Go to Post Because you know what they say, the new year doesn't begin until Dean, Dave, and Woodie drop the big one. - Jay Trzaskos [more]
Home
Go Back   Chief Delphi > ChiefDelphi.com Website > Extra Discussion
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
 
 
Thread Tools Rating: Thread Rating: 2 votes, 5.00 average. Display Modes
Prev Previous Post   Next Post Next
  #14   Spotlight this post!  
Unread 22-01-2016, 00:26
ratdude747's Avatar
ratdude747 ratdude747 is offline
Official Scorekeeper
AKA: Larry Bolan
no team
 
Join Date: Feb 2009
Rookie Year: 2008
Location: Madison, IN
Posts: 1,064
ratdude747 has a reputation beyond reputeratdude747 has a reputation beyond reputeratdude747 has a reputation beyond reputeratdude747 has a reputation beyond reputeratdude747 has a reputation beyond reputeratdude747 has a reputation beyond reputeratdude747 has a reputation beyond reputeratdude747 has a reputation beyond reputeratdude747 has a reputation beyond reputeratdude747 has a reputation beyond reputeratdude747 has a reputation beyond repute
Re: pic: What's weird with this image

Quote:
Originally Posted by JamesBrown View Post
Seems entirely plausible to me that the LED was simply installed backwards. Bi Color LEDs are (usually at least) 3 pin, with the center being the common Cathode, and pins 1 and 3 being the two different anodes. It would be a pretty simple mistake to install the LED 180 degrees out and have the colors reversed.
No, actually they do make two pin bi-color LEDs. The color is determined by the direction of current (so the anode of one color is the cathode of the other and vice versa). IIRC this used to be and still may be common, as they are particularly useful for driver circuits involving OP-AMP voltage comparitors; they still work for digital circuits too (if run between two outputs, one used to source, one used to sink).

That said, once again, a backwards LED would still have the same result. However, I'd think these were machine assembled which would mean that the error would have to be with the component itself (either in the reel tape backwards or somehow assembled wrong at the LED fab).

Either way, I'd consider that to be DOA and grounds for a warranty exchange.
__________________
Dean's List Semi-finalist 2010
1747 Harrison Boiler Robotics 2008-2010, 2783 Engineers of Tomorrow 2011, Event Volunteer 2012-current

DISCLAIMER: Any opinions/comments posted are solely my personal opinion and does not reflect the views/opinions of FIRST, IndianaFIRST, or any other organization.
Reply With Quote
 


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 05:01.

The Chief Delphi Forums are sponsored by Innovation First International, Inc.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi