PIANO PROJECT NEED HELP!!

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i working on project grade 10 computer science , piano has 7 keys using capacitative sensor , supposed teach songs twinkle twinkle little star illuminating led corresponding key , playing tone on speaker. also, random scales part timed , have press keys fast can light up.t unfortunately, have come few problems.
1. ran out of outputs , have use shift register. have no idea on how control each of outputs.
2. when game starts want there 2 options song , random scales using randomseed have not found way them pick option. think can user input typing or them pressing key not sure.
3. pretty new on arduino helps.

finally using arduino uno , why short pins because have 1 gnd 1 speaker , rest key inputs.

thanks,

first of all, don't shout! please change title.

1) let me google you but! if count don't see way ran out of pins. count 7 keys, led each key makes 7 + speaker. makes total of 15 pins. arduino uno has 20...

2) why not? design it, decide use select something.


Arduino Forum > Using Arduino > LEDs and Multiplexing > PIANO PROJECT NEED HELP!!


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