LED VU meter circuit by transistor

The V.U. meter that works with the integrated amplifier circuit.The signal will sound, the audio amplifier circuit into VU meter circuit.And will show the level of the signal by flashing light. Rhythm of the music with LED.
When entering the power supply to circuit.The input VU meter is connected to the output of the amplifier.When one passes audio input diodes D1, D2, D3 and D4.This serves to divide the audio signal to gradually decrease, respectively.To forward to the individual transistors Q1-Q4.The strength of the incoming signal.Then the voice over R5-R8 limited bias current to flow from Q1-Q4 extend the pin C. To go to drive LED1-LED4 the timing light. And strength of the signal.The LED1 displays audio level light most.and LED4 shows the level signals, the most.

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