Instructables
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Picture of LED Music Portable
Circuit.gif
P1050932.JPG
P1050935.JPG
P1050936.JPG
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P1050938.JPG
tip31.jpg
All you need:

- LEDs or LED strip.
- Transistor TIP31.
- 3.5mm Stereo Jack Plug.
- 12V adapter.
- Plexiglass.
- Universal Circuit Board.

About the circuit:

The Right or Left (you choose which one) channel from 3.5mm Stereo Jack Plug is connected to the Base of the transistor. The Ground of 3.5mm Stereo Jack Plug is connected to the Emitter. The negative battery (12V adapter) lead (-) is connected to the Emitter too. The Cathode (-) of the LED is connected to the Collector of the transistor. The Anode (+) of the LED is connected to the positive battery (12V adapter) lead.
nerd74731 year ago
cool it needs to be longer though