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 > Tutorials, Help & Repairs



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



Reply
 
LinkBack Thread Tools Display Modes
Old 03-12-2009, 07:15 PM #97
jayrob's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Northern CA, U.S. Astrophotography! (Some of my Photos)
Posts: 9,851
Rep Power: 3922
jayrob has a reputation beyond reputejayrob has a reputation beyond reputejayrob has a reputation beyond reputejayrob has a reputation beyond reputejayrob has a reputation beyond reputejayrob has a reputation beyond reputejayrob has a reputation beyond reputejayrob has a reputation beyond reputejayrob has a reputation beyond reputejayrob has a reputation beyond reputejayrob has a reputation beyond repute
jayrob jayrob is online now
Class 4 Laser
jayrob's Avatar
 
Join Date: Sep 2007
Location: Northern CA, U.S. Astrophotography! (Some of my Photos)
Posts: 9,851
Rep Power: 3922
jayrob has a reputation beyond reputejayrob has a reputation beyond reputejayrob has a reputation beyond reputejayrob has a reputation beyond reputejayrob has a reputation beyond reputejayrob has a reputation beyond reputejayrob has a reputation beyond reputejayrob has a reputation beyond reputejayrob has a reputation beyond reputejayrob has a reputation beyond reputejayrob has a reputation beyond repute
Default Re: Pioneer 8X Blu-Ray-- BDR-203

Quote:
Originally Posted by daguin

There's not a whole lot else going on with it. *I'm waiting on info to decide on which driver/host combo to use.

Peace,
dave

Ok Dave, it's a done deal...

I am ordering this pot now:
http://search.digikey.com/scripts/Dk...e=3339H-101-ND

And I will build a DDL driver with it and mount it into a 3405 host with a version 1 heatsink and have lead wires on there for you.

This driver will adjust from 12.5mA's to 400mA's. It is a 4 turn pot and will go over 400mA's so watch out for that. It is just recommended for no more that 400mA's in this circuit because it is a 1/2 watt pot.

I will set it at 125mA's, and you can adjust it from there with your test load.

So using 3 X 10440 batteries, you will have plenty of voltage to drive your awesome 8X diode up to 400mA's with this circuit!
Jay

Edit: I'll send the 405-G-1 glass lens mod with the package! 8-)
Lens mod - http://www.laserpointerforums.com/fo...m=1236386077/0


__________________
Personal lasers:
(just a few - too many to list) RPL 425, Sypder III Krypton, RPL 35 (473), GLP-473, GLP-593.5, HeNe 632.8,
Many DIY 445, red, blu-ray, green, 635, and 450 builds...


Looking for a DIY kit?


Take a look at some of my more popular kits linked in color...

* FS: 405-G-1 Glass Lens Mod for Blu-ray! 31% increase in power vs AixiZ acrylic!

* FS: New! 1000 Lumen XML-2 Maglite Modification With Voltage Monitor! - Parts or Complete Light! Must see!

* FS: Polished Stainless Steel Green Kit! Easy assembly in minutes!

* FS: Large Maglite Monster Kits! Side Button Forward Clicky! Custom Head Option! Gnarly...


Click here for a list of my build kits! Projects and tutorials too!

jayrob is online now   Reply With Quote







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







Old 03-12-2009, 07:15 PM #98
Spyderz20x6's Avatar
Class 3B Laser
 
Join Date: Nov 2007
Location: Redmond, WA
Posts: 2,756
Rep Power: 126
Spyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond repute
Send a message via MSN to Spyderz20x6
Spyderz20x6 Spyderz20x6 is offline
Class 3B Laser
Spyderz20x6's Avatar
 
Join Date: Nov 2007
Location: Redmond, WA
Posts: 2,756
Rep Power: 126
Spyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond repute
Send a message via MSN to Spyderz20x6
Default Re: Pioneer 8X Blu-Ray-- BDR-203

Quote:
Originally Posted by daguin
[quote author=Spyderz20x6 link=1236464366/80#94 date=1236883428]
So, it is single mode, right?
In practical application, Yes. (see pullbangdead's post above)

Peace,
dave
[/quote]
Well, we are obviously talking about practical application...
__________________
Spyderz20x6

The Copperhead: 330mW Copper Heatsinked Pocket Pal w/ Meredith Glass Lens and Open Can Diode! See Here
1x 20x 650nm 250mW Burning Mini Laser
1x 20X Open Can 280mW Mini Pocket Burner in 4" Host
1x DX 532nm 10mW Laser
1x 780nm NIR Dorcy Jr. 250mW Laser
KES-400A PS3 405nm Blu-Ray 10mW
PHR-803T Mini 4 inch 405nm Blu-Ray 140mW

Are you a beginner, wanting to build a DIY laser, but do not have a clue about how? Well, then look here!


