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 02-24-2013, 08:21 AM #1
Eye's Avatar
Eye Eye is offline
Junior Member
 
Join Date: Oct 2011
Posts: 7
Rep Power: 0
Eye is just really niceEye is just really niceEye is just really niceEye is just really niceEye is just really nice
Eye Eye is offline
Junior Member
Eye's Avatar
 
Join Date: Oct 2011
Posts: 7
Rep Power: 0
Eye is just really niceEye is just really niceEye is just really niceEye is just really niceEye is just really nice
Default Killed an A-140 and M-140 with Flexmod P3... should I get a new hobby?

So a while ago I purchased one of DTR's 1.75 watt A-140 based lasers pre-assembled to resemble a lab style laser. However I made the foolish mistake of assuming that this meant it could be left running indefinitely (diode was mounted in heatsink and was air cooled) but evedently I was wrong I soon had a 100 mW zombie diode.

I decided I'd try and replace the diode however by this stage while fiddling with the zombie A-140 I'd managed to completely change every pot on the Flexmod P3 to random/unknown values.

Then I built a dummy load to try and get the flexmod back to some reasonable settings... but then I realised I didn't understand the point of the dummy load (how many diodes should you set the jumper to?) and rage quit (mostly due to the 90% humidity / 30 deg C weather here), and so I followed the flexmod manual: hook its output to a DMM to 'directly' measure the output.

Long story short the new shiney $99 M-140 arrives with G-2 Lens and after much paranoia I hook it up to the flexmod at low current output setting and hope it doesn't immediately release a puff of smoke. I manage to get it to lase and I run it up to about 1.5 watts output as measured on a LaserBee 2 which was drawing less than 1500 mA current so I assumed I could push it more, but sure enough I then look over to see my other DMM reading 5.0 v across the diode. After a heart attack (I assume the M-140 shouldn't ever exceed 4.7 V max?) I turn off the power but by then I discover I have made myself yet another zombie (which now puts out a incredible 5 mW or less).

In any case I think if I try another diode again it will be with a different driver: I don't really understand how the output / tuning of this driver works. For example increasing the amps output also increases the voltage... so what if you reach 4.6 volts and the diode is still only putting out 3/4ths its supposed safe maximum (2 W)? Are you supposed to exceed 4.6 V?

I think once I stop being a postgraduate student and 'get a real job' I'll just drop $500+ on some Aussie forum member to make me a portable 2W blue. (Battery power lasers >1mW cannot be imported into my photon-phobic country).

My stupidly big heatsink:
http://i.imgur.com/JUoI3pU.jpg

The terribly soldered but apparently electrically sound dummy load:
http://i.imgur.com/QFVXCpn.jpg

Zombie spot:
http://i.imgur.com/2jOGih4.jpg

Zombie spot:
http://i.imgur.com/D57RX3K.jpg


__________________
300 mW 635 nm w/ battery pack 1 hour run time
150 mW 532 nm labby
1750+ mW 445 nm labby (DEAD)
120 mW 405 nm lab
1 mW+ (untested output) 633nm HeNe
BigSky Er:YAG 2940 nm pulse laser (not assembled)

Last edited by Eye; 02-24-2013 at 08:26 AM.
Eye is offline   Reply With Quote







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







Old 02-24-2013, 08:29 AM #2
Class 1M Laser
 
Join Date: Dec 2012
Location: Geelong, Victoria, Australia
Posts: 182
Rep Power: 6
JollyKillBill has a spectacular aura aboutJollyKillBill has a spectacular aura about
JollyKillBill JollyKillBill is offline
Class 1M Laser
 
Join Date: Dec 2012
Location: Geelong, Victoria, Australia
Posts: 182
Rep Power: 6
JollyKillBill has a spectacular aura aboutJollyKillBill has a spectacular aura about
Default Re: Killed an A-140 and M-140 with Flexmod P3... should I get a new hobby?

Why not just buy a mohgasm linear driver or ben boost mini, pots are not good at all IMO, 1W-2W lasers can be had for ~$100-$200

Have a look at this http://laserpointerforums.com/f39/sa...0-a-78452.html
__________________
http://laserpointerforums.com/donations.htm

We have enough youth, how about a fountain of smart?!

