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 10-23-2008, 07:32 PM #1
Junior Member
 
Join Date: Oct 2008
Posts: 13
Rep Power: 0
tomi77 is on a distinguished road
tomi77 tomi77 is offline
Junior Member
 
Join Date: Oct 2008
Posts: 13
Rep Power: 0
tomi77 is on a distinguished road
Default how to measure mA with this multimeter?

i saw same kind of question with a photo few pages back, but this meter has a slight difference to that other i think.
so i want to be sure how to measure mA with this.
should i put black to the COM, red to the red circle place ofcourse. turn the pot to Vac 200?
thanks
tomi
Attached Thumbnails
how to measure mA with this multimeter?-laserforum.jpg  


tomi77 is offline   Reply With Quote







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







Old 10-23-2008, 07:50 PM #2
Member
 
Join Date: Oct 2008
Posts: 47
Rep Power: 0
12dstring is on a distinguished road
12dstring 12dstring is offline
Member
 
Join Date: Oct 2008
Posts: 47
Rep Power: 0
12dstring is on a distinguished road
Default Re: how to measure mA with this multimeter?

If you're measuring up to 200mA (no more or else you'll blow the internal fuse) then switch it to Adc 200m and put the black lead in COM, and the red lead in the red socket.

Any more than 200mA and switch it to Adc 10A and put the red lead into the green socket.
12dstring is offline   Reply With Quote
Old 10-23-2008, 08:26 PM #3
Junior Member
 
Join Date: Oct 2008
Posts: 13
Rep Power: 0
tomi77 is on a distinguished road
tomi77 tomi77 is offline
Junior Member
 
Join Date: Oct 2008
Posts: 13
Rep Power: 0
tomi77 is on a distinguished road
Default Re: how to measure mA with this multimeter?

thanks for answering.
i tried that *-switch it to Adc 200m and put the black lead in COM, and the red lead in the red socket-
, but nothing appeared to the screen.
only when i turned to Vac 200 there was something like "21".
i forgot to mention that i have a driver witch should be setted to 38mA.
my ps3 5-pin diode was so very dim that i wanted to make sure that the mA could be the promised 38mA or near.. i know it is should be dim but that dim..
is it ok to try to measure from these points?

Attached Thumbnails
how to measure mA with this multimeter?-laserforum2.jpg  
tomi77 is offline   Reply With Quote
Old 10-23-2008, 08:57 PM #4
Member
 
Join Date: Oct 2008
Posts: 47
Rep Power: 0
12dstring is on a distinguished road
12dstring 12dstring is offline
Member
 
Join Date: Oct 2008
Posts: 47
Rep Power: 0
12dstring is on a distinguished road
Default Re: how to measure mA with this multimeter?

At the moment you will be measuring voltage.
[s]To measure the current you need to connect the multimeter in series by putting one probe on a laser diode pin, and the other where you would connect that pin to on the driver board.[/s]

Edit: I was wrong, apologies
12dstring is offline   Reply With Quote
Old 10-23-2008, 09:04 PM #5
Jimmymcjimthejim's Avatar
Class 3R Laser
 
Join Date: Apr 2008
Location: South Florida
Posts: 1,543
Rep Power: 135
Jimmymcjimthejim has a reputation beyond reputeJimmymcjimthejim has a reputation beyond reputeJimmymcjimthejim has a reputation beyond reputeJimmymcjimthejim has a reputation beyond reputeJimmymcjimthejim has a reputation beyond reputeJimmymcjimthejim has a reputation beyond reputeJimmymcjimthejim has a reputation beyond reputeJimmymcjimthejim has a reputation beyond reputeJimmymcjimthejim has a reputation beyond reputeJimmymcjimthejim has a reputation beyond reputeJimmymcjimthejim has a reputation beyond repute
Jimmymcjimthejim Jimmymcjimthejim is offline
Class 3R Laser
Jimmymcjimthejim's Avatar
 
Join Date: Apr 2008
Location: South Florida
Posts: 1,543
Rep Power: 135
Jimmymcjimthejim has a reputation beyond reputeJimmymcjimthejim has a reputation beyond reputeJimmymcjimthejim has a reputation beyond reputeJimmymcjimthejim has a reputation beyond reputeJimmymcjimthejim has a reputation beyond reputeJimmymcjimthejim has a reputation beyond reputeJimmymcjimthejim has a reputation beyond reputeJimmymcjimthejim has a reputation beyond reputeJimmymcjimthejim has a reputation beyond reputeJimmymcjimthejim has a reputation beyond reputeJimmymcjimthejim has a reputation beyond repute
Default Re: how to measure mA with this multimeter?

