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 10-16-2012, 04:20 PM #17
Class 2 Laser
 
Join Date: Sep 2007
Posts: 304
Rep Power: 11
cyclonite will become famous soon enough
cyclonite cyclonite is offline
Class 2 Laser
 
Join Date: Sep 2007
Posts: 304
Rep Power: 11
cyclonite will become famous soon enough
Default Re: opinion on this LM2596 based driver

Hi DTR and Bionic-Badger,

Thanks. I just want to add 2 things:

1) DTR, I did not heatsink this. Reason being, this was a free diode that was of the same Ampere and Voltage specs as the one that I will be using. The housing module has not arrived hence I could not press it into it to heatsink. I just wanted to use this as a 'dummy load' to calibrate the driver. Thinking back, it was slightly brighter at the start and now it's dimmer. Might have killed it.

2) Bionic-Badger, I was too tired/sleepy to elaborate on my dummy load set-up. Yes I'm aware that the 1N4001 diodes are rated at 1A. What I actually have here is 6 of those diodes. To I've got 2 in parallel to increase the rating to 2A and then I hook 3 of these sets up. The other reason I decided to do this is because I found that these diodes have different voltage drops across them hence by running 2 in parallel I get to average out the voltage drop.

So would the current/voltage draw change when a diode dies and becomes an LED?

Thanks


cyclonite is offline   Reply With Quote







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







Old 10-16-2012, 05:19 PM #18
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: opinion on this LM2596 based driver

Short of ESD-death, when a laser diode "LEDs" the facets on its lasing medium are destroyed, so it'll still operate--electrically--the same, but just can't lase. That's why those LEDed laser diodes make fine--if not expensive--dummy loads.

As for your dummy load setup, the best thing to do with your current setup is to just measure the actual voltage drop across your diodes. Then you'll get an idea of what the driver is dealing with.
__________________
You must spread some Reputation around before giving it to <person> again.
Bionic-Badger is online now   Reply With Quote
Old 10-16-2012, 07:10 PM #19
Class 2 Laser
 
Join Date: Sep 2007
Posts: 304
Rep Power: 11
cyclonite will become famous soon enough
cyclonite cyclonite is offline
Class 2 Laser
 
Join Date: Sep 2007
Posts: 304
Rep Power: 11
cyclonite will become famous soon enough
Default Re: opinion on this LM2596 based driver

gotcha. I'll measure the voltage across the LED and the 1N4001 diodes tonight and report. Cheers.
cyclonite is offline   Reply With Quote
Old 10-16-2012, 10:04 PM #20
Class 2 Laser
 
Join Date: Sep 2007
Posts: 304
Rep Power: 11
cyclonite will become famous soon enough
cyclonite cyclonite is offline
Class 2 Laser
 
Join Date: Sep 2007
Posts: 304
Rep Power: 11
cyclonite will become famous soon enough
Default Re: opinion on this LM2596 based driver

Hello Hello experts....

So I've hooked the driver up to my dummy load and to my 100mW diode (now I'm not sure if it's an LED or if it's still alive). Here are my findings:

1) Voltage drop across the Laser Diode is indeed 1.9v - 2.0v the diode's spec = 2.0v - 2.2v.

2) Current flowing through the Laser Diode = 1.1A which is also bang on target.

I'm now very happy that I've calibrated the driver and it's ready for the main primary Laser Diode. I'm now waiting for a drill bit, slide switch, Flaminpyro's diode press and most importantly the diode's house + glass lens to arrive. I've for everything else that I need for the build.

Here is a question. I've taken these 2 photographs with my iPhone 4's rear camera. Would you say that this 100mW diode is still alive or has become an LED? I guess those familiar with IR diodes would know. For comparison I've taken a 3rd picture of the LED on my CD Transport's remote control transmitter to show how dim a normal LED is.

