Karaoke light controller circuit (1)

Circuit working principle: The controller consists of three parts: power circuit , control circuit and audio amplifier . The power circuit consists of VD1~VD4, R1,, C1, LED 1 and LED2, etc. The 220 V alternating current is rectified by a VD1-VD4 bridge and then outputs full-wave pulse direct current for use by the four-way light bulbs A, B, C, and D. This pulsed DC also undergoes voltage reduction and current limiting to make LED1 and LED 2 emit light.