No, you need a load. Connect the load (which can consist of 3 diodes in series, or an LED) to the driver and place the multimeter in series from the battery negative to driver negative or same with positive. A more recommended way (as the previous one can be a little inaccurate) is to place a 1-Ohm resistor in series with the driver, and measure the voltage from one side of the resistor to the other side.
Edit: Reading the post above, DO NOT PLACE THE MULTIMETER IN SERIES WITH THE DIODE. ONE SMALL DISCONNECT AND RECONNECT WILL CHARGE AND DISCHARGE THE CAPACITOR, THUS KILLING THE DIODE. When the diode is powered, make sure that it is soldered at all times. With the above method, you want to use a test load.
__________________
Current Lasers:
8??nm: 1050mA DIY Micro Sized
658nm: 2mW keychain pointer - DIY 80mA/350mA switchable in Altoids tin - 300mA DIY Micro Sized
632.8nm: 10mW Hughes HeNe - 15mW Melles Griot HeNe - 1mW Melles Griot bare tube
612nm: 5mW Meredith Instruments HeNe
594.1nm: 4mW Meredith Instruments HeNe
543nm: 2mW Melles Griot HeNe - <1mW Multimode 6" HeNe (He's cute!)
532nm: 5mW Lyra-G5 - 70mW DIY by Wannaburn
473nm: 5mW Lab Style
445nm: DIY 650mA in Sonar II Host
405nm: DIY LG 10X at 330mA with Ehgemus host and Microboost - CNI GLP-405 70mW
Jimmymcjimthejim is offline   Reply With Quote
Old 10-24-2008, 12:00 AM #6
Class 2M Laser
 
Join Date: Feb 2008
Posts: 733
Rep Power: 83
hydrogenman15 has a reputation beyond reputehydrogenman15 has a reputation beyond reputehydrogenman15 has a reputation beyond reputehydrogenman15 has a reputation beyond reputehydrogenman15 has a reputation beyond reputehydrogenman15 has a reputation beyond reputehydrogenman15 has a reputation beyond reputehydrogenman15 has a reputation beyond reputehydrogenman15 has a reputation beyond reputehydrogenman15 has a reputation beyond reputehydrogenman15 has a reputation beyond repute
hydrogenman15 hydrogenman15 is offline
Class 2M Laser
 
Join Date: Feb 2008
Posts: 733
Rep Power: 83
hydrogenman15 has a reputation beyond reputehydrogenman15 has a reputation beyond reputehydrogenman15 has a reputation beyond reputehydrogenman15 has a reputation beyond reputehydrogenman15 has a reputation beyond reputehydrogenman15 has a reputation beyond reputehydrogenman15 has a reputation beyond reputehydrogenman15 has a reputation beyond reputehydrogenman15 has a reputation beyond reputehydrogenman15 has a reputation beyond reputehydrogenman15 has a reputation beyond repute
Default Re: how to measure mA with this multimeter?

Quote:
Originally Posted by 12dstring
If you're measuring up to 200mA (no more or else you'll blow the internal fuse) then switch it to Adc 200m and put the black lead in COM, and the red lead in the red socket.

Any more than 200mA and switch it to Adc 10A and put the red lead into the green socket.
My meter gives me a false reading on the ma's setting so I usually use the amps setting. 8-)

--hydro15
hydrogenman15 is offline   Reply With Quote
Old 10-24-2008, 03:49 AM #7
Junior Member
 
Join Date: Oct 2008
Posts: 13
Rep Power: 0
tomi77 is on a distinguished road
tomi77 tomi77 is offline
Junior Member
 
Join Date: Oct 2008
Posts: 13
Rep Power: 0
tomi77 is on a distinguished road
Default Re: how to measure mA with this multimeter?

thanks for helping.
i got to buy a load.
cheers,
tomi
tomi77 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 06:52 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