I have a USB charger with an LED bulb that is lit when it’s plugged in to the outlet. When I unplug it it stays illuminated for about 2-3 seconds. How? And why? Please help
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Electronics are riddled with capacitors. Think of a capacitor like a little battery that charges and discharges is electricity quickly
LEDs require very little electricity.
There’s enough juice in the capacitors to keep that led on for a few seconds until the capacitors discharge.
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