What is a momentary push button switch?

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A momentary push button switch is a type of switch that only maintains its "on" state while the switch is being actively pressed or held down. As soon as the button is released, the switch returns to its "off" state. These switches are often used in electronic circuits or devices where temporary activation is needed, such as a doorbell or a computer mouse button.

They come in different sizes, shapes, and configurations, but typically consist of a button that is pressed down to make contact between two metal contacts, allowing electrical current to flow. Once the button is released, the contacts are separated again, interrupting the current flow and returning the switch to its off state.

How a push button switch works

A push button switch is an electronic switch that is activated by pressing a button or a plunger. It is commonly used in electronic devices and machines for various purposes, such as turning on or off a circuit, changing the direction of a motor, or selecting a specific function.

The basic operation of a push-button switch is simple. It consists of two metal contacts that are separated by a small gap. When the button is pressed, it moves a metal plunger that bridges the gap between the contacts, completing the circuit and allowing current to flow through.

In some push button switches, the contacts are normally open, which means that the circuit is open when the button is not pressed. When the button is pressed, the contacts close and the circuit is completed.

In other push button switches, the contacts are normally closed, which means that the circuit is closed when the button is not pressed. When the button is pressed, the contacts open and the circuit is broken.

Push button switches can be designed with different configurations, such as momentary or latching. Momentary switches only make contact when the button is pressed and held, while latching switches maintain their contact even after the button is released until it is pressed again.

How to wire the momentary push button switch?

The push button switch typically involves connecting it to a power source and a load or device that the switch will control. The specific wiring diagram will depend on the type of switch and the circuit you are working with, so it's important to consult the switch's documentation or a qualified electrician if you are unsure about the wiring.

However, here are the basic steps you can follow to wire a momentary push button switch:

Identify the terminals

Momentary push button switches typically have four terminals or pins: two for power and two for the load. The power terminals are usually labeled "NO" (normally open) and "NC" (normally closed), while the load terminals are typically labeled "C" (common) and "NO" (normally open).

Connect the power source

Connect one of the power terminals (either NO or NC) to the positive (+) side of the power source, and connect the other power terminal to the negative (-) side of the power source. You can use a voltage meter to test the power source and make sure it is working properly.

Connect the load

Connect one of the load terminals (usually C) to the device or load you want to control with the switch and connect the other load terminal (usually NO) to the negative (-) side of the device or load. This will create a circuit that is normally open but will close momentarily when the button is pressed.

Test the switch

Once you have connected all the terminals, test the switch to make sure it is working properly. Press the button and check that the device or load is turning on or off as expected.

Remember to always follow safety guidelines when working with electricity, and if you are not confident in your wiring skills, seek the help of a professional electrician.