A magnetic switch is a type of reed switch that is triggered by a magnetic field. A magnetic switch is an electrical switch controlled by a magnetic field, usually a permanent magnet. When the magnetic field is applied, the switch closes and activates a wired circuit, allowing current to flow through. Magnetic switches are commonly used to reduce the amount of wiring needed in a circuit, such as in doorbells, security systems, and other devices. Seeed Studio offers a variety of magnetic switches in different sizes and styles. Magnetic Switches are helpful in DIY projects to create motion-triggered devices, like lights, alarms, or fans. With its great contact potential and good consistency, these magnetic switches are the perfect companion for any Arduino project.