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Audio sound controlled lights

2014-12-20 06:17  
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This audio controlled lights circuit design is used to control the brightness of the lights attached to it in sync with the sound that is being capturated by its microphone.Usually, sound controlled lights are just connected in parallel with the loudspeakers.This is an on-off control with isolated, low voltage input. Since the switching action is very rapid, compared with the response time of the lamp and the response of the eye, the effect produced with audio input is similar to a proportional control circuitIf the input signal to the  SCR  consists of phase-controlled pulses, full wave control of the lamp load is obtained.Audio light modulations add to the enjoyment of music during functions organised at home or outdoors. Presented here is one such simple circuit in which light is modulated using a small fraction of the audio output from the speaker terminals of the audio amplifier.
 

Audio-controlled lamp