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File:LedFailure1.png

From Wikipedia, the free encyclopedia

Original file ‎(1,320 × 1,080 pixels, file size: 191 KB, MIME type: image/png)

Summary

Description
If a LED goes open circuit, then, if the voltage is high enough, the current that should have gone through that LED could theoretically find an alternative route through other LEDs.
  • For example, if LED1 (L1) goes open circuit, then current could still flow from terminal 3 to terminal 2 through L2 and L3. Other possible routes are through L4/L5, L6/L7 and L8/L9.
  • However, if LED1 goes short circuit, then, any time just one of its terminals is connected to the supply, then both it's terminals are connected to that supply:
    • If terminals 2 and 3 have opposite polarities, then R2 and R3 will act as a potential divider, halving the voltage at the junction of these resistors. This reduced voltage may prevent other LEDs in the array lighting when they should.
    • If terminal 2 or terminal 3 is negative, then both the red and brown tracks will be negative at the same time. Therefore, some LEDs connected to these tracks could light up unintentionally when terminals 1, 4, 5 or 6 are positive.
    • Similarly, if terminal 2 or terminal 3 is positive, then both the red and brown tracks will be positive at the same time. Therefore, some LEDs connected to these tracks could light up unintentionally when terminals 1, 4, 5 or 6 are negative.
Date
Source Own work
Author Ron Binstead

Licensing

I, the copyright holder of this work, hereby publish it under the following license:
w:en:Creative Commons
attribution share alike
This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license.
You are free:
  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
Under the following conditions:
  • attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
  • share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.

Captions

Failure of 1 LED can cause current to be re-routed through other LEDS.

Items portrayed in this file

depicts

inception

22 May 2023

media type

image/png

File history

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Date/TimeThumbnailDimensionsUserComment
current13:03, 22 May 2023Thumbnail for version as of 13:03, 22 May 20231,320 × 1,080 (191 KB)Touchscreen1Uploaded own work with UploadWizard
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Retrieved from "https://en.wikipedia.org/wiki/File:LedFailure1.png"
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