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 02-08-2011, 02:22 PM #1
Junior Member
 
Join Date: Feb 2011
Posts: 20
Rep Power: 0
DeathNoteViewer is on a distinguished road
DeathNoteViewer DeathNoteViewer is offline
Junior Member
 
Join Date: Feb 2011
Posts: 20
Rep Power: 0
DeathNoteViewer is on a distinguished road
Default DDL driver

So i am making my first driver for a phr-803t diode. The schematic says that i need to solder a 10ohm resistor but i doesnt say of what wattage. So i went to my local electronics store and bought a 1/2w one. When i got home i found out that the clerk put a 1ohm one instead of a 10ohm. Money wasn't a matter since these things are dirty cheap, so i started looking in my electronics stash for a resistor of the said value. What i have found was a 10ohm@1/8watt one, but i don't know if it is suitable because of it's wattage. Does anybody know if it is ok?


DeathNoteViewer is offline   Reply With Quote







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







Old 02-08-2011, 02:28 PM #2
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: DDL driver

You can always try it out, check if the resistor heats up much.
If it does get very hot fast, you will need a physically bigger (more watt) one.
0.1Ax5V=1/2W, so a 10 ohm , 1/2W would be the ideal resistor.
__________________
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.
anselm is offline   Reply With Quote
Old 02-08-2011, 02:41 PM #3
Elektrotechniker's Avatar
Class 3B Laser
 
Join Date: Nov 2008
Location: Germany
Posts: 4,240
Rep Power: 409
Elektrotechniker has a reputation beyond reputeElektrotechniker has a reputation beyond reputeElektrotechniker has a reputation beyond reputeElektrotechniker has a reputation beyond reputeElektrotechniker has a reputation beyond reputeElektrotechniker has a reputation beyond reputeElektrotechniker has a reputation beyond reputeElektrotechniker has a reputation beyond reputeElektrotechniker has a reputation beyond reputeElektrotechniker has a reputation beyond reputeElektrotechniker has a reputation beyond repute
Elektrotechniker Elektrotechniker is offline
Class 3B Laser
Elektrotechniker's Avatar
 
Join Date: Nov 2008
Location: Germany
Posts: 4,240
Rep Power: 409
Elektrotechniker has a reputation beyond reputeElektrotechniker has a reputation beyond reputeElektrotechniker has a reputation beyond reputeElektrotechniker has a reputation beyond reputeElektrotechniker has a reputation beyond reputeElektrotechniker has a reputation beyond reputeElektrotechniker has a reputation beyond reputeElektrotechniker has a reputation beyond reputeElektrotechniker has a reputation beyond reputeElektrotechniker has a reputation beyond reputeElektrotechniker has a reputation beyond repute
Default Re: DDL driver

You could try with a 1 ohm resistor you bought. The ranges should be different, but you will most probably me able to get 100 mA. Try it out
Elektrotechniker is offline   Reply With Quote
Old 02-08-2011, 02:41 PM #4
Junior Member
 
Join Date: Feb 2011
Posts: 20
Rep Power: 0
DeathNoteViewer is on a distinguished road
DeathNoteViewer DeathNoteViewer is offline
Junior Member
 
Join Date: Feb 2011
Posts: 20
Rep Power: 0
DeathNoteViewer is on a distinguished road
Default Re: DDL driver

What if i connect the resistor which is 10ohm@1/8w with the other that is 1ohm@1/2w in series?
I mean, the resistance won't change that much, but what about the wattage?
DeathNoteViewer is offline   Reply With Quote
Old 02-08-2011, 02:50 PM #5
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: DDL driver

Yeah put them in series, that's even better, the heat is distributed over both resistors,
so it is less on either one.
Quote:
You could try with a 1 ohm resistor you bought. The ranges should be different, but you will most probably me able to get 100 mA.
Just the 1ohm one would make for 1250mA, way too much for a phr!
__________________
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.
anselm is offline   Reply With Quote
Old 02-08-2011, 03:52 PM #6
Cyparagon's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,144
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: 9,144
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: DDL driver

Quote:
Originally Posted by anselm View Post
0.1Ax5V=1/2W, so a 10 ohm , 1/2W would be the ideal resistor.
I'm not sure where you got those numbers, but Vref is 1.25V.

P=IV and I=V/R, so:
P=V²/R
P=1.25²/10
P≈156mW

1/8W is 125mW, but you can go slightly over on them - especially if the duty cycle is low and/or you don't expect 20,000-hour lifespans.

