Old 09-07-2008, 02:20 AM #17
WackBag's Avatar
Class 2 Laser
 
Join Date: Aug 2008
Location: Alabama
Posts: 387
Rep Power: 12
WackBag will become famous soon enoughWackBag will become famous soon enough
WackBag WackBag is offline
Class 2 Laser
WackBag's Avatar
 
Join Date: Aug 2008
Location: Alabama
Posts: 387
Rep Power: 12
WackBag will become famous soon enoughWackBag will become famous soon enough
Default Re: Flexdrive output issue

Close up of meter.
Remeber all I want to do is set the flexdrive to put out 420mA to the LD. Thanks!
Attached Thumbnails
Flexdrive output issue-cimg0605.jpg  


WackBag is offline   Reply With Quote


















Old 09-07-2008, 04:09 AM #18
WackBag's Avatar
Class 2 Laser
 
Join Date: Aug 2008
Location: Alabama
Posts: 387
Rep Power: 12
WackBag will become famous soon enoughWackBag will become famous soon enough
WackBag WackBag is offline
Class 2 Laser
WackBag's Avatar
 
Join Date: Aug 2008
Location: Alabama
Posts: 387
Rep Power: 12
WackBag will become famous soon enoughWackBag will become famous soon enough
Default Re: Flexdrive output issue

Ok...nevermind. I disconnected the resistor and measured the current in series with the dummy load. I should of done this in the first place. After measuring the current in series I was easily able to adjust the pot to 420mA. Do you think I fried the 2 diodes by miscalculating the current in my earlier mistakes? One other mistake I may have made is trying to spread the pins apart and thereby shorting out the positive pin on the diode (I don't know). I didn't realize that it is kind of floating in the casing. Anyway, this is harder then I thought but I'm having fun learning my costly errors So did i fry them or maybe short them by spreading the pins like a dumbass?
WackBag is offline   Reply With Quote
Old 09-07-2008, 04:19 AM #19
Class 1M Laser
 
Join Date: Jul 2008
Posts: 199
Rep Power: 10
moond0ggie is on a distinguished road
moond0ggie moond0ggie is offline
Class 1M Laser
 
Join Date: Jul 2008
Posts: 199
Rep Power: 10
moond0ggie is on a distinguished road
Default Re: Flexdrive output issue

If your measuring across the resistor (like in picture^^^), change your DMM to volts.
Use that reading & divide it by 3 (ohm resistor) to get mA.

If you leave the DMM like it is on the mA setting, cut red wire at resistor, then measure with a clip on the red wire & the other on the end of the resistor to get a direct mA reading.

Edit: oh good, you got it!
moond0ggie 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

























Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 04:03 AM.


Powered by: vBulletin
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC