If you own an Android smartphone or tablet, you’re likely familiar with your device’s LED notification light. It’s a way for Android to communicate information to you even when your screen is off. A ...

Every smartphone has a built-in flashlight, but back in the day, many Android phones featured another hardware light: an LED that shined whenever you received a new notification or alert—a gentle ...

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No one likes a flickering light source, but lighting is often dependent on the quality of a building’s main AC power. Light intensity has a close relation to the supply voltage, but bulb type plays a ...