Students will be given an amplifier/speaker kit to assemble and solder. Students will also create a casing for this circuit system. This can be achieved by using the step-by-step tutorial design provided, or by creating their unique and original design.
Step One: Define Sound
TEACHER NOTE: Review and print Discovery Education lesson on sound waves: http://www.discoveryeducation.com/teachers/free-lesson-plans/the-phenomenon-of-sound-waves.cfm
TEACHER NOTE: Play music at beginning of class using CD player. Emphasize sound differences. Review how sound waves travel by asking students to explain how sound energy travels. Review https://www.youtube.com/watch?v=GkNJvZINSEY
Essential Question: How does sound energy travel?
Formative Assessment: Students should understand that vibrations (e.g., sounds) move at different speeds in different materials and have different wavelengths.
Step Two: Solder the Amplifier Circuit Board
Essential Question: How can you apply your knowledge of auditory processing to make your speaker?
Using the step-by-step instructions provided in the kit, build/solder your circuit board and then connect the two speakers.
Step Three: Create a Vector for a Casing Design
Students will create a simple box vector to house each speaker and kit separately by downloading instructions from www.makercase.com. Download the .SVG file that is specific for design. Students will then import this file into whatever vectoring software is provided (Adobe Illustrator, CorelDraw, Inkscape, etc).
Whether students create a unique casing of their own, or vector a box design as instructed above, it is important afterwards to draw out the specific cutouts for every part that needs to be exposed from the casing (3” speaker fronts, volume control knob, LED switch light, power/auxiliary port).
TEACHER NOTE: Use this step to apply any graphics via laser engraver to make your casing stand out!
Step Four: Putting It All Together
Students will use adhesives and/or screws depending on the project size/materials to assemble casing. This also includes how to attach circuit board inside the casing, based on project design.
See more build steps in Design Brief attachment
Formative Assessment: Have students review Mp3 Speaking Rubric and discuss what changes might improve their speakers performance.
Design Files Developed: Downloaded from MakeCase.com
2x5Watt 6-14DCV/1A Amplifier Kit: http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_2196588_-1
3”, 8 ohm, 5 Watt Speakers: http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_2167285_-1
Power Adapter: The amplifier kit can handle power between 6-14V, so any AC-DC power supply in your lab would work well. If you need to order one, an example that would work well is http://www.jameco.com/z/AD-1280G-Arndt-9-6-Watt-12Volt-800mA-AC-DC-Unregulated-Linear-Wall-A dapter_2217799.html