# DC5V WS2812B 144leds flickering

**URL:** <https://wled.discourse.group/t/dc5v-ws2812b-144leds-flickering/12301>\
**Category:** Issues\
**Created:** [July 24, 2024, 6:07pm UTC](https://wled.discourse.group/t/dc5v-ws2812b-144leds-flickering/12301 "2024-07-24T18:07:59Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![sleepy](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/sleepy/32/8098_2.png) [@sleepy](https://wled.discourse.group/u/sleepy)\
**Post date:** [July 24, 2024, 6:07pm UTC](https://wled.discourse.group/t/dc5v-ws2812b-144leds-flickering/12301/1 "2024-07-24T18:07:59Z")

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hey, this might be a dumb question, Is there anyway to test/measure a faulty led strip to find what is wrong, cause i have 6 one meter DC5V ws2812b 144 led/m, that i connected one by one to a esp32 development board with wled v0.14.4 just to test them out and one of them is flickering, all have the same wires and length, power supply 5v30a.

Best regards,

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**Author:** ![Jinx](https://avatars.discourse-cdn.com/v4/letter/j/c6cbf5/32.png) [@Jinx](https://wled.discourse.group/u/Jinx)\
**Post date:** [July 24, 2024, 11:08pm UTC](https://wled.discourse.group/t/dc5v-ws2812b-144leds-flickering/12301/2 "2024-07-24T23:08:37Z")

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See if that strip works connected after one of the working ones. If it does I would add a level shifter.

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<div class="post-metadata">

**Author:** ![sleepy](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/sleepy/32/8098_2.png) [@sleepy](https://wled.discourse.group/u/sleepy)\
**Post date:** [July 25, 2024, 11:41am UTC](https://wled.discourse.group/t/dc5v-ws2812b-144leds-flickering/12301/3 "2024-07-25T11:41:55Z")

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unfortunately it did not work, it’s still flickering, but it seems like it’s only the last 47 leds that is flickering in the strip, could one bad faulty led cause the rest to act wired?,

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**Author:** ![Jinx](https://avatars.discourse-cdn.com/v4/letter/j/c6cbf5/32.png) [@Jinx](https://wled.discourse.group/u/Jinx)\
**Post date:** [July 25, 2024, 10:05pm UTC](https://wled.discourse.group/t/dc5v-ws2812b-144leds-flickering/12301/4 "2024-07-25T22:05:07Z")

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Yep, sounds like a bad strip.

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**Author:** ![TokyoDave](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/tokyodave/32/7405_2.png) [@TokyoDave](https://wled.discourse.group/u/TokyoDave)\
**Post date:** [July 29, 2024, 4:20am UTC](https://wled.discourse.group/t/dc5v-ws2812b-144leds-flickering/12301/5 "2024-07-29T04:20:05Z")

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You might be able to inject power and data just before the bad section, even without cutting the strip. If the problem persists, you can splice the bad section out.

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<div class="post-metadata">

**Author:** ![sleepy](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/sleepy/32/8098_2.png) [@sleepy](https://wled.discourse.group/u/sleepy)\
**Post date:** [July 29, 2024, 5:03pm UTC](https://wled.discourse.group/t/dc5v-ws2812b-144leds-flickering/12301/6 "2024-07-29T17:03:13Z")

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so i removed the first led out of the last 47 led’s, and soldered the strip together again, and it seems like it works now, it’s been on for a couple of hours and no flickering,