Ok so my brother bought some tiny ipod thing(really not ipod fan), and it had this tiny cute box, in which my small breadboard fits perfectly. So I want to make a light sensitive music (more like annoyance) box. Any ideas or suggestions on how I should do it? This is my plan, but I am pretty bad at this. So in general what I want is that the more light hits the photoresistor the louder piezo speaker starts to sound. And when there is almost no light you can barely hear it. I am planning to use 555 chip, but if there is anything better to use please tell me. It does not have to contain 555 chip, I just want some kind of idea that will work.