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 06-16-2013, 11:00 PM #1
Member
 
Join Date: Oct 2010
Posts: 47
Rep Power: 0
plasmaninjaa is on a distinguished road
plasmaninjaa plasmaninjaa is offline
Member
 
Join Date: Oct 2010
Posts: 47
Rep Power: 0
plasmaninjaa is on a distinguished road
Default help with making a test load

Hey guys. I feel like an idiot for posting this because i'm sure it has been posted a million times.
I can't seem to find instructions on how to make a testload for my driver.

I have a 9mm 445nm diode and the blitzbuck v3.1 driver.
The driver is adjustable and I want to set it to 2.3a

please help! sorry for the idiocy


plasmaninjaa is offline   Reply With Quote







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







Old 06-16-2013, 11:17 PM #2
ARG's Avatar
ARG ARG is offline
Super Moderator
 
Join Date: Feb 2011
Location: Canada
Posts: 6,987
Rep Power: 1891
ARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond repute
ARG ARG is offline
Super Moderator
ARG's Avatar
 
Join Date: Feb 2011
Location: Canada
Posts: 6,987
Rep Power: 1891
ARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond repute
Default Re: help with making a test load

Diagram


Parts:
1N5404 diodes rated for 3A or greater
1 Ohm 10 Watt resistor (2% tolerance or less)
You can replace the 1 Ohm resistor with a 10A ameter if you want a better accuracy.
ARG is offline   Reply With Quote
Old 06-16-2013, 11:27 PM #3
Member
 
Join Date: Oct 2010
Posts: 47
Rep Power: 0
plasmaninjaa is on a distinguished road
plasmaninjaa plasmaninjaa is offline
Member
 
Join Date: Oct 2010
Posts: 47
Rep Power: 0
plasmaninjaa is on a distinguished road
Default Re: help with making a test load

so just hook up the ammeter between the first diode and +ve and turn the dial on the driver until I get 2.3a on the ammeter?

because i dont have any 1ohm diodes.
I have a pot but the lowest resistance I can set it to is 4ohms



Quote:
Originally Posted by ARG View Post
Diagram


Parts:
1N5404 diodes rated for 3A or greater
1 Ohm 10 Watt resistor (2% tolerance or less)
You can replace the 1 Ohm resistor with a 10A ameter if you want a better accuracy.
plasmaninjaa is offline   Reply With Quote
Old 06-17-2013, 06:15 PM #4
ARG's Avatar
ARG ARG is offline
Super Moderator
 
Join Date: Feb 2011
Location: Canada
Posts: 6,987
Rep Power: 1891
ARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond repute
ARG ARG is offline
Super Moderator
ARG's Avatar
 
Join Date: Feb 2011
Location: Canada
Posts: 6,987
Rep Power: 1891
ARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond reputeARG has a reputation beyond repute
Default Re: help with making a test load

Quote:
Originally Posted by plasmaninjaa View Post
so just hook up the ammeter between the first diode and +ve and turn the dial on the driver until I get 2.3a on the ammeter?

because i dont have any 1ohm diodes.
I have a pot but the lowest resistance I can set it to is 4ohms
Yup, that will work.

Edit: Referring to the use of an ammeter, obviously a pot will not work.

Last edited by ARG; 06-18-2013 at 03:31 PM.
ARG is offline   Reply With Quote
Old 06-18-2013, 12:06 PM #5
lasersbee's Avatar
Class 4 Laser
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,701
Rep Power: 39577
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
lasersbee lasersbee is offline
Class 4 Laser
lasersbee's Avatar
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,701
Rep Power: 39577
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
Default Re: help with making a test load

Quote:
Originally Posted by plasmaninjaa View Post
Hey guys. I feel like an idiot for posting this because i'm sure it has been posted a million times.
I can't seem to find instructions on how to make a testload for my driver.