"It is well enough that people of the nation do not understand our banking and monetary system, for if they did, I believe there would be a revolution before tomorrow morning"- Henry Ford

Last edited by JollyKillBill; 02-24-2013 at 08:31 AM.
JollyKillBill is offline   Reply With Quote
Old 02-24-2013, 08:34 AM #3
Eye's Avatar
Eye Eye is offline
Junior Member
 
Join Date: Oct 2011
Posts: 7
Rep Power: 0
Eye is just really niceEye is just really niceEye is just really niceEye is just really niceEye is just really nice
Eye Eye is offline
Junior Member
Eye's Avatar
 
Join Date: Oct 2011
Posts: 7
Rep Power: 0
Eye is just really niceEye is just really niceEye is just really niceEye is just really niceEye is just really nice
Default Re: Killed an A-140 and M-140 with Flexmod P3... should I get a new hobby?

Those are very nice units but they would almost certainly be confiscated by customs as they exceed 1 mW. They have become quite proficient at finding them (presumably by x-ray). Then again at roughly $200 each I could take a chance twice and probably still be better off than I've been with my described failures...
__________________
300 mW 635 nm w/ battery pack 1 hour run time
150 mW 532 nm labby
1750+ mW 445 nm labby (DEAD)
120 mW 405 nm lab
1 mW+ (untested output) 633nm HeNe
BigSky Er:YAG 2940 nm pulse laser (not assembled)
Eye is offline   Reply With Quote
Old 02-24-2013, 08:34 AM #4
Hiemal's Avatar
Class 3R Laser
 
Join Date: Dec 2011
Location: Houston, TX
Posts: 1,449
Rep Power: 311
Hiemal has a reputation beyond reputeHiemal has a reputation beyond reputeHiemal has a reputation beyond reputeHiemal has a reputation beyond reputeHiemal has a reputation beyond reputeHiemal has a reputation beyond reputeHiemal has a reputation beyond reputeHiemal has a reputation beyond reputeHiemal has a reputation beyond reputeHiemal has a reputation beyond reputeHiemal has a reputation beyond repute
Hiemal Hiemal is offline
Class 3R Laser
Hiemal's Avatar
 
Join Date: Dec 2011
Location: Houston, TX
Posts: 1,449
Rep Power: 311
Hiemal has a reputation beyond reputeHiemal has a reputation beyond reputeHiemal has a reputation beyond reputeHiemal has a reputation beyond reputeHiemal has a reputation beyond reputeHiemal has a reputation beyond reputeHiemal has a reputation beyond reputeHiemal has a reputation beyond reputeHiemal has a reputation beyond reputeHiemal has a reputation beyond reputeHiemal has a reputation beyond repute
Default Re: Killed an A-140 and M-140 with Flexmod P3... should I get a new hobby?

There's no limit voltage wise as to how much a diode can handle... That's why we use constant current drivers, as they adjust the voltage for us to get a specific current through it. There is a rough current limit however!

As to what happened to your diodes, well, a number of different things could have happened...

The diode could have been shorted out, and then unshorted resulting in a capacitor hitting it with too much current, causing it to go "poof".

The Flexmod itself could be to blame, however I do not know for certain.

M-140 diodes can handle about 1.5-1.75 amps safely. Over that you start to run into the realm of the uncertain and your diode may blow out or LED after that. That may have been very well what happened to your diode.

As to why your diode might've not given you your 2 watt output, well, all diodes, and I mean all diodes are never the same. Some give more light output per power input, some less. Yours might not have been super efficient, judging from the fact you were using G-2 lens, and putting 1500 mA or so in it.

What I'd suggest you do, is to get a 9 mm 445 nm diode as a replacement for your M-140. They can handle a lot more current and power output so you may have slightly more luck getting one of those to work too. I'd also maybe put the flexmod you have now aside, and try and use a different driver of whatever kind you'd like.

And also, don't get discouraged with it. I've had a few lasers fail on me too, be it due to stupidity, or just, for no apparent reason whatsoever. You just gotta take it slowly, and if you need help, ask away. There are a lot of good posts on here that can help you out with lasers and building them.
__________________
formerly Le Quack


Drivers and Stuff

Superboost Driver (5.5+ amp capability) End all for Boosting!

MicroSized Boost Driver

Low Dropout Linear Driver


Any electronics related questions?

Send me a PM and I'll try my best to answer!

