (1.25A), so a lot of physical conditions, component quality, and margins of operation may come into play. Maybe consider using two Ben Boosts in parallel instead of a single one running at its maximum capabilities.
__________________
You must spread some Reputation around before giving it to <person> again.
Bionic-Badger is online now   Reply With Quote
Old 09-10-2012, 09:50 PM #6
RA_pierce's Avatar
Class 3B Laser
 
Join Date: Sep 2007
Location: Southern California
Posts: 3,258
Rep Power: 3873
RA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond repute
RA_pierce RA_pierce is online now
Class 3B Laser
RA_pierce's Avatar
 
Join Date: Sep 2007
Location: Southern California
Posts: 3,258
Rep Power: 3873
RA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond repute
Default Re: M140 Vf @ 1200?

Lame. I didn't realize this was the upper limit. IIRC they were offered preset at this and higher currents. I wonder why if it's not going to perform well at this setting.
RA_pierce is online now   Reply With Quote
Old 09-10-2012, 10:19 PM #7
jander6442's Avatar
Class 3B Laser
 
Join Date: Jan 2009
Location: Ft Myers Fl
Posts: 3,219
Rep Power: 884
jander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond repute
jander6442 jander6442 is offline
Class 3B Laser
jander6442's Avatar
 
Join Date: Jan 2009
Location: Ft Myers Fl
Posts: 3,219
Rep Power: 884
jander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond reputejander6442 has a reputation beyond repute
Default Re: M140 Vf @ 1200?

Read up on the open source "benboost" thread it ends in some sorts of desoldering a cap IIRC.
I'be never run them in anything above 945mA due to heat.
__________________
"http://laserpointerforums.com/f38/dual-411nm-1335mw-2d-mag-pbs-cube-newport-mounts-89822.html"

http://laserpointerforums.com/f65/titan-s-fist-active-tec-cooled-massive-mag-lite-pic-heavy-87489.html

http://laserpointerforums.com/f40/yellow-lantern-mag-lite-638-520nm-combo-87712.html

http://laserpointerforums.com/f45/520nm-hd-250ma-defiant-extended-copper-sink-86562.html


Got butthurt feelings during a post... IF you're new, read this.
jander6442 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 09:40 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