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 08-28-2015, 11:31 AM #1
Dr_Evil's Avatar
Class 3R Laser
 
Join Date: Feb 2008
Location: Hartselle, AL
Posts: 2,305
Rep Power: 1359
Dr_Evil has a reputation beyond reputeDr_Evil has a reputation beyond reputeDr_Evil has a reputation beyond reputeDr_Evil has a reputation beyond reputeDr_Evil has a reputation beyond reputeDr_Evil has a reputation beyond reputeDr_Evil has a reputation beyond reputeDr_Evil has a reputation beyond reputeDr_Evil has a reputation beyond reputeDr_Evil has a reputation beyond reputeDr_Evil has a reputation beyond repute
Dr_Evil Dr_Evil is offline
Class 3R Laser
Dr_Evil's Avatar
 
Join Date: Feb 2008
Location: Hartselle, AL
Posts: 2,305
Rep Power: 1359
Dr_Evil has a reputation beyond reputeDr_Evil has a reputation beyond reputeDr_Evil has a reputation beyond reputeDr_Evil has a reputation beyond reputeDr_Evil has a reputation beyond reputeDr_Evil has a reputation beyond reputeDr_Evil has a reputation beyond reputeDr_Evil has a reputation beyond reputeDr_Evil has a reputation beyond reputeDr_Evil has a reputation beyond reputeDr_Evil has a reputation beyond repute
Default resistance measurement & LD output troubleshooting

I'd like to verify this to make sure I'm correct in my thinking.

Let's say I have two 1.9 ohm resisters in parallel. The actual resistance would be .95. The multimeter should read .95, right? I get ~2.4 ohms across one pair and about 1.8 across the other. See the diagram below to understand.

The 660 in my projector wasn't working. Turns out both diodes went LED so I replaced them. The output still wasn't anywhere near what it should be. The driver is a Lasever LSR-PS-I. I cna't get the output to go over ~350mA. The voltage is ~3.99 with the laser on. The driver is supposed to put out up to 2A though.

The driver Lasever Inc.-LSR-PS-I

This is the way it was set up when I bought this projector so don't blame me. lol

Attached Thumbnails
resistance measurement & LD output troubleshooting-ld.jpg  


__________________
645 to 660 - Z-bolt BTP-8E, jayrob C6 w/LOC
638 - JayRob C6 w/ML520G54
635 - Z-bolt BTE-4S
632.8 - 10mW HeNe
589 - PGL-III-C 80mW(100+ peak/average)
543 - GreeNe
532 - Optotronics RPL-260, Optotronics Pen ~20mW
520 - JayRob C6
514 - Argon SL
488 - Novalux
473 - Lasever LSR473HD-80 - 107mW peak
450 - JayRob C6 w/PL450B
445 - JayRob C6
405 - Old Leadlight that Drlava transformed (33mW), 12x in a JayRob C6 host
Multi - 2214-25MLUP ArIon
Dr_Evil is offline   Reply With Quote







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







Old 08-28-2015, 09:20 PM #2
GatoX's Avatar
Class 1 Laser
 
Join Date: Jun 2014
Location: Spain, Madrid
Posts: 84
Rep Power: 461
GatoX has a reputation beyond reputeGatoX has a reputation beyond reputeGatoX has a reputation beyond reputeGatoX has a reputation beyond reputeGatoX has a reputation beyond reputeGatoX has a reputation beyond reputeGatoX has a reputation beyond reputeGatoX has a reputation beyond reputeGatoX has a reputation beyond reputeGatoX has a reputation beyond reputeGatoX has a reputation beyond repute
GatoX GatoX is online now
Class 1 Laser
GatoX's Avatar
 
Join Date: Jun 2014
Location: Spain, Madrid
Posts: 84
Rep Power: 461
GatoX has a reputation beyond reputeGatoX has a reputation beyond reputeGatoX has a reputation beyond reputeGatoX has a reputation beyond reputeGatoX has a reputation beyond reputeGatoX has a reputation beyond reputeGatoX has a reputation beyond reputeGatoX has a reputation beyond reputeGatoX has a reputation beyond reputeGatoX has a reputation beyond reputeGatoX has a reputation beyond repute
Default Re: resistance measurement & LD output troubleshooting

I'm thinking... You have 4V, right? And your only limitation are 2Amps from driver and the resistor of 0.95ohms. V=I*R -> 4=I*0.95 -> I = 4.21A... If you're searching 350ma, go to amc7135, is the better option
__________________
100mw 405nm pen-style (Broken)
Tritium vial 80mm * 5mm
Tiny host 650nm 250mw lpc 826


"Darkness doesn't exist, shadow is the light that you can't see"

I will apreciate all kind of correction to my posts, please, send me pm if you see bad expresions or grammar issues
GatoX is online now   Reply With Quote
Old 08-29-2015, 11:39 AM #3
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: resistance measurement & LD output troubleshooting

Your resistance measurements are off because of the lead resistance, as well as the contact resistance of your probe/resistor junction. Don't worry about that - it looks close enough.

The issue here might be related to dropout voltage, or possibly a questionable electrical contact somewhere. This is going to be a linear driver, since switching drivers will have a hell of a time with 30k analog input. That means it has a minimum dropout voltage, and cannot supply the output voltage to push the current you want with the load configuration you have.

The following measurements will confirm this: Voltage input, voltage output, and the voltage across the laser diode.
__________________
A problem well stated is a problem half solved.

Last edited by Cyparagon; 08-29-2015 at 11:41 AM.
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 01:14 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