LED's flickering to music PT2

Discussion in 'General Electronics Chat' started by Booocubs, Feb 24, 2012.

  1. Booocubs

    Thread Starter New Member

    Dec 11, 2011
    14
    0
    Audio Guru helped me out with a circuit, and here's the final look of it;

    [​IMG]

    I plugged in the 12V DC power supply and all 36 LED's turn on. When I plug in my phone to the audio in, the LED's aren't flickering. Any thoughts?
     
  2. #12

    Expert

    Nov 30, 2010
    16,269
    6,781
    This chip needs positive AND negative voltage supplies. With no input, the output of this circuit is very close to zero volts and it's only natural that 12V through the LEDs will conduct current to a zero volt output pin.
     
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