Talking Arduino Halloween Skeleton

Step 6 One other thing...

You need to get a voltage reading of what the power of the audio is.  What this allows is whenever the volume on the sound gets loud enough, it opens the mouth of the skull.  Then when the voltage drops, the servo closes the jaw.  Fairly simple.  We'll attach a wire from a resistor and plug that wire into one of the inputs on the arduino so we can read it in the code. 

Comments

[mbrameld]

Might also be cool to use the voltage from the wav shield to set how wide the mouth opens. Open the mouth wider as the sound gets louder. I'd have to try it out, but in my head at least it seems like this would make the mouth movement a little more natural.

[samseide]

I totally get what you're saying.  It may look better.  Try it and let me know!  haha.

[Lasrin]

A trim pot might have been better, taken off the other lead of the resistor.  This way you could adjust the sensitivity to the audio.

[samseide]

you can still adjust the sensitivity using the code by just telling it at what audio level the mouth should open.  So you could do it as a hardware or a software solution.