Experiment-Basic Concept and Test Equipment-chapter-8

 Experiment-Circuit with a Switch

PARTS AND MATERIALS

• 6-volt battery
• Low-voltage incandescent lamp (Radio Shack catalog # 272-1130 or equivalent)
• Long lengths of wire, 22-gauge or larger
• Household light switch (these are readily available at any hardware store)

Switch

Household light switches are a bargain for students of basic electricity. They are readily available, very inexpensive, and almost impossible to damage with battery power. Do not get "dimmer" switches, just the simple on-off "toggle" variety used for ordinary household wall-mounted light controls.

CROSS-REFERENCES

Lessons In  "Basic Concepts of Electricity"

LEARNING OBJECTIVES

Improving Safety in Machine Control Systems with Limit Switches

Technology Overview

Imagine a product being moved on a conveyor belt that somehow gets out of place. Not having a limit switch at the edge of the belt to stop the process could cause damage to the product and equipment or pose a safety hazard to the operator and facility. That is the risk for machine control systems with moving mechanical parts. We will discuss different types of limit switches and how they are critical components that serve many purposes including safety and mechanical. 

Types of Switches

Switches

In electrical and electronic system, a switch is a device, which can make or break an electrical circuit or we can say that switch is a controlling device, which interrupt the flow of current or direct the flow of current in another direction. Almost all the electrical and electronics systems contain at least one switch, which is used to make the device ON or OFF. In addition, a switch is used to control the circuit operation and user may able to activate or deactivate the whole or certain parts of the connected circuit.