"its cool dont worrie about it its under controle"
-Jake21, 2009
Spyderz20x6 is offline   Reply With Quote
Old 03-12-2009, 07:20 PM #99
daguin's Avatar
Super Moderator
 
Join Date: Mar 2008
Location: Sunny Southern California
Posts: 16,636
Rep Power: 1432
daguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond repute
daguin daguin is offline
Super Moderator
daguin's Avatar
 
Join Date: Mar 2008
Location: Sunny Southern California
Posts: 16,636
Rep Power: 1432
daguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond repute
Default Re: Pioneer 8X Blu-Ray-- BDR-203

Quote:
Originally Posted by Spyderz20x6
Well, we are obviously talking about practical application...
Fortunately for us, we have a nice mix of laymen AND scientists in the forum

Peace,
dave
__________________
How To Get Along In and Be Accepted in the Forum

If you got some value out of reading this forum, how about donating $2 to keep it going?
Click Here to donate

Love all, trust a few, do wrong to none.
-William Shakespeare
daguin is offline   Reply With Quote
Old 03-12-2009, 07:27 PM #100
charliebruce's Avatar
Class 3R Laser
 
Join Date: Nov 2008
Location: London, UK
Posts: 1,550
Rep Power: 123
charliebruce has a reputation beyond reputecharliebruce has a reputation beyond reputecharliebruce has a reputation beyond reputecharliebruce has a reputation beyond reputecharliebruce has a reputation beyond reputecharliebruce has a reputation beyond reputecharliebruce has a reputation beyond reputecharliebruce has a reputation beyond reputecharliebruce has a reputation beyond reputecharliebruce has a reputation beyond reputecharliebruce has a reputation beyond repute
Send a message via MSN to charliebruce
charliebruce charliebruce is offline
Class 3R Laser
charliebruce's Avatar
 
Join Date: Nov 2008
Location: London, UK
Posts: 1,550
Rep Power: 123
charliebruce has a reputation beyond reputecharliebruce has a reputation beyond reputecharliebruce has a reputation beyond reputecharliebruce has a reputation beyond reputecharliebruce has a reputation beyond reputecharliebruce has a reputation beyond reputecharliebruce has a reputation beyond reputecharliebruce has a reputation beyond reputecharliebruce has a reputation beyond reputecharliebruce has a reputation beyond reputecharliebruce has a reputation beyond repute
Send a message via MSN to charliebruce
Default Re: Pioneer 8X Blu-Ray-- BDR-203

Just to mention, I contacted one of the main Chinese suppliers to see if they can source any of these sleds for us. I will post back on here when I get any more information.
__________________
If I use too many brackets (like this) then just ignore what's inside them...
charliebruce is offline   Reply With Quote
Old 03-13-2009, 01:20 AM #101
Class 2 Laser
 
Join Date: Apr 2008
Location: Tucson, AZ
Posts: 373
Rep Power: 14
climbak is a jewel in the roughclimbak is a jewel in the roughclimbak is a jewel in the roughclimbak is a jewel in the rough
climbak climbak is offline
Class 2 Laser
 
Join Date: Apr 2008
Location: Tucson, AZ
Posts: 373
Rep Power: 14
climbak is a jewel in the roughclimbak is a jewel in the roughclimbak is a jewel in the roughclimbak is a jewel in the rough
Default Re: Pioneer 8X Blu-Ray-- BDR-203

Quote:
Originally Posted by Spyderz20x6
So, it is single mode, right?
I think you are mistaking what type of modes I am talking about. For all intents and purposes this diode is most certainly single TRANSVERSE mode. This is the one you care about with laser pointers. I need single LONGITUDINAL mode for the work I do with the diodes. Diodes are very multi-longitudinal-mode in general. This means it is lasing at a lot of closely spaced wavelengths and the total light output is spread out over roughly a half nanometer. I need lasers that run with one particular wavelength which then has a spread of about 10 picometers or so. I could explain it in more detail, but I don't want to jack the thread more than I already have haha.

