1. Project Design
Updated: 9/25/2010

2. Things to think about Triggering mechanism Special effect type
How to release the ball
How to load the ball
Special effect type
Sound, Music
How loud?
Use speaker?
Special effect trigger
Before throwing
After triggering

3. Things to think about Power for throwing machine Ball Throwing angle
Where is the power coming from?
Battery, Wall, solar
Ball
Weight, size, color
Throwing angle
Roll, projectile motion, bounce
How far? (still feet)
Switch type
Band-based, foot-based, size, color, material
Communication mechanism
Wired, wireless

4. Music Player
You can use ebay:

5. Ball Type
Beach Ball

6. Diameter Steel Ball Bearing Roller

7. Cable Roller

8. Dot-It

9. Push Buttons

10. Wireless Chime Kit

11. 5-Jack Adaptor with Cable

12. Speaker Mount

13. PVC Pipe/Fittings