Here is how to build a light organ, an electronic device which automatically converts an audio signal (such as music) into rhythmic light effects

Step 1: Materials

1. LED lights 
2. Transistor BD233 (or similar one) 
3. 12V adapter (or battery)
4. Cable from headphones
5. Electric wires 
6. Acrylic glass 
7. Sand paper
are there several things wrong with the circuit? <br> <br>the base of the transistor ought to connected to the audio <br> <br>it needs a 'strong' audio signal to work ( over 0V7 )
ops, also <br> <br>if the VD of the LEDS is more than .say...... 2V8 the LEDS will not light

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