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 04-19-2011, 10:02 AM #1
itsmei's Avatar
Class 1M Laser
 
Join Date: Dec 2009
Location: England
Posts: 151
Rep Power: 8
itsmei is on a distinguished road
itsmei itsmei is offline
Class 1M Laser
itsmei's Avatar
 
Join Date: Dec 2009
Location: England
Posts: 151
Rep Power: 8
itsmei is on a distinguished road
Default A140 Diode ~8V, on LM317 Driver?

I am building a A140 laser with a DIY LM317 driver. I am using 2x 18650 batteries so when fully charged it is 8V+. Is this enough voltage? I am running this diode to 1.5A but is this enough voltage?

It would be a HUGE pain if it was not the required voltage and i have done the set up..

I just need your help

Thanks


__________________
I am currently new to lasers, i have:

LPC 815 DIY 280mW 650nm Click me
2x DIY Red 5mW 650nm
Small 1mW red 650nm
DIY 240mW pulsed red 650nm
DIY Green 5mW 532nm

I am going to be building a 1.5W 445nm laser in a few months. I am also building a 120mW green 532nm.



Click me to Donate to me please Everything helps for me to save and review more lasers
itsmei is offline   Reply With Quote







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







Old 04-19-2011, 07:10 PM #2
itsmei's Avatar
Class 1M Laser
 
Join Date: Dec 2009
Location: England
Posts: 151
Rep Power: 8
itsmei is on a distinguished road
itsmei itsmei is offline
Class 1M Laser
itsmei's Avatar
 
Join Date: Dec 2009
Location: England
Posts: 151
Rep Power: 8
itsmei is on a distinguished road
Default Re: A140 Diode ~8V, on LM317 Driver?

Bump :d
__________________
I am currently new to lasers, i have:

LPC 815 DIY 280mW 650nm Click me
2x DIY Red 5mW 650nm
Small 1mW red 650nm
DIY 240mW pulsed red 650nm
DIY Green 5mW 532nm

I am going to be building a 1.5W 445nm laser in a few months. I am also building a 120mW green 532nm.



Click me to Donate to me please Everything helps for me to save and review more lasers
itsmei is offline   Reply With Quote
Old 04-19-2011, 07:15 PM #3
chipdouglas's Avatar
Class 3B Laser
 
Join Date: Dec 2008
Location: Riverside, California
Posts: 4,011
Rep Power: 347
chipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond repute
Send a message via Yahoo to chipdouglas
chipdouglas chipdouglas is offline
Class 3B Laser
chipdouglas's Avatar
 
Join Date: Dec 2008
Location: Riverside, California
Posts: 4,011
Rep Power: 347
chipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond repute
Send a message via Yahoo to chipdouglas
Default Re: A140 Diode ~8V, on LM317 Driver?

that is plenty of voltage. the diode only needs like 4.5 and the driver needs like 2.5. 2 18650s is a good choice for this set up.


michael.
__________________
IN A CONSTANT STATE OF PICNIC

I AM THE STATUS QUO

ARE YOU A NEW MEMBER, OR EVEN MORE, ARE YOU NEW TO ONLINE FORUMS... READ THIS
LASER POINTER FORUM ETIQUETTE


for pot modding facts click below

http://laserpointerforums.com/f51/pot-modding-faqs-40510.html
chipdouglas is offline   Reply With Quote
Old 04-20-2011, 08:15 AM #4
itsmei's Avatar
Class 1M Laser
 
Join Date: Dec 2009
Location: England
Posts: 151
Rep Power: 8
itsmei is on a distinguished road
itsmei itsmei is offline
Class 1M Laser
itsmei's Avatar
 
Join Date: Dec 2009
Location: England
Posts: 151
Rep Power: 8
itsmei is on a distinguished road
Default Re: A140 Diode ~8V, on LM317 Driver?

Yes, that what i thought but i have had lots of people disagreeing with that statement. Can anyone else just say yes or no? Is the voltage find?
__________________
I am currently new to lasers, i have:

LPC 815 DIY 280mW 650nm Click me
2x DIY Red 5mW 650nm
Small 1mW red 650nm
DIY 240mW pulsed red 650nm
DIY Green 5mW 532nm

I am going to be building a 1.5W 445nm laser in a few months. I am also building a 120mW green 532nm.