Quote:
Originally Posted by Silvershot View Post
You could try with a 1 ohm resistor you bought. The ranges should be different, but you will most probably me able to get 100 mA. Try it out
NO! You know better, sir. 1 ohm will yield 1.3A which will kill the phr instantly.

Quote:
Originally Posted by anselm View Post
Yeah put them in series, that's even better, the heat is distributed over both resistors,
so it is less on either one.
Yes, but not equally. According to KCL, the current will be the same in both resistors, but according to Ohm's law, the power dissipated across each will be I²R.

Vref/R=I
1.25V/11≈115mA in both resistors

0.115A²*10Ω ≈ 132mW, while:
0.115A²*1Ω ≈ 13mW

You're going 5% over on one, and 97% under on the other.
__________________
A problem well stated is a problem half solved.
Cyparagon is online now   Reply With Quote
Old 02-08-2011, 04:05 PM #7
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: DDL driver

Thank you for that Cyparagon!
I had figured 5V because that's about the Vf of the PHR.
And 0.1A was roughly the current he wanted to drive the diode with.

I was always wondering why I was getting away with such small resistors in the DDL circuit.
^^This makes makes sense to me now, and I inderstand the lm317 a little bit better.
__________________
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.
anselm is offline   Reply With Quote
Old 02-08-2011, 05:58 PM #8
Junior Member
 
Join Date: Feb 2011
Posts: 20
Rep Power: 0
DeathNoteViewer is on a distinguished road
DeathNoteViewer DeathNoteViewer is offline
Junior Member
 
Join Date: Feb 2011
Posts: 20
Rep Power: 0
DeathNoteViewer is on a distinguished road
Default Re: DDL driver

The diode is now burned, i didn't know that i had to discharge the cap in case i desoldered the diode :/
The 10ohm@1/8w resistor was cool during operation though
So now i am looking for a new diode, and a new module. Any suggestions?
DeathNoteViewer is offline   Reply With Quote
Old 02-08-2011, 06:06 PM #9
Leodahsan's Avatar
Class 3R Laser
 
Join Date: Aug 2010
Location: Rio Grande do Sul, Brazil
Posts: 2,088
Rep Power: 165
Leodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond repute
Leodahsan Leodahsan is offline
Class 3R Laser
Leodahsan's Avatar
 
Join Date: Aug 2010
Location: Rio Grande do Sul, Brazil
Posts: 2,088
Rep Power: 165
Leodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond repute
Default Re: DDL driver

PHR?

for 10 bucks: www.rayfoss.com

MODULE?

405nm/445nm laser module housing w/glasses lens [OL1845-BL] - $10.50 : Welcome to O-Like.com, Your source for laser products (recommended, $10)
or DealExtreme: $3.95 Red Laser Module - Focusable Dot (3.5V~4.5V 16mm 5mW) (aixiz, $4)
both from china. If you want it fast: www.aixiz.net


__________________
Any doubts, feel free to PM ou send me a visitor message! I'll help as I can.

Best regards,
Leonardo
__________________

* Deploying CNC router project soon...

DONATE!
The smallest donation will help, if you like this enormous information resource, just do it.
Leodahsan is offline   Reply With Quote
Old 02-08-2011, 06:09 PM #10
Junior Member
 
Join Date: Feb 2011
Posts: 20
Rep Power: 0
DeathNoteViewer is on a distinguished road
DeathNoteViewer DeathNoteViewer is offline
Junior Member
 
Join Date: Feb 2011
Posts: 20
Rep Power: 0
DeathNoteViewer is on a distinguished road
Default Re: DDL driver

I am not going to buy from o-like again. Using their module made the laser look more like a flashight
DeathNoteViewer is offline   Reply With Quote
Old 02-08-2011, 06:11 PM #11
Leodahsan's Avatar
Class 3R Laser
 
Join Date: Aug 2010
Location: Rio Grande do Sul, Brazil
Posts: 2,088
Rep Power: 165
Leodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond repute
Leodahsan Leodahsan is offline
Class 3R Laser
Leodahsan's Avatar
 
Join Date: Aug 2010
Location: Rio Grande do Sul, Brazil
Posts: 2,088
Rep Power: 165
Leodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond repute
Default Re: DDL driver

@DeathNoteViewer
I prefer a flashlight working, cool laser, than a pen style, overheated, burnt laser.


edit:
1w 445 on o-like: 60 second on 20 off
1w 445 on aixiz: 10 second on ~40 off
(not very precise measurements)
__________________
Any doubts, feel free to PM ou send me a visitor message! I'll help as I can.

