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 10-26-2012, 07:37 PM #1
Member
 
Join Date: Mar 2012
Posts: 36
Rep Power: 0
z4ibas is on a distinguished road
z4ibas z4ibas is offline
Member
 
Join Date: Mar 2012
Posts: 36
Rep Power: 0
z4ibas is on a distinguished road
Default Problems with LM317 driver

Hello,

today I built LM317 LD driver. http://www.rog8811.com/LM317%20compo...12663627278806. Problem is that when I turn on, resistors are on 5 Ohms, voltage between LD+ LD- is almost the same like power supply. Power supply ~7.6V (not fully charged). I added test load, Turned POT till LD +- voltage became 2.9V, but current now is only 20mA. Here is something wrong or it's ok? My LD need max 3v and 340mA


z4ibas is offline   Reply With Quote







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







Old 10-27-2012, 02:18 AM #2
Class 4 Laser
 
Join Date: May 2007
Location: Queensland, AU
Posts: 7,549
Rep Power: 1100
Things has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond repute
Things Things is offline
Class 4 Laser
 
Join Date: May 2007
Location: Queensland, AU
Posts: 7,549
Rep Power: 1100
Things has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond repute
Default Re: Problems with LM317 driver

You have the LM317 set up in a current regulation configuration. Adjust the potentiometer until you get 340mA and do not worry about the voltage.
Things is offline   Reply With Quote
Old 10-27-2012, 06:32 AM #3
Member
 
Join Date: Mar 2012
Posts: 36
Rep Power: 0
z4ibas is on a distinguished road
z4ibas z4ibas is offline
Member
 
Join Date: Mar 2012
Posts: 36
Rep Power: 0
z4ibas is on a distinguished road
Default Re: Problems with LM317 driver

Do not worry about voltage? This won't fry my voltage? Because I'm scared of wasting my money again ang burning the LD.
z4ibas is offline   Reply With Quote
Old 10-27-2012, 09:08 AM #4
Class 2 Laser
 
Join Date: Feb 2012
Location: UK
Posts: 330
Rep Power: 80
Multimode has a reputation beyond reputeMultimode has a reputation beyond reputeMultimode has a reputation beyond reputeMultimode has a reputation beyond reputeMultimode has a reputation beyond reputeMultimode has a reputation beyond reputeMultimode has a reputation beyond reputeMultimode has a reputation beyond reputeMultimode has a reputation beyond reputeMultimode has a reputation beyond reputeMultimode has a reputation beyond repute
Multimode Multimode is offline
Class 2 Laser
 
Join Date: Feb 2012
Location: UK
Posts: 330
Rep Power: 80
Multimode has a reputation beyond reputeMultimode has a reputation beyond reputeMultimode has a reputation beyond reputeMultimode has a reputation beyond reputeMultimode has a reputation beyond reputeMultimode has a reputation beyond reputeMultimode has a reputation beyond reputeMultimode has a reputation beyond reputeMultimode has a reputation beyond reputeMultimode has a reputation beyond reputeMultimode has a reputation beyond repute
Default Re: Problems with LM317 driver

The driver is set up as "constant Current" - current is the fixed variable.
The driver will automatically 'adjust' the voltage (as the resistance of the diode changed due to temp) and drive the diode at your desired current.
Ohms law.

ATB
MM
Multimode is offline   Reply With Quote
Old 10-27-2012, 10:41 AM #5
Member
 
Join Date: Mar 2012
Posts: 36
Rep Power: 0
z4ibas is on a distinguished road
z4ibas z4ibas is offline
Member
 
Join Date: Mar 2012
Posts: 36
Rep Power: 0
z4ibas is on a distinguished road
Default Re: Problems with LM317 driver

How do I test if it is working good without LD and test load? I ordered LPC-836 LD, max safe current 340mA. Aixiz module will be enough for heatsinking or not?
z4ibas is offline   Reply With Quote
Old 10-27-2012, 11:29 AM #6
Bionic-Badger's Avatar
Class 4 Laser
 
Join Date: Oct 2007
Location: Oregon, USA
Posts: 5,478
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: 5,478
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: Problems with LM317 driver

Answer #1: You buy or build a test-load and properly measure how much current is going through your driver using a multimeter. You're just asking to have your laser diode fried otherwise. Alternatively, you can measure the current passing through the current regulating on your LM317 driver.

Answer #2: No it is not. Buy or create a real heatsink. I've fried many red laser diodes because I didn't use a heatsink, saw the pretty red laser light, left it on too long, and burned out $20 worth of laser diode in a few seconds.

If you're afraid of burning out your laser diode again, you need to do it right and not take any shortcuts.
__________________
You must spread some Reputation around before giving it to <person> again.
Bionic-Badger is online now   Reply With Quote
Old 10-27-2012, 12:08 PM #7
lasersbee's Avatar
Class 4 Laser
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,707
Rep Power: 40049
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
lasersbee lasersbee is offline
Class 4 Laser
lasersbee's Avatar
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,707
Rep Power: 40049
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
Default Re: Problems with LM317 driver

Quote:
Originally Posted by z4ibas View Post
How do I test if it is working good without LD and test load? I ordered LPC-836 LD, max safe current 340mA. Aixiz module will be enough for heatsinking or not?
If you don't want to buy an endless supply of replacement
Laser Diodes then I would also suggest buying or building
or borrowing a LASER DRIVER TEST LOAD...

The heatsinking has also been answered...


Jerry

You can contact us at any time on our Website: J.BAUER Electronics
__________________

J.BAUER Electronics Home Page

LaserBee Laser Power Meter Products meet your needs
at affordable Prices:
See them all here on LPF

LaserBee Power Meter products ALWAYS in Stock
and ready to ship

Also available on eBay:Check availability here..

Subsidary: Pharma Electronic Solutions


This banner is available to and can be copied/used FREE by any LaserBee owner
lasersbee is offline   Reply With Quote
Old 10-27-2012, 02:05 PM #8
Member
 
Join Date: Mar 2012
Posts: 36
Rep Power: 0
z4ibas is on a distinguished road
z4ibas z4ibas is offline
Member
 
Join Date: Mar 2012
Posts: 36
Rep Power: 0
z4ibas is on a distinguished road
Default Re: Problems with LM317 driver

I have not Aixiz but almost the same module Focusable Laser Module Host 5 6mm Laser Diode Case w H Lens DIY Laser Host 1pcs | eBay . If I put those 4 parts from left, into big heatsink, it will be good?
z4ibas is offline   Reply With Quote
Old 10-28-2012, 12:58 PM #9
lasersbee's Avatar
Class 4 Laser
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,707
Rep Power: 40049
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
lasersbee lasersbee is offline
Class 4 Laser
lasersbee's Avatar
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,707
Rep Power: 40049
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
Default Re: Problems with LM317 driver

Quote:
Originally Posted by z4ibas View Post
I have not Aixiz but almost the same module Focusable Laser Module Host 5 6mm Laser Diode Case w H Lens DIY Laser Host 1pcs | eBay . If I put those 4 parts from left, into big heatsink, it will be good?
Yes...


Jerry

You can contact us at any time on our Website: J.BAUER Electronics
__________________

J.BAUER Electronics Home Page

LaserBee Laser Power Meter Products meet your needs
at affordable Prices:
See them all here on LPF

LaserBee Power Meter products ALWAYS in Stock
and ready to ship

Also available on eBay:Check availability here..

Subsidary: Pharma Electronic Solutions


This banner is available to and can be copied/used FREE by any LaserBee owner
lasersbee 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 08:27 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