Anyway, back to the topic at hand. Build a pointer! We need comparison shots with other BRs! 8-)
climbak is offline   Reply With Quote
Old 03-13-2009, 01:44 AM #102
daguin's Avatar
Super Moderator
 
Join Date: Mar 2008
Location: Sunny Southern California
Posts: 16,636
Rep Power: 1432
daguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond repute
daguin daguin is offline
Super Moderator
daguin's Avatar
 
Join Date: Mar 2008
Location: Sunny Southern California
Posts: 16,636
Rep Power: 1432
daguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond repute
Default Re: Pioneer 8X Blu-Ray-- BDR-203

Laymen AND scientists . . . .

Thanks, Climbak

Peace,
dave
__________________
How To Get Along In and Be Accepted in the Forum

If you got some value out of reading this forum, how about donating $2 to keep it going?
Click Here to donate

Love all, trust a few, do wrong to none.
-William Shakespeare
daguin is offline   Reply With Quote
Old 03-13-2009, 08:02 PM #103
drlava's Avatar
Class 3R Laser
 
Join Date: Mar 2007
Posts: 1,152
Rep Power: 71
drlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond repute
Send a message via AIM to drlava
drlava drlava is offline
Class 3R Laser
drlava's Avatar
 
Join Date: Mar 2007
Posts: 1,152
Rep Power: 71
drlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond repute
Send a message via AIM to drlava
Default Re: Pioneer 8X Blu-Ray-- BDR-203

Wow, just saw this thread through your PM. If this diode does in fact require 7V that would be quite surprising! Typically, no matter what the power, all of the diodes of a given wavelength will have the same operating voltage. The FlexDrive V4 has a maximum output voltage of 6V, so if this diode really takes 7 then it's not going to work. That said, another thing we have noticed in diodes is that their operating voltage increases the more they are overdriven. It's possible that your test diode has a rated operating voltage around 5V but you've managed to overdrive it so much that the drop has increased to 7V. Again, I'd be very suprised if this was the case and it lived! get a multimeter on that sucker. I'd love to do a V-I-P plot with that thing.
Good find, thanks for testing for us Dave.
__________________
My Laser Components Site
drlava is offline   Reply With Quote
Old 03-13-2009, 08:24 PM #104
daguin's Avatar
Super Moderator
 
Join Date: Mar 2008
Location: Sunny Southern California
Posts: 16,636
Rep Power: 1432
daguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond repute
daguin daguin is offline
Super Moderator
daguin's Avatar
 
Join Date: Mar 2008
Location: Sunny Southern California
Posts: 16,636
Rep Power: 1432
daguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond repute
Default Re: Pioneer 8X Blu-Ray-- BDR-203

Quote:
Originally Posted by drlava
Wow, just saw this thread through your PM. *If this diode does in fact require 7V that would be quite surprising! *Typically, no matter what the power, all of the diodes of a given wavelength will have the same operating voltage. *The FlexDrive V4 has a maximum output voltage of 6V, so if this diode really takes 7 then it's not going to work. *That said, another thing we have noticed in diodes is that their operating voltage increases the more they are overdriven. *It's possible that your test diode has a rated operating voltage around 5V but you've managed to overdrive it so much that the drop has increased to 7V. *Again, I'd be very suprised if this was the case and it lived! *get a multimeter on that sucker. *I'd love to do a V-I-P plot with that thing. *
Good find, thanks for testing for us Dave.

Thanks for the response, drlava. All of those are possible. We are blind with these from the beginning. The voltage requirement estimate is simply intuitively derived from the Rkcstr's drop out of regulation at 330mA with 9V supplied. The Rkcstr needs 2.5V. To me that said that the diode must be drawing over 6.5V. It went well over 330mA with 12V supplied, but we have seen "artificial" toughness before from these violet diodes. I'll set one up and see if it lives :-/

Peace,
dave
__________________
How To Get Along In and Be Accepted in the Forum

If you got some value out of reading this forum, how about donating $2 to keep it going?
Click Here to donate

Love all, trust a few, do wrong to none.
-William Shakespeare
daguin is offline   Reply With Quote
Old 03-13-2009, 08:37 PM #105
drlava's Avatar
Class 3R Laser
 
Join Date: Mar 2007
Posts: 1,152
Rep Power: 71
drlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond repute
Send a message via AIM to drlava
drlava drlava is offline
Class 3R Laser
drlava's Avatar
 
Join Date: Mar 2007
Posts: 1,152
Rep Power: 71
drlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond repute
Send a message via AIM to drlava
Default Re: Pioneer 8X Blu-Ray-- BDR-203

Were you using a 9V battery? *I assume not
It's best to measure the diode voltage directly, please try that and we'll know for sure.