1 more question, the seller has told me that the primary diode which is rated between 1000mW - 1500mW has the same current draw and voltage drop as this free 100mW diode. How is this possible? I don't understand this bit so could someone please elaborate? Thanks.

Thanks.
Attached Thumbnails
opinion on this LM2596 based driver-.jpg   opinion on this LM2596 based driver-b.jpg   opinion on this LM2596 based driver-c.jpg  
cyclonite is offline   Reply With Quote
Old 10-17-2012, 06:41 PM #21
Cyparagon's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,141
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Cyparagon Cyparagon is online now
Class 4 Laser
Cyparagon's Avatar
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,141
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Default Re: opinion on this LM2596 based driver

Running laser diodes without a heat sink works about as well as running a modern CPU without a heat sink, except laser diodes don't have auto-power-down on overheat.

If it wasn't dead before, it's probably dead now.
__________________
A problem well stated is a problem half solved.
Cyparagon is online now   Reply With Quote
Old 10-17-2012, 07:58 PM #22
swkaise's Avatar
Member
 
Join Date: Oct 2012
Location: Illinois
Posts: 38
Rep Power: 0
swkaise is on a distinguished road
swkaise swkaise is offline
Member
swkaise's Avatar
 
Join Date: Oct 2012
Location: Illinois
Posts: 38
Rep Power: 0
swkaise is on a distinguished road
Default Re: opinion on this LM2596 based driver

Quote:
Originally Posted by Cyparagon View Post
Running laser diodes without a heat sink works about as well as running a modern CPU without a heat sink, except laser diodes don't have auto-power-down on overheat.

If it wasn't dead before, it's probably dead now.
They heat up that quickly? Good info!
swkaise is offline   Reply With Quote
Old 10-17-2012, 08:49 PM #23
Class 2 Laser
 
Join Date: Sep 2007
Posts: 304
Rep Power: 11
cyclonite will become famous soon enough
cyclonite cyclonite is offline
Class 2 Laser
 
Join Date: Sep 2007
Posts: 304
Rep Power: 11
cyclonite will become famous soon enough
Default Re: opinion on this LM2596 based driver

Beam pattern from my diode w/o lens. LEDed or still good?? Thx!
Attached Thumbnails
opinion on this LM2596 based driver-.jpg   opinion on this LM2596 based driver-b.jpg  
cyclonite is offline   Reply With Quote
Old 10-17-2012, 09:02 PM #24
ApexProxy's Avatar
Class 3R Laser
 
Join Date: Jul 2012
Location: Las Vegas, Nevada
Posts: 1,772
Rep Power: 92
ApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond repute
ApexProxy ApexProxy is offline
Class 3R Laser
ApexProxy's Avatar
 
Join Date: Jul 2012
Location: Las Vegas, Nevada
Posts: 1,772
Rep Power: 92
ApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond repute
Default Re: opinion on this LM2596 based driver

It doesn't look fully dead but it looks damaged. It really is a very bad idea to run a diode without any heatsink....
__________________
Tutorial: Pressing a Diode
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
NEW 1.5-2.5W 445nm Blue Ice/Black Ice/Flash Freeze Lasers FREE US Shipping!
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Some of the collection:
-405nm -811mW - S06J@490mA - Aurora C6
-445nm -3.04W - 9mm@2.2A - Ultrafire L2
-445nm -2.95W - M140@2A - "Hyperion" Black Ice/Flash Freeze hybrid
-445nm -2.2W - M140@1.8A - Aurora C6
-445nm -1.93W - M140@1.8A - Blue Ice by yobresal
-450nm -1.67W - PLTB450@1.7A - Survival Laser S4
-488nm ~25mW - "The Beast" JDSU Argon Ion
-520nm -132mW - PL520@390mA - Minisabre V2
-532nm -374mW - Skylaser HL532 300mW
-532nm -90mW - SD-303
-532nm -110mW - 50mW FastTech Module - DTR Skyray
-543nm ~.3mW Melles Griot HeNe
-638nm -1.3W - ML501P73@1.5A - Survival Laser S4
-638nm -1W - ML501P73@1.4A - Ultrafire WF-602C
-650nm -324mW - 3.8mm OpenCan@428mA - C6
-650nm -128mW - 3.8mm OpenCan@200mA - C6 (Mohgasm JAD)
Laserbee II 3.2W and 5W Ophir LPM
ApexProxy is offline   Reply With Quote
Old 10-17-2012, 09:30 PM #25
Class 2 Laser
 
