I'm about to start working on a project that involves a long string of LED's used to light up the keys on a full piano. I plan to control what keys are lit up using software on my PC. This will be my first Arduino project, and I've looked at tutorials like this:http://www.arduino.cc/en/Tutorial/ShiftOutFor driving many LED's. In this care I'll probably have around 50-60 LED's I want to control. Am I best daisy-chaining these LED shift register chips or is there a better way? If I should use these chips, where's the best place to buy them? (Are there any free samples)?Thanks so much.
It will be used to show what notes to play.
How many leds can I use with this circuit from http://www.arduino.cc/en/Tutorial/ShiftOutin the website, it shows up to two sets, but is there any problem of using more? what about the mA usage, will arduino support all that?