🌦️ בונים תחנת מזג אוויר ביתית משלושה כלים פשוטים

You can know what the weather will do without opening an app on your phone, you just need to build a small home weather station. This project has three simple tools you can build in about an hour with things you already have at home. The first is a rain gauge: a clear plastic bottle with the top cut off and flipped upside down inside the bottle (like a funnel), with a ruler taped on the inside, any rain that falls collects in the bottle so you can measure exactly how many millimeters fell. The second is a wind sock: a long plastic bag or an old sock open at both ends, tied to a stick and stuck in the ground outside, wind direction is shown immediately by which way the sock 'points,' and wind strength is visible by how much the sock puffs out. The third, and trickiest, is a simple barometer that measures air pressure: stretch a rubber balloon over the opening of a glass jar and secure it tightly, then tape a long straw across the stretched balloon like a needle. When air pressure rises, it pushes on the balloon from outside and the straw moves down, when air pressure drops (sometimes a sign of rain coming soon), the balloon puffs outward and the straw moves up. If you record your measurements every day in a small table, within a week or two you can start noticing patterns, and sometimes even guess correctly what tomorrow will bring before the weather app on your phone even tells you.