Last edited by Hiemal; 02-24-2013 at 08:37 AM.
Hiemal is offline   Reply With Quote
Old 02-24-2013, 08:39 AM #5
Class 1M Laser
 
Join Date: Dec 2012
Location: Geelong, Victoria, Australia
Posts: 182
Rep Power: 6
JollyKillBill has a spectacular aura aboutJollyKillBill has a spectacular aura about
JollyKillBill JollyKillBill is offline
Class 1M Laser
 
Join Date: Dec 2012
Location: Geelong, Victoria, Australia
Posts: 182
Rep Power: 6
JollyKillBill has a spectacular aura aboutJollyKillBill has a spectacular aura about
Default Re: Killed an A-140 and M-140 with Flexmod P3... should I get a new hobby?

Quote:
Originally Posted by Eye View Post
Those are very nice units but they would almost certainly be confiscated by customs as they exceed 1 mW. They have become quite proficient at finding them (presumably by x-ray). Then again at roughly $200 each I could take a chance twice and probably still be better off than I've been with my described failures...
If you hadn't noticed I live in Australia and I have two of those lasers, all you need to do is post the module and heatsink seperately to the host, which this seller will gladly do, just remember double postage is not free, its an extra ~$15 or so, so its ~$30 for postage to Australia which takes a little over 1 week to arrive.
__________________
http://laserpointerforums.com/donations.htm

We have enough youth, how about a fountain of smart?!

"It is well enough that people of the nation do not understand our banking and monetary system, for if they did, I believe there would be a revolution before tomorrow morning"- Henry Ford
JollyKillBill is offline   Reply With Quote
Old 02-24-2013, 08:47 AM #6
Eye's Avatar
Eye Eye is offline
Junior Member
 
Join Date: Oct 2011
Posts: 7
Rep Power: 0
Eye is just really niceEye is just really niceEye is just really niceEye is just really niceEye is just really nice
Eye Eye is offline
Junior Member
Eye's Avatar
 
Join Date: Oct 2011
Posts: 7
Rep Power: 0
Eye is just really niceEye is just really niceEye is just really niceEye is just really niceEye is just really nice
Default Re: Killed an A-140 and M-140 with Flexmod P3... should I get a new hobby?

Quote:
Originally Posted by Le Quack View Post
There's no limit voltage wise as to how much a diode can handle... That's why we use constant current drivers, as they adjust the voltage for us to get a specific current through it. There is a rough current limit however!
I always assumed that at any given voltage the diode would essentially act almost like a short circuit and try to pull as many amps through itself as it could, and that this was the reason that CC drivers were needed. I find it hard to believe that any semiconducting device can have no voltage limit.
__________________
300 mW 635 nm w/ battery pack 1 hour run time
150 mW 532 nm labby
1750+ mW 445 nm labby (DEAD)
120 mW 405 nm lab
1 mW+ (untested output) 633nm HeNe
BigSky Er:YAG 2940 nm pulse laser (not assembled)
Eye is offline   Reply With Quote
Old 02-24-2013, 01:47 PM #7
offroadfreak8582's Avatar
Class 3R Laser
 
Join Date: Oct 2011
Location: Netherlands
Posts: 2,350
Rep Power: 2266
offroadfreak8582 has a reputation beyond reputeoffroadfreak8582 has a reputation beyond reputeoffroadfreak8582 has a reputation beyond reputeoffroadfreak8582 has a reputation beyond reputeoffroadfreak8582 has a reputation beyond reputeoffroadfreak8582 has a reputation beyond reputeoffroadfreak8582 has a reputation beyond reputeoffroadfreak8582 has a reputation beyond reputeoffroadfreak8582 has a reputation beyond reputeoffroadfreak8582 has a reputation beyond reputeoffroadfreak8582 has a reputation beyond repute
offroadfreak8582 offroadfreak8582 is offline
Class 3R Laser
offroadfreak8582's Avatar
 
Join Date: Oct 2011
Location: Netherlands
Posts: 2,350
Rep Power: 2266
offroadfreak8582 has a reputation beyond reputeoffroadfreak8582 has a reputation beyond reputeoffroadfreak8582 has a reputation beyond reputeoffroadfreak8582 has a reputation beyond reputeoffroadfreak8582 has a reputation beyond reputeoffroadfreak8582 has a reputation beyond reputeoffroadfreak8582 has a reputation beyond reputeoffroadfreak8582 has a reputation beyond reputeoffroadfreak8582 has a reputation beyond reputeoffroadfreak8582 has a reputation beyond reputeoffroadfreak8582 has a reputation beyond repute
Default Re: Killed an A-140 and M-140 with Flexmod P3... should I get a new hobby?