Click me to Donate to me please Everything helps for me to save and review more lasers
itsmei is offline   Reply With Quote
Old 04-20-2011, 06:56 PM #5
itsmei's Avatar
Class 1M Laser
 
Join Date: Dec 2009
Location: England
Posts: 151
Rep Power: 8
itsmei is on a distinguished road
itsmei itsmei is offline
Class 1M Laser
itsmei's Avatar
 
Join Date: Dec 2009
Location: England
Posts: 151
Rep Power: 8
itsmei is on a distinguished road
Default Re: A140 Diode ~8V, on LM317 Driver?

Sorry for being so inpatient but i really need the go ahead before i actually put the laser together, i am so excited for building it!. Will ~8V be enough for a LM317 based driver with a A140 running at 1.5A?

Sorry again!

__________________
I am currently new to lasers, i have:

LPC 815 DIY 280mW 650nm Click me
2x DIY Red 5mW 650nm
Small 1mW red 650nm
DIY 240mW pulsed red 650nm
DIY Green 5mW 532nm

I am going to be building a 1.5W 445nm laser in a few months. I am also building a 120mW green 532nm.



Click me to Donate to me please Everything helps for me to save and review more lasers
itsmei is offline   Reply With Quote
Old 04-20-2011, 07:27 PM #6
budabob07's Avatar
Member
 
Join Date: Apr 2011
Posts: 37
Rep Power: 0
budabob07 is on a distinguished road
budabob07 budabob07 is offline
Member
budabob07's Avatar
 
Join Date: Apr 2011
Posts: 37
Rep Power: 0
budabob07 is on a distinguished road
Default Re: A140 Diode ~8V, on LM317 Driver?

LM317 voltage drop: ~3V
A140 voltage drop: ~4.5V
Add them up and you get 7.5 volts. 8 would be fine
budabob07 is offline   Reply With Quote
Old 04-21-2011, 07:26 AM #7
itsmei's Avatar
Class 1M Laser
 
Join Date: Dec 2009
Location: England
Posts: 151
Rep Power: 8
itsmei is on a distinguished road
itsmei itsmei is offline
Class 1M Laser
itsmei's Avatar
 
Join Date: Dec 2009
Location: England
Posts: 151
Rep Power: 8
itsmei is on a distinguished road
Default Re: A140 Diode ~8V, on LM317 Driver?

ok thanks a lot
__________________
I am currently new to lasers, i have:

LPC 815 DIY 280mW 650nm Click me
2x DIY Red 5mW 650nm
Small 1mW red 650nm
DIY 240mW pulsed red 650nm
DIY Green 5mW 532nm

I am going to be building a 1.5W 445nm laser in a few months. I am also building a 120mW green 532nm.



Click me to Donate to me please Everything helps for me to save and review more lasers
itsmei is offline   Reply With Quote
Old 04-21-2011, 07:29 AM #8
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: A140 Diode ~8V, on LM317 Driver?

In practice though - at 1.5A, the math notwithstanding, it just doesn't quite work as perfectly as it seems like it should.

1.5A is right at the LM317's limits, and that voltage doesn't leave much wiggle room as the cells sag. I don't think you're going to get much over 1W of optical output
__________________
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 04-21-2011, 09:36 AM #9
Class 3R Laser
 
Join Date: Nov 2010
Location: Portugal
Posts: 2,470
Rep Power: 84
anselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond repute
anselm anselm is offline
Class 3R Laser
 
Join Date: Nov 2010
Location: Portugal
Posts: 2,470
Rep Power: 84
anselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond reputeanselm has a reputation beyond repute
Default Re: A140 Diode ~8V, on LM317 Driver?

It works fine with freshly charged batteries, but not for a long time.
As soon as the batteries start discharging somewhat the drivers output will slowly decline from those initial 1.5Ampere....

