1. Bangarang Musical Engineering University of Notre Dame Department of Aerospace and Mechanical Engineering Group Members: Roberto Ayala, Ryan Bradley, Pat Fox, Matt Medlock, Mike Tieu 11.7.2006

2. Status of Design Concept Design currently visualized:

3. Status of Design Concept

4. Project Scheduling Project Scheduling - On schedule according to group and class deadlines Showstoppers Showstoppers - ? System Response Time ? - Solenoid Output Force at Lower Voltages

5. Last Week’s Action Items Item: Item: - Machine all components for the design Action: Action: - Group coordinated efforts and traveled to machine shop on 11/2/06 Outcome: Outcome: - All parts machined for assembly - Only part remaining to be CNC machined is frame top

6. Last Week’s Action Items

7. Item: Item: - Build the frame used to support the drums and actuator Action: Action: - 80/20 Aluminum selected as material for base frame - Wood chosen as the material for the top cover - Group members met on 11/5 and 11/6 to complete frame Outcome: Outcome: - Frame completed – 3’ x 2’ x 1¼’ - Only CNC left to perform on wood

8. Last Week’s Action Items Item: Item: - Build and test the voltage regulator circuit Action: Action: - Gather electronic components and assemble by 11/7/06 Outcome: Outcome: - Initial design for regulator circuit failed due to complications with transistors - Different, more simple circuit proposed - Simple circuit created and tested - able to output four different voltages – success

9. Last Week’s Action Items

10. This Week’s Action Items Item: Item: - Assemble the prototype Action: Action: - Wooden cover machined by end of class 11/07 - Other parts can be assembled and interfaced with microcontroller since circuitry is complete

11. This Week’s Action Items Item: Item: - Complete the computer program that interfaces the microcontroller, circuitry, and prototype assembly Action: Action: - Utilize programming flow-chart already created as guide for function - Assistance will be sought from Mr. Brownell in ISALL - Intended completion date: 11/12

12. This Week’s Action Items Item: Item: - Begin prototype testing and select desired voltage drop across solenoid for four different volumes Action: Action: - Two variable resistors per solenoid ( 0 – 3 Ω )  Able to create four different voltage drops through basic parallel and series wiring  Resistance value selection paramount in design  Current design values: R1 = 1 ΩR2 = 2 Ω  Four predicted voltage drops: 12.00 V, 9.82 V, 9.00 V, 6.80 V

13. Questions????