Join Date: Sep 2007
Posts: 304
Rep Power: 11
cyclonite will become famous soon enough
cyclonite cyclonite is offline
Class 2 Laser
 
Join Date: Sep 2007
Posts: 304
Rep Power: 11
cyclonite will become famous soon enough
Default Re: opinion on this LM2596 based driver

ok thanks. yeah thankfully I learned this the cheap way as this was a free diode . The main one is rated at < 1500mW but draws the same Amps and Volts as this one. Anyone knows how this is possible? i.e. same power draw but puts out 15x more output?

Thanks.
cyclonite is offline   Reply With Quote
Old 10-18-2012, 08:05 AM #26
ApexProxy's Avatar
Class 3R Laser
 
Join Date: Jul 2012
Location: Las Vegas, Nevada
Posts: 1,772
Rep Power: 92
ApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond repute
ApexProxy ApexProxy is offline
Class 3R Laser
ApexProxy's Avatar
 
Join Date: Jul 2012
Location: Las Vegas, Nevada
Posts: 1,772
Rep Power: 92
ApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond reputeApexProxy has a reputation beyond repute
Default Re: opinion on this LM2596 based driver

Sounds like one of the diodes was overrated or underrated or maybe the specs were off on one of them.
__________________
Tutorial: Pressing a Diode
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
NEW 1.5-2.5W 445nm Blue Ice/Black Ice/Flash Freeze Lasers FREE US Shipping!
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Some of the collection:
-405nm -811mW - S06J@490mA - Aurora C6
-445nm -3.04W - 9mm@2.2A - Ultrafire L2
-445nm -2.95W - M140@2A - "Hyperion" Black Ice/Flash Freeze hybrid
-445nm -2.2W - M140@1.8A - Aurora C6
-445nm -1.93W - M140@1.8A - Blue Ice by yobresal
-450nm -1.67W - PLTB450@1.7A - Survival Laser S4
-488nm ~25mW - "The Beast" JDSU Argon Ion
-520nm -132mW - PL520@390mA - Minisabre V2
-532nm -374mW - Skylaser HL532 300mW
-532nm -90mW - SD-303
-532nm -110mW - 50mW FastTech Module - DTR Skyray
-543nm ~.3mW Melles Griot HeNe
-638nm -1.3W - ML501P73@1.5A - Survival Laser S4
-638nm -1W - ML501P73@1.4A - Ultrafire WF-602C
-650nm -324mW - 3.8mm OpenCan@428mA - C6
-650nm -128mW - 3.8mm OpenCan@200mA - C6 (Mohgasm JAD)
Laserbee II 3.2W and 5W Ophir LPM
ApexProxy is offline   Reply With Quote
Old 10-18-2012, 10:55 AM #27
Class 2 Laser
 
Join Date: Sep 2007
Posts: 304
Rep Power: 11
cyclonite will become famous soon enough
cyclonite cyclonite is offline
Class 2 Laser
 
Join Date: Sep 2007
Posts: 304
Rep Power: 11
cyclonite will become famous soon enough
Default Re: opinion on this LM2596 based driver

I thought so too but I've seen similar spec sheets for both the diodes and the V / A draw are indeed identical :S

Thanks anyway.

Quote:
Originally Posted by ApexProxy View Post
Sounds like one of the diodes was overrated or underrated or maybe the specs were off on one of them.
cyclonite 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 01:53 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