Download Circuit Design - BDJ Engineering

START
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?
Circuit Design
Circuits
• What are electric circuits used for?
• Where have you seen electric circuits
before?
Circuit Design
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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.
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.
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.
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.
Concepts
7. Engineers, designers, and engineering
technologists are needed in high demand
for the development of future technology
to meet societal needs and wants.
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?
Essential Questions
3. Why is the mathematical relationship
expressed through Ohm’s Law so
important for designing and evaluating
electrical circuits?
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?
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.
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
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.
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.
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.
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.
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.
Combination Circuits
Contain both series and parallel arrangements
What would happen if you removed light 1? light 2? light 3?
Create a combination circuit utilizing the board, then sketch
the circuit diagram in your engineering notebook.
1
2
3
Combination Circuits
Contain both series and parallel arrangements
Image Resources
Microsoft, Inc. (2008). Clip Art. Retrieved November 20, 2008, from
http://office.microsoft.com/en-us/clipart/default.aspx