1. Daily Sprint 1.How do you feel about your test performance? 2.What will you do differently to prepare for your next test? 3.What is current, voltage, and resistance? START

2. Circuit Design

3. Circuits What are electric circuits used for? Where have you seen electric circuits before?

4. Circuit Design Key Concepts Essential Questions What Is a Circuit? Circuit Diagrams Series Circuits Parallel Circuits Combination Circuits This presentation is intended to be used with Project 4.2.1 Circuit Design.

5. Concepts 1. An electrical circuit is a system made up of conductors and electrical components that form a complete path for electrical current. 2. Engineers use circuit diagrams to communicate components and functions of electrical circuits.

6. Concepts 3. A variety of electronic components are incorporated into electrical circuits by engineers to achieve specific functions. 4. When building or diagnosing circuits, it is important to be able to measure voltage, current, and resistance.

7. Concepts 5. Ohm’s Law explains the mathematical relationship between voltage, current, and resistance. 6. The transistor is an important electronic device because it allows a small amount of current to control a larger amount of current.

8. Concepts 7. Engineers, designers, and engineering technologists are needed in high demand for the development of future technology to meet societal needs and wants.

9. Essential Questions 1. How are series and parallel electrical circuits similar? Different? 2. Why is it important that those who create and use circuit diagrams use common symbols or conventions?

10. Essential Questions 3. Why is the mathematical relationship expressed through Ohm’s Law so important for designing and evaluating electrical circuits?

11. What Is a Circuit? A system of conductors and components forming a complete path for an electric current If the path is broken anywhere in the circuit, current stops flowing. How many ways could the path be broken in the image below?

12. Circuit Diagrams A drawing that traces the path that electron flow will take in an electronic circuit Electronic components and functions are represented by symbols. Draw a map from the school to your house or some other destination. How did you draw roads, buildings, the school? What other symbols did you create? In an electronic circuit diagram, the roads are like wires. The buildings, houses, etc. are like components.

13. Circuit Diagrams A drawing that traces the path that electron flow will take in an electronic circuit Electronic components and functions are represented by symbols. Lamp Battery Switch

14. Series Circuits A circuit that contains only one path for current flow If a component is removed, the path is opened and current cannot flow to any components.

15. Series Circuits A circuit that contains only one path for current flow If the path is open anywhere in the circuit, current stops flowing to all components.

16. Series Circuits A circuit that contains only one path for current flow Build a series circuit which contains to lamps Sketch the circuit in your engineering notebook and trace the path that the electrons take in the circuit. Sketch a schematic diagram of this circuit in your engineering notebook.

17. Parallel Circuits A circuit that contains more than one path for current flow If a component is removed, then it is possible for the current to take another path to reach other components.

18. Parallel Circuits A circuit that contains more than one path for current flow Create a parallel circuit utilizing the board with two paths to two lights. Sketch the solution in your engineering notebook and trace paths of the circuit. Sketch a schematic diagram of this circuit in your engineering notebook.

19. Combination Circuits Contain both series and parallel arrangements What would happen if you removed light 1? light 2? light 3? 1 2 3 Create a combination circuit utilizing the board, then sketch the circuit diagram in your engineering notebook.

20. Combination Circuits Contain both series and parallel arrangements

21. Image Resources Microsoft, Inc. (2008). Clip Art. Retrieved November 20, 2008, from http://office.microsoft.com/en-us/clipart/default.aspx