Edit: I see you used a bench PSU at 9V
__________________
My Laser Components Site
drlava is offline   Reply With Quote
Old 03-13-2009, 08:44 PM #106
Hemlock_Mike's Avatar
Class 4 Laser
 
Join Date: Jan 2007
Location: North Iowa
Posts: 6,184
Rep Power: 4058
Hemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond repute
Hemlock_Mike Hemlock_Mike is offline
Class 4 Laser
Hemlock_Mike's Avatar
 
Join Date: Jan 2007
Location: North Iowa
Posts: 6,184
Rep Power: 4058
Hemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond repute
Default Re: Pioneer 8X Blu-Ray-- BDR-203

We have seen in the past that Vld is not linear with the current. It is amazing how a diode can draw much more current with a tiny increase in voltage.
For the noobs here --- This is one of the reasons why we drive laser diodes with current sources.

Mike
__________________
It's a dog's life
Hemlock_Mike is offline   Reply With Quote
Old 03-13-2009, 08:54 PM #107
daguin's Avatar
Super Moderator
 
Join Date: Mar 2008
Location: Sunny Southern California
Posts: 16,636
Rep Power: 1432
daguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond repute
daguin daguin is offline
Super Moderator
daguin's Avatar
 
Join Date: Mar 2008
Location: Sunny Southern California
Posts: 16,636
Rep Power: 1432
daguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond repute
Default Re: Pioneer 8X Blu-Ray-- BDR-203

Quote:
Originally Posted by drlava
Were you using a 9V battery? *I assume not
It's best to measure the diode voltage directly, please try that and we'll know for sure.
I was using my 2A bench PSU. I originally set it at 9V, because that had always been enough and because the Rkcstr is a linear driver, I try to limit any excess voltage.

Peace,
dave
__________________
How To Get Along In and Be Accepted in the Forum

If you got some value out of reading this forum, how about donating $2 to keep it going?
Click Here to donate

Love all, trust a few, do wrong to none.
-William Shakespeare
daguin is offline   Reply With Quote
Old 03-13-2009, 09:21 PM #108
drlava's Avatar
Class 3R Laser
 
Join Date: Mar 2007
Posts: 1,152
Rep Power: 71
drlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond repute
Send a message via AIM to drlava
drlava drlava is offline
Class 3R Laser
drlava's Avatar
 
Join Date: Mar 2007
Posts: 1,152
Rep Power: 71
drlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond repute
Send a message via AIM to drlava
Default Re: Pioneer 8X Blu-Ray-- BDR-203

please send me a PM when you are able to do a direct diode voltage recording.
__________________
My Laser Components Site
drlava is offline   Reply With Quote
Old 03-13-2009, 09:54 PM #109
daguin's Avatar
Super Moderator
 
Join Date: Mar 2008
Location: Sunny Southern California
Posts: 16,636
Rep Power: 1432
daguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond repute
daguin daguin is offline
Super Moderator
daguin's Avatar
 
Join Date: Mar 2008
Location: Sunny Southern California
Posts: 16,636
Rep Power: 1432
daguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond repute
Default Re: Pioneer 8X Blu-Ray-- BDR-203

Quote:
Originally Posted by drlava
please send me a PM when you are able to do a direct diode voltage recording.

Remember -- I'm a speech teacher -- How would I do that?

Peace,
dave
__________________
How To Get Along In and Be Accepted in the Forum

If you got some value out of reading this forum, how about donating $2 to keep it going?
Click Here to donate

Love all, trust a few, do wrong to none.
-William Shakespeare
daguin is offline   Reply With Quote
Old 03-13-2009, 10:05 PM #110
pullbangdead's Avatar
Class 3R Laser
 
Join Date: Aug 2007
Posts: 2,045
Rep Power: 238
pullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond repute
pullbangdead pullbangdead is offline
Class 3R Laser
pullbangdead's Avatar
 
Join Date: Aug 2007
Posts: 2,045
Rep Power: 238
pullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond repute
Default Re: Pioneer 8X Blu-Ray-- BDR-203

