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Matt Duwe CSU Fellow EE Scott Kindt Physics Teacher Robb Sommerfeld P.O.E. Teacher Mil Santos Algebra II Teacher. Amplifier Project Objective. - PowerPoint PPT Presentation
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Matt Duwe CSU Fellow EE Scott Kindt Physics Teacher Robb Sommerfeld P.O.E. Teacher Mil Santos Algebra II Teacher
Amplifier Project Objective Working in project teams, students
will design & build a stereo system that will amplify the audio signal from an I-Pod.
Project teams will be divided into three groups.
(a) Amplifier design. Outsource schematic to Kate’s students.
(b) Power supply & box for electronics.
(c) Speaker & cross-over filter Design.
Stage 1 will involve building the Kelvin 20 Watt Amplifier Kit
Initial Teaching Objectives Students will learn the basics on: -Circuits, resistors, capacitors,
transistors -Ohm’s Law, Power equation.
Time Linehttp://www.rockymountainstars.com/Amplifier_Project_CSU_GK12.htm
Group A will design the amplifier section.
Kate’s students will make the printed circuit boards for the amp.
Group B will build the power supply to meet the amp requirements.
Group C will build the speakers & filter circuit.
Sample Speakers
Role of the Junior Fellow
The Junior Fellow will be responsible for integrating all the parts into a working system.
Does the power supply meet the requirements for the amplifier?
Do the speakers have the efficiency to match the amplifier output?
Are we under the $100 budget?
What will the finished product look like????
Solar powered stereo.Hand crank up stereo.Vacuum tube amplifier.Portable battery powered stereo.
Standard solid state amplifier.
The Testing Phase
Power in vs. Power out, amplifier efficiency
Maximum output in db Frequency Response Harmonic Distortion Cross-over point for speaker filter Other measurements
Quantify & Evaluate the Data
The Project in Robb Sommerfeld’s class. Robb’s POE class will devote more
time to material science along with the CAD design & construction of the amplifier box.
Students will have the opportunity experiment with different materials to build the stereo & speakers around the Kelvin 20 watt amplifier.
Example of Design Process
1. Define a Problem2. Brainstorm3. Research and Generate Ideas4. Identify Criteria and Specify
Constraints5. Explore Possibilities6. Select an Approach7. Develop a Design Proposal8. Make a Model or Prototype9. Test and Evaluate the Design
using Specifications10. Refine the Design11. Create or Make Solution12. Communicate Processes and
Results
– ITEA Standards for Technological Literacy
Alternative Speaker Box
THE TEAM’S MISSION
Design
Brief
The Project in Mil’s Algebra II class Mil’s Algebra II classes will build the
Kelvin 20 watt amplifier however their focus will be on testing and measuring the electronics.
The Algebra II classes will also test the custom designed amplifiers made in the physics classes. The results will be compared to the Kelvin amplifier kits.
Audio Testing & Applications in Algebra II
What will students gain by doing this project? Application of the Design process. Working together as an engineering team. Principle behind amplifiers & circuit design. Power Supplies, AC-DC conversion, rectifiers. Hi pass, low pass filters with capacitors & inductors. How to test electronic equipment, amps &
speakers. Efficiency of amplifiers. Application s of Algebra II & Engineering. How to make a scientific poster. How to present your project & ideas to a general
audience.
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CSU CHILL Radar
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