Looking for the best way to run LEDs off of sound..

Projects General Guidance
1

I am building a robotic head with moveable eyes and such. I am looking for the best way to run a set of LEDs off of sound. Having the LEDs like a mouth. I am having trouble deciding on how I will set this up.

  1. What is a good playback device for the UNO? I am certain it would have to be a SD card board.
  2. What is the best way to drive LEDs off of this board?
  3. Is there a board that can amplify the audio signal specifically for LEDs?

I know I am missing alot of questions here. But any input would be greatly appreciated.

2

I see that this maybe in the wrong forum, but would like info on this.

Thanks

3

What you need is a wave shield to generate the sound and the a few shift registers to control the LEDs.
The difficult part will be the software that connects the two.

4

Was thinking about getting this: http://www.sparkfun.com/products/11029, the Mp3 trigger.

Then split the audio out to a speaker and the other to an amp to drive the LEDS. But, don't have a large knowledge of audio..

5

You could run the audio through a spectrum analyzer chip to tell the LEDs what to do:

http://nuewire.com/info-archive/msgeq7-by-j-skoba/

There's also a DSP library for the Arduino floating around....

Good luck!

6

magagna:
You could run the audio through a spectrum analyzer chip to tell the LEDs what to do:

http://nuewire.com/info-archive/msgeq7-by-j-skoba/

There's also a DSP library for the Arduino floating around....

Good luck!

Thanks!