1. Contextual Challenge (the problem that needs solving)

 

Creating music is a great way to entertain yourself, friends and family. However, musical instruments are very expensive and can be complicated to play. Developing a simple, and cost effective musical instrument would solve this issue.

2. Specification (the list of criteria than needs to be completed to solve the problem)

Must

Should

Could
Be able to play multiple different tones. Be able to play a large range of tones. Be personalised to appear like an existing musical instrument.
Have at least 6 switches. Be loud enough hear from a distance of at least 4 metres.  
Use a 555 timer IC.    
Use a loudspeaker