Cách sử dụng
A tachometer is a device used to measure the speed of something that rotates, like a car engine or a bicycle wheel. It typically displays the speed in revolutions per minute (RPM). Tachometers are commonly used in vehicles, such as cars and motorcycles, to monitor engine RPMs and ensure that the engine is running at the correct speed. They can also be used in industrial settings to monitor the speed of machinery.