A push button is a simple mechanism that controls an electric circuit, making it one of the most common and easy-to-understand components in electronics. When you press a push button, it completes a and allows current to flow, activating a connected component or system (like a light, motor, or sound alarm). When you release the button, it returns to its original position and breaks the circuit, stopping the current flow.
A push button typically consists of two metal and a spring. When pressed, the contacts are bridged, allowing electricity to . A momentary push button only completes the circuit when pressed. Once released, it breaks the . This type is widely used in everyday items like keyboards and doorbells. In contrast, a push button remains in its pressed state after being pushed until it’s pressed again, commonly used in on/off power switches.
Push buttons usually have two or four . In a two-pin button, pressing it closes the circuit. Four-pin buttons can have two pins dedicated to the input and two to the output, allowing more control over different . NO (Normally Open) buttons start open, only the circuit when pressed. NC (Normally Closed) buttons are the , completing the circuit when not pressed and opening when pressed.
