Basic Electricity Electronics Lesson 1 Electricity Electronics in

Basic Electricity & Electronics Lesson 1 - Electricity & Electronics in Everyday Lives, Electronic Systems, Conductors & Insulators

Objectives • Role of electronics in everyday life • Open-loop & closed-loop system (block diagram, differences & examples) • Electrical conductors, insulators & semiconductors (differences & examples)

Role of Electronics in Everyday Life

Basic Electronic Systems • Open-loop system – Cannot auto adjust itself when there’s changes in the environment Input Process Output

Basic Electronic Systems • Closed-loop system – Can auto adjust itself when there’s changes in the environment Feedback Input Process Output

Open-loop or Closed-loop System? Closed-loop Open-loop

Open-loop or Closed-loop System? Open-loop

Open-loop or Closed-loop System? Closed-loop

Input, Process & Output Process Input

Conductors & Insulators • Electrical conductor is a material that allows electricity to flow through easily • Eg. aluminium, copper, silver, gold & most metals • Electrical insulators is a material that does not allow electricity to flow through easily • Eg. rubber, wood, glass & most plastics

Semiconductors • Material properties similar to conductor and insulator • Examples: silicon & germanium

Conclusion • Electronics are used for providing comfort, entertainment, communication and makes job easier • Closed-loop system has feedback & can auto adjust itself, but not open-loop system • Auto-door, microwave oven & air-con are examples of closed-loop systems • Laptop, fan, telephone & vending machine are examples of open-loop systems

Conclusion • Good conductors (aluminium, copper, silver, gold & most metals) • Good insulators (rubber, wood, glass & most plastics) • Semiconductors (silicon, germanium)

Activity of the day • Go to http: //www. andythelwell. com/blobz/ • Do the following: – Section 1: What makes circuits work? – Section 2: Conductors and Insulators • Complete worksheet