Quote:
Originally Posted by drlava
Wow, just saw this thread through your PM. *If this diode does in fact require 7V that would be quite surprising! *Typically, no matter what the power, all of the diodes of a given wavelength will have the same operating voltage. *The FlexDrive V4 has a maximum output voltage of 6V, so if this diode really takes 7 then it's not going to work. *That said, another thing we have noticed in diodes is that their operating voltage increases the more they are overdriven. *It's possible that your test diode has a rated operating voltage around 5V but you've managed to overdrive it so much that the drop has increased to 7V. *Again, I'd be very suprised if this was the case and it lived! *get a multimeter on that sucker. *I'd love to do a V-I-P plot with that thing. *
Good find, thanks for testing for us Dave.
If the diodes are well made and built consistently, they'll all be the same, and that will correspond to the light coming out. But high voltage is certainly a common thing with diodes. Especially with new diodes or research efforts, I would not surprised at all if the forward voltage were higher. Once a working diode is made, a lot of work goes into getting threshold down, and getting Vf down. But if they can make it work, make it reliable and long-lived even with voltage a little too high, it'll still work just fine.

For 405nm light, you're looking at a minimum voltage of only around 3 volts, since 405nm corresponds to a photon energy of ~3.06 eV. So you can see, all these diodes have extra voltage built in above and beyond the bare minimum for what light is coming out By contrast, a 650nm photon has an energy of ~1.91 eV. If I remember right, that gives you only about 1 extra volt of built-in voltage in the diode for the red diodes, where you can have more than 2 volts "extra" for violet if the diode takes 5 V total. Improvements in making the diodes will bring the voltage down, but it's not surprising that newer diodes of a different "model" or different stack may have higher built-in voltage.

These things are finicky at every level, it can even be quite difficult just to make the contacts to GaN, especially the p-GaN. Contacts on production diodes should be very good, low resistance, and most likely ohmic. But if the contacts are even just a little off, it's not hard at all to get some extra voltage built into the contacts with a Schottky barrier. The same is true everywhere else in the diode stack, it's not unusual at all to have an extra volt or 2 showing up.
pullbangdead is offline   Reply With Quote
Old 03-13-2009, 10:46 PM #111
drlava's Avatar
Class 3R Laser
 
Join Date: Mar 2007
Posts: 1,152
Rep Power: 71
drlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond repute
Send a message via AIM to drlava
drlava drlava is offline
Class 3R Laser
drlava's Avatar
 
Join Date: Mar 2007
Posts: 1,152
Rep Power: 71
drlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond reputedrlava has a reputation beyond repute
Send a message via AIM to drlava
Default Re: Pioneer 8X Blu-Ray-- BDR-203

Quote:
Originally Posted by daguin
[quote author=drlava link=1236464366/96#107 date=1236979291]please send me a PM when you are able to do a direct diode voltage recording.

Remember -- I'm a speech teacher -- How would I do that?

Peace,
dave[/quote]

connect a multimeter in voltage mode across the diode while you are driving it with 300mA
__________________
My Laser Components Site
drlava is offline   Reply With Quote
Old 03-13-2009, 11:48 PM #112
daguin's Avatar
Super Moderator
 
Join Date: Mar 2008
Location: Sunny Southern California
Posts: 16,636
Rep Power: 1432
daguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond repute
daguin daguin is offline
Super Moderator
daguin's Avatar
 
Join Date: Mar 2008
Location: Sunny Southern California
Posts: 16,636
Rep Power: 1432
daguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond repute
Default Re: Pioneer 8X Blu-Ray-- BDR-203

Quote:
Originally Posted by drlava
connect a multimeter in voltage mode across the diode while you are driving it with 300mA
It's the simple things . . . .

Peace,
dave
__________________
How To Get Along In and Be Accepted in the Forum

If you got some value out of reading this forum, how about donating $2 to keep it going?
Click Here to donate

Love all, trust a few, do wrong to none.
-William Shakespeare
daguin 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


LinkBacks (?)
LinkBack to this Thread: http://laserpointerforums.com/f51/pioneer-8x-blu-ray-bdr-203-a-36790.html
Posted By For Type Date
PCDVD數位科技討論區 - 瀏覽單個文章 - 先鋒 BDR-S09J-X This thread Refback 04-14-2017 02:54 AM
PCDVD數位科技討論區 - 先鋒 BDR-S09J-X This thread Refback 12-18-2015 07:58 PM
先鋒 BDR-S09J-X - PCDVD數位科技討論區 This thread Refback 08-17-2015 02:16 PM
[BDR-203] OCN ??????? This thread Refback 11-04-2012 11:43 PM










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 07:26 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