Relay wiring is a fundamental concept in electrical and electronic systems, allowing low-power control circuits to operate high-power devices. This versatile component is widely used in various applications, from automation systems to car electronics. In this article, we will explore the basic principles of relay wiring, its components, and how to wire a relay effectively in different circuits.

What is a Relay? A relay is an electrically operated switch that enables a small electrical current to control a much larger current. It essentially functions as a bridge, using a low-power control signal to switch a high-power circuit on or off. The relay consists of three main parts： the coil, contacts, and armature. Coil： The coil is a wire wound into a solenoid. When current flows through it, it generates a magnetic field. Contacts： The relay has several types of contacts, including normally open (NO) and normally closed (NC) contacts. These contacts are the key to switching the high-power circuit.