Best regards,
Leonardo
__________________

* Deploying CNC router project soon...

DONATE!
The smallest donation will help, if you like this enormous information resource, just do it.
Leodahsan is offline   Reply With Quote
Old 02-08-2011, 06:17 PM #12
Junior Member
 
Join Date: Feb 2011
Posts: 20
Rep Power: 0
DeathNoteViewer is on a distinguished road
DeathNoteViewer DeathNoteViewer is offline
Junior Member
 
Join Date: Feb 2011
Posts: 20
Rep Power: 0
DeathNoteViewer is on a distinguished road
Default Re: DDL driver

Quote:
Originally Posted by Leodahsan View Post
@DeathNoteViewer
I prefer a flashlight working, cool laser, than a pen style, overheated, burnt laser.


edit:
1w 445 on o-like: 60 second on 20 off
1w 445 on aixiz: 10 second on ~40 off
(not very precise measurements)
I don't mean that the host looks like a flashlight. The ray looked like the light of the flashlight. Completly out of focus and uncolliminated.
To conclude, that was the module i was using and i am not satisfied at all
DeathNoteViewer is offline   Reply With Quote
Old 02-08-2011, 06:19 PM #13
Leodahsan's Avatar
Class 3R Laser
 
Join Date: Aug 2010
Location: Rio Grande do Sul, Brazil
Posts: 2,088
Rep Power: 165
Leodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond repute
Leodahsan Leodahsan is offline
Class 3R Laser
Leodahsan's Avatar
 
Join Date: Aug 2010
Location: Rio Grande do Sul, Brazil
Posts: 2,088
Rep Power: 165
Leodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond repute
Default Re: DDL driver

uuh? what the hell?
then you got defective lenses. I use they and they are the bomb man!
I prefer it for canned diode as I can just mess with they and test'em faster, unlike aixiz that needs flamin' tools, which I don't have atm. diode thread lock you know.
__________________
Any doubts, feel free to PM ou send me a visitor message! I'll help as I can.

Best regards,
Leonardo
__________________

* Deploying CNC router project soon...

DONATE!
The smallest donation will help, if you like this enormous information resource, just do it.
Leodahsan is offline   Reply With Quote
Old 02-08-2011, 06:28 PM #14
Junior Member
 
Join Date: Feb 2011
Posts: 20
Rep Power: 0
DeathNoteViewer is on a distinguished road
DeathNoteViewer DeathNoteViewer is offline
Junior Member
 
Join Date: Feb 2011
Posts: 20
Rep Power: 0
DeathNoteViewer is on a distinguished road
Default Re: DDL driver

So do you think that if i ask them, they will give me a new lense?
And by the way did the brass collar went all the way in the threads when you put the diode? Mine was off for like 2-3mm. But when i had no diode in the brass collar fitted perfectly.
DeathNoteViewer is offline   Reply With Quote
Old 02-08-2011, 06:30 PM #15
Leodahsan's Avatar
Class 3R Laser
 
Join Date: Aug 2010
Location: Rio Grande do Sul, Brazil
Posts: 2,088
Rep Power: 165
Leodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond repute
Leodahsan Leodahsan is offline
Class 3R Laser
Leodahsan's Avatar
 
Join Date: Aug 2010
Location: Rio Grande do Sul, Brazil
Posts: 2,088
Rep Power: 165
Leodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond reputeLeodahsan has a reputation beyond repute
Default Re: DDL driver

Well I don't know.. the module himself is good, and lenses aren't that expensive after all. Maybe..

The brass collar went all the way in my module, and the diode got very pressed into the module.
__________________
Any doubts, feel free to PM ou send me a visitor message! I'll help as I can.

Best regards,
Leonardo
__________________

* Deploying CNC router project soon...

DONATE!
The smallest donation will help, if you like this enormous information resource, just do it.
Leodahsan is offline   Reply With Quote
Old 02-08-2011, 06:34 PM #16
Junior Member
 
Join Date: Feb 2011
Posts: 20
Rep Power: 0
DeathNoteViewer is on a distinguished road
DeathNoteViewer DeathNoteViewer is offline
Junior Member
 
Join Date: Feb 2011
Posts: 20
Rep Power: 0
DeathNoteViewer is on a distinguished road
Default Re: DDL driver

I suppose it is defective as you said before. I ll send them an email and ask for refund
DeathNoteViewer 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 06:24 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