Quote:
Originally Posted by Eye View Post
I always assumed that at any given voltage the diode would essentially act almost like a short circuit and try to pull as many amps through itself as it could, and that this was the reason that CC drivers were needed. I find it hard to believe that any semiconducting device can have no voltage limit.
What le quack said is correct I even had M-140 diodes @ 5.5V it differs per diode and at what current you run them. I killed 5 or more diodes so don't sweat it. And yes you can run your diodes for hours straight in your heatsink only at LOW current.

greetings,,
__________________
!5W ophir meter! Made by me here: HERE

Want to buy the best goggles for 405nM, 445nM AND infrared? !Click here!
Cat sliding tutorial (Due to high demand):!Click here!

Last updated 04-05-2017

Last edited by offroadfreak8582; 02-24-2013 at 02:32 PM.
offroadfreak8582 is offline   Reply With Quote
Old 02-24-2013, 07:41 PM #8
Th3dArKn3o's Avatar
Class 1M Laser
 
Join Date: Dec 2012
Location: Germany Black Forest :)
Posts: 121
Rep Power: 12
Th3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to behold
Th3dArKn3o Th3dArKn3o is offline
Class 1M Laser
Th3dArKn3o's Avatar
 
Join Date: Dec 2012
Location: Germany Black Forest :)
Posts: 121
Rep Power: 12
Th3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to beholdTh3dArKn3o is a splendid one to behold
Default Re: Killed an A-140 and M-140 with Flexmod P3... should I get a new hobby?

Diodes have Internal Resistance and this resistance changes with the temperature of the diode
The Voltage depends on the internal Resistance and the current you can put 7V on an M140 if the current is limited the driver will automatically reduce the voltage to exact the level the diodes needs depending on the internal resistance and the current setting !

I suggest you another driver, test the driver with a dummy load and an DMM, short the output leads of the driver before you connect the diode, make solid soldered connection no clamps and finally take ESD Precautions !

Edit:
And always turn the laser off by shutting the input voltage on the driver down ! and leave the diode connected to the output of the driver that will prevent spikes !

Last edited by Th3dArKn3o; 02-24-2013 at 07:45 PM.
Th3dArKn3o is offline   Reply With Quote
Old 02-25-2013, 01:03 PM #9
RedDart's Avatar
Class 2M Laser
 
Join Date: Oct 2012
Location: QC, Canada
Posts: 617
Rep Power: 54
RedDart has a reputation beyond reputeRedDart has a reputation beyond reputeRedDart has a reputation beyond reputeRedDart has a reputation beyond reputeRedDart has a reputation beyond reputeRedDart has a reputation beyond reputeRedDart has a reputation beyond reputeRedDart has a reputation beyond reputeRedDart has a reputation beyond reputeRedDart has a reputation beyond reputeRedDart has a reputation beyond repute
RedDart RedDart is offline
Class 2M Laser
RedDart's Avatar
 
Join Date: Oct 2012
Location: QC, Canada
Posts: 617
Rep Power: 54
RedDart has a reputation beyond reputeRedDart has a reputation beyond reputeRedDart has a reputation beyond reputeRedDart has a reputation beyond reputeRedDart has a reputation beyond reputeRedDart has a reputation beyond reputeRedDart has a reputation beyond reputeRedDart has a reputation beyond reputeRedDart has a reputation beyond reputeRedDart has a reputation beyond reputeRedDart has a reputation beyond repute
Default Re: Killed an A-140 and M-140 with Flexmod P3... should I get a new hobby?

Nice heatsink! What's the runtime? 15 years? lol
__________________
C6 host with 445nm M140
RedDart is offline   Reply With Quote
Old 02-26-2013, 01:56 AM #10
Cyparagon's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,142
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: 9,142
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: Killed an A-140 and M-140 with Flexmod P3... should I get a new hobby?

Jokes aside, if it doesn't overheat in 15 minutes, it's not going to overheat.
__________________
A problem well stated is a problem half solved.
Cyparagon is online now   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 02:04 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