I recently bought the Arduino LilyPad and wanted to start working on a fun project that creates an "LED picture" on a tshirt. I'll need a bank of LED's for this (the idea is to create different patterns by turning on certain LEDs in the bank). I see that the Arduino sources very little current so I want to use it to switch a transistor on and off at a high frequency perhaps using the PWM module). Has anyone ever tried this? Will this work?
Also, I want to use the Lily buzzer to play music? Is this possible with the current setup?
Thanks in advance for your help.