11-05-2012, 04:36 PM
LIGHT MUSIC’ CIRCUIT
ABSTRACT
This circuit converts available light into music! All you are required to do is, keep it near a lamp, and the speaker starts emitting tones instantly. To change the tone for generating ‘music’, simply move your hand gently between the light source and light dependent resistor R1 (which is there in the circuit). The variations in the light produce different audio tones. Greater the light source, the higher the resultant pitch. Allowing the light to pass through your fingers is an excellent way of diffusing it.
The circuit consists of AC128 transistor, an audio transformer, AC176 transistor, loud speaker, also some sort of resistors and capacitors.