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Tip31c received

晶体管型号： TIP31C
制作材料： Si-NPN
性质： 低频或音频放大 （LF），功率放大 （L）
封装形式： 直插TO-220封装

datasheet: http://www.datasheetcatalog.org/datasheet2/0/00yr77xx8x32ksz116j6f4f6a07y.pdf

idea

I like starry night with billons of stars. Hong Kong is such a busy city. Light pollution is very serious. Light is everywhere at night. Even when I go fishing surrounded with mountains I can’t see many stars. I know that I can never see a starry sky at night in Hong Kong. So I decide to create one by myself.

I want to have a starry night. Then I think that will be great to make one with music. That inspires me to create a music box that uses light to emit sound that creates also a starry sky effect in a dark room.

The basic structure is a roll with holes. Inside the roll there will be LEDs .Then lights will go through the holes. When we roll it (there will be a handle) lights come through the holes will make an effect of starry night in a completely dark room.

Under the table there will be a web camera linked to a laptop. The web will have color detection that only detect black and white. When it detects white (there is light) it will emit the note of that position. (This will be done by action script).