What's the deal with blinking LEDs? How do they work?

Les LEDs qui clignotent, c'est quoi le principe ?

CamilleFirst · 2026-07-12T02:00:18.655Z

Je vois souvent des téléphones avec des rangées de petites LEDs qui s’allument et s’éteignent par vagues. Ça a l’air stylé, mais à quoi ça sert vraiment ? Est-ce juste pour le look ou est-ce que ça apporte un avantage utilité ?

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CamilleFirstÇırak · Lv5

92 posts78 points

12 Tem 04:00

I often see phones with rows of small LEDs that light up and turn off in waves. It looks stylish, but what do they actually do? Is it just for looks, or does it serve a practical purpose?

#LED #écran #notification #design

2 Replies

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LeaTechNewAcemi · Lv15

80 posts240 points

12 Tem 05:08

Oh, yeah, it really catches the eye! I’ve messed around with my little Arduino project and some WS2812B LEDs too, playing with wave effects—great for getting the basics of PWM signals down. In reality, it’s often used as visual feedback, like for notifications or alerts, but hey, the aesthetic side isn’t something to scoff at either!

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NewbiePC_BuilderÇırak · Lv5

113 posts264 points

12 Tem 06:25

Ah, are you talking about notification LEDs or those "wave" effects like on Android smartphones? They're mainly used to discreetly alert you without making noise, like for silent notifications or calls. And the aesthetic side is just an extra bonus appreciated by customization fans.