The better your batteries are (capacity and internal resistance) the longer they can keep
up those 1.5A....

Besides, be sure to heatsink that LM317 real good, for that much amperage going through...
__________________
I'm away from home and lasers until late July!
Kryton Groove switch workaround
Get your warning label stickers 0.90$ or less, depending on qty
The INDEX to the LPF
Add to it, and spam it from your signature, too!
Beware! Scams a-plenty, don't be a sucker!
___________________________
ATTENTION
This forum is fullfilled mit special electronische equippment. Fingergrabbing and pressing the cnoeppkes from the lasers is
allowed for die experts only! So all the “lefthanders” stay away and do not disturben the brainstorming von here working
intelligencies. Otherwise you will be out thrown and kicked anderswhere! Also: please keep still and only watchen astaunished the blinkenlights.

Last edited by anselm; 04-21-2011 at 09:47 AM.
anselm is offline   Reply With Quote
Old 04-21-2011, 09:36 AM #10
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: A140 Diode ~8V, on LM317 Driver?

why not use a lm1117? it has a lower dropout so it "should" be more stable
__________________
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
LaZeRz is offline   Reply With Quote
Old 04-21-2011, 09:46 AM #11
itsmei's Avatar
Class 1M Laser
 
Join Date: Dec 2009
Location: England
Posts: 151
Rep Power: 8
itsmei is on a distinguished road
itsmei itsmei is offline
Class 1M Laser
itsmei's Avatar
 
Join Date: Dec 2009
Location: England
Posts: 151
Rep Power: 8
itsmei is on a distinguished road
Default Re: A140 Diode ~8V, on LM317 Driver?

How long do you think i could keep 1.5A with 2x 18650 batteries then? I have an inbuilt charger so it won't be hard to charge it.

Thanks
__________________
I am currently new to lasers, i have:

LPC 815 DIY 280mW 650nm Click me
2x DIY Red 5mW 650nm
Small 1mW red 650nm
DIY 240mW pulsed red 650nm
DIY Green 5mW 532nm

I am going to be building a 1.5W 445nm laser in a few months. I am also building a 120mW green 532nm.



Click me to Donate to me please Everything helps for me to save and review more lasers
itsmei is offline   Reply With Quote
Old 04-26-2011, 02:01 AM #12
Class 1M Laser
 
Join Date: Oct 2008
Posts: 150
Rep Power: 10
laserman55 has a spectacular aura aboutlaserman55 has a spectacular aura about
laserman55 laserman55 is offline
Class 1M Laser
 
Join Date: Oct 2008
Posts: 150
Rep Power: 10
laserman55 has a spectacular aura aboutlaserman55 has a spectacular aura about
Default Re: A140 Diode ~8V, on LM317 Driver?

I had a quick question and I didnt feel like it was worth starting a new post:

So i recently purchased an A130 and I am using a LM317 driver running at about 900 ma. So my question is if the diode can share the same heat sink as the LM317t. I know according to the data sheet the tab of the LM317t is connected to the 1.25 adjustable voltage. However the pins used on the diode are not case pins so can they touch????

Thanks,
Keith
__________________
i am a nub lol omg
laserman55 is offline   Reply With Quote
Old 04-26-2011, 02:44 AM #13
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: A140 Diode ~8V, on LM317 Driver?

Nope, because the 317 will short with the battery (-) through the case. In other words, it's not the diode that creates the problem, it's the case charge.

You can heatsink to the main heatsink, but you need to electrically isolate 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 04-26-2011, 02:59 AM #14
Class 1M Laser
 
Join Date: Oct 2008
Posts: 150
Rep Power: 10
laserman55 has a spectacular aura aboutlaserman55 has a spectacular aura about
laserman55 laserman55 is offline
Class 1M Laser
 
Join Date: Oct 2008
Posts: 150
Rep Power: 10
laserman55 has a spectacular aura aboutlaserman55 has a spectacular aura about
Default Re: A140 Diode ~8V, on LM317 Driver?

Alright that is good to know!

Thank you!
__________________
i am a nub lol omg
laserman55 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 09:52 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