Minimum cost sound control music color light circuit

Published:2011/7/25 1:43:00 Author:Christina | Keyword: Minimum cost, sound control, music, color light | From:SeekIC

The color light controller circuit is as shown in the figure, the resistance step-down half-wave full-wave circuit is composed of the r1, r2, d and c, it outputs the 3V DC current to the control circuit of SCR. The piezoelectric ceramics htd is used as the sound-electric transducer, you can make the bg collector output the low level by adjusting w, the scr cuts off, the color light turns off. When the htd receives the acoustic signal, the electrical level of the bg collector will rise up, the scr turns on, the color light can flash with the music rhythm of the indoor radio. w can be used to adjust the sound control sensitivity, when the w is from high to low, the sound sensitivity is from low to high, when the w is too low, the light will turn on, so the circuit loss the sound control function.



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