Summary

A switch is a crucial component in electrical circuits as it can control the flow of electricity by making or breaking a connection. In this topic, we will study the basic construction, different types of switches, the function and purpose of switches, the tools and equipment required to demonstrate a basic switch, and more.

Diagram

Basic Switch

Diagram: A figure showing a Basic Switch & its states

Parts and Specifications

PartsSpecifications
SwitchSPST, SPDT, DPST, DPDT
Wires20-22 gauge
BreadboardHalf-sized breadboard

Tools and Equipment

  • Breadboard
  • Jumper Wires
  • Power Supply
  • Multimeter

Procedure

To demonstrate a basic switch, follow these steps:

  1. Gather all the required parts and tools mentioned above.
  2. Connect the power supply to the breadboard.
  3. Connect one end of the switch to the power supply on the breadboard and the other end to the load (e.g., LED or buzzer).
  4. Use the multimeter to measure the resistance and verify that the switch is open.
  5. Close the switch by pressing the button and verify that the resistance is zero.
  6. Observe that the load is now powered on, indicating that the switch has made a connection.

Theory

A switch is an electrical component that can make or break an electrical connection. It is designed to control the flow of electricity in a circuit. There are several types of switches, including SPST (Single Pole Single Throw), SPDT (Single Pole Double Throw), DPST (Double Pole Single Throw), and DPDT (Double Pole Double Throw).

Types of Switches:

SPST Switch

SPST (Single Pole Single Throw):

These switches have a single contact that can either be connected or disconnected. It is the simplest type of switch.

Working of SPST

SPDT Switch

SPDT (Single Pole Double Throw):

These switches have two contacts and can switch between two separate circuits. It is commonly used for switch-selector applications.

Working of SPDT

DPST Switch

DPST (Double Pole Single Throw):

These switches have two separate contacts that can either be connected or disconnected simultaneously. This type of switch is used for applications where two separate circuits need to be controlled by a single switch.

Working of DPST

DPDT Switch

DPDT (Double Pole Double Throw):

These switches have two separate sets of contacts that can switch between two separate circuits. It is commonly used for reversing switch applications.

Working of DPDT

Uses of Switches

Switches play a crucial role in electrical circuits as they are used to control the flow of electricity. They are used in various applications such as turning on/off lights, controlling appliances, and in complex circuit designs such as computer motherboards, digital circuits, and more.

Conclusion

In conclusion, switches are essential components in electrical circuits as they control the flow of electricity. Understanding the basic construction, different types, functions, and uses of switches is important in electrical engineering. By demonstrating a basic switch, one can have a better