NO Push Button

 What is NO Button How does it works ?

In electrical systems, a "NO" push button refers to a "Normally Open" push button switch. Here's a brief description:

1. Normally Open (NO) Configuration

   - In its default state, the switch contacts are open, meaning there is no electrical connection between them.

   - When the button is not pressed, the circuit is open and no current flows through it.

2. Operation

   - When the button is pressed, the contacts close, completing the circuit and allowing current to flow.

   - Once the button is released, the contacts return to their open state, breaking the circuit and stopping the current flow.

3. Applications

   - Commonly used in momentary control applications where an action is required only while the button is pressed, such as in doorbells, start buttons for machines, or emergency stop buttons.

4. Symbol

   - In circuit diagrams, a NO push button is often represented by two parallel lines that are not touching, sometimes with an arrow indicating the act of pressing.

Here's a more detailed description along with an illustration for a Normally Open (NO) push button in electrical systems:

Detailed Description

Components and Operation:

1. Contacts 

   - Two metal contacts inside the switch remain separated in the default state (open).

   - Pressing the button brings the contacts together (closed), allowing current to flow.

2. Spring Mechanism

   - A spring inside the switch ensures that the contacts return to the open state once the button is released.

3. Housing

   - The button and contacts are enclosed in a protective housing to prevent accidental short circuits and provide mechanical support.

Electrical Symbol

- The electrical symbol for a NO push button looks like this:

  The lines represent the open contacts, and the ( ) indicates the button mechanism.

Illustration

Below is a simple diagram showing the NO push button in both states:

Normally Open (Default State)

- The contacts are open, so no current flows.

When Pressed (Closed State)

- The contacts are closed, allowing current to flow.

 Example Application: Simple Circuit with an Lamp

Consider a circuit where a NO push button is used to control an Lamp

- Components

  - NO Push Button

  - Lamp

  - Power Source (A/C)

- Circuit Diagram

  L1 (Power) ---|NO Push Button|---|Lamp|--- L2 (Power)

  - When the push button is not pressed, the circuit is open, and the Lamp is off.

  - When the push button is pressed, the circuit is completed, and the Lamp lights up.

This illustrates a basic use of a NO push button in an electrical circuit, providing a momentary connection when activated.