I have a 9mm 445nm diode and the blitzbuck v3.1 driver.
The driver is adjustable and I want to set it to 2.3a

please help! sorry for the idiocy
The Search Bar is your friend...

LPF Google Search Bar

Just enter what you are looking for...


Quote:
Originally Posted by ARG View Post
Quote:
Originally Posted by plasmaninjaa View Post
because i dont have any 1ohm diodes.
I have a pot but the lowest resistance I can set it to is 4ohms
Yup, that will work.
BTW... You can't use a standard pot to replace the
1 Ohm Test Load Shunt resistor.
A standard pot can't handle 2.3 Amps of current
without burning out.


Jerry
__________________

J.BAUER Electronics Home Page

LaserBee Laser Power Meter Products meet your needs
at affordable Prices:
See them all here on LPF

LaserBee Power Meter products ALWAYS in Stock
and ready to ship

Also available on eBay:Check availability here..

Subsidary: Pharma Electronic Solutions


This banner is available to and can be copied/used FREE by any LaserBee owner

Last edited by lasersbee; 06-18-2013 at 12:15 PM.
lasersbee is offline   Reply With Quote
Old 06-18-2013, 03:29 PM #6
TheDukeAnumber1's Avatar
Class 3R Laser
 
Join Date: Jun 2012
Location: Illinois
Posts: 2,045
Rep Power: 1871
TheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond repute
TheDukeAnumber1 TheDukeAnumber1 is offline
Class 3R Laser
TheDukeAnumber1's Avatar
 
Join Date: Jun 2012
Location: Illinois
Posts: 2,045
Rep Power: 1871
TheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond repute
Default Re: help with making a test load

Quote:
Originally Posted by plasmaninjaa View Post
so just hook up the ammeter between the first diode and +ve and turn the dial on the driver until I get 2.3a on the ammeter?

because i dont have any 1ohm diodes.
I have a pot but the lowest resistance I can set it to is 4ohms
Your not quite reading the schematic correctly there. IMO, these are great

FS: ***Selectable test load up to 3A (assembled or DIY kit)*** IN STOCK!

or try raising the drivers pot to a high resistance, then run the laser and adjust it on the fly measuring the Amps with a DMM. GL
__________________
“Absence of evidence isn't evidence of absence."
http://laserpointerforums.com/donations.htm
[SIZE="1"]“It is impossible that any ill should happen to the man who is beloved of the Lord; the most crushing calamities can only shorten his journey and hasten him to his reward. Ill to him is no ill, but only good in a mysterious form. Losses enrich him, sickness is his medicine, reproach is his honour, death is his gain. No evil in the strict sense of the word can happen to him, for everything is overruled for good. Happy is he who is in such a case. He is secure where others are in peril, he lives where others die.”—Spurgeon

Last edited by TheDukeAnumber1; 06-18-2013 at 03:30 PM.
TheDukeAnumber1 is offline   Reply With Quote
Old 06-18-2013, 09:51 PM #7
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: help with making a test load

ARG, that configuration will drop over 7 volts at 2.3A. There's some myth going around that diodes always drop 0.7V. And if that isn't bad enough, people always forget about the drop on the shunt. Please don't perpetuate this misconception.
__________________
A problem well stated is a problem half solved.

Last edited by Cyparagon; 06-18-2013 at 09:51 PM. Reason: typo
Cyparagon is online now   Reply With Quote
Old 06-19-2013, 08:30 AM #8
phenol's Avatar
Class 2M Laser
 
Join Date: Oct 2007
Posts: 533
Rep Power: 50
phenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond repute
phenol phenol is offline
Class 2M Laser
phenol's Avatar
 
Join Date: Oct 2007
Posts: 533
Rep Power: 50
phenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond reputephenol has a reputation beyond repute
Default Re: help with making a test load

Regular PN junction diodes may drop well above 1V at elevated currents, but the drop itself will ...drop...as junction temperature increases.
Schottky diodes offer lower forward voltages.
phenol 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 10:33 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