Vacuum cleaner static prevention

Mon, 03 Mar 2025 00:00:00 +0000

How to Prevent Static Electricity When Using a Vacuum Cleaner in Dry Winter#

This explains how to prevent static electricity when using a vacuum cleaner in dry winter conditions.

Problem: I’m Afraid to Use the Vacuum Cleaner in Winter Because of Static Electricity#

It’s currently a dry and cold February winter in Korea. My previous vacuum cleaner broke, so I bought a new cordless one. At some point while using this vacuum cleaner, I started to feel a sudden, sharp electric tingling at the handle. Even wearing thick gloves while cleaning, the tingling sensation from the electricity continued. As this kept happening, it got to the point where I became afraid to use the vacuum cleaner.

How LED Brightness Is Controlled

Sun, 21 Dec 2025 00:00:00 +0000

How Does an LED Control Its Brightness?#

Take a close look at Christmas tree lights. The lights don’t just turn on and off — they gradually get brighter and then gradually dimmer. In other words, the brightness is being controlled.

Is the LED’s brightness really being controlled? No! In fact, it’s tricking our eyes into thinking the LED’s brightness is being adjusted. Let me explain the principle.

A Simple LED Circuit#