CodeXplain on Instagram: "This fan doesn’t need batteries, just creativity, because it works using simple mechanical design instead of electricity. Made from lightweight materials, it often relies on manual power—such as a pull string, a crank, or even the movement of air itself—to spin the blades and create a cooling effect. Some designs use clever mechanisms like rubber bands or gears to store and release energy, proving that everyday comfort doesn’t always require modern technology. It’s an e

Why is my computer fan so loud? 5 ways to troubleshoot a noisy computer