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Author Topic: How to make a LED shine with the output current of a magnetic microphone?  (Read 375 times)
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Hello Everybody!

I gonna introduce myself!
I'm studiying how to build guitars.
For the end of the year project, I want to make an electric guitar. But an unusual one. That's the problem.
I mean, there is the situation. I want that, when one of the magnetic microphones get a signal, the LED stripe is turned ON.
And I need your help:
I know when a magnetic microphone gets a signal, it produce a (really weak) electric current.
But I don't know how to make this LED stripe shine at this only condition.

I looked at peak meters and stuff like this, but I'm a big noob in electricity/
In some forums, I saw mentionned audio sensors.
But I thought I could do something easier, like amplifying the current out from the mic then put that current into the LED so it will light up,
but I have no idea how to do this.
HELP, PLEASE
I'm sorry for the possible mistakes, I'm french.

If anyone could offer any help/advice, that would be really appreciated!
« Last Edit: August 16, 2012, 07:42:12 pm by AwfullJ » Logged

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I think depending how you wanna do this, a msgeq7 ic would work well,
it would take the total output of the mic/mics and it outputs a multiplexed value for 7 audio bands,
you can then tke those vlues and light up leds according the strengths with pwm
I've used it for 3 channel light shows to general music but I think it would work well in your case
if you need code I got plenty
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Quote
like amplifying the current out from the mic then put that current into the LED so it will light up,
Yes you need an operational amplifier sometimes called an op-amp.
http://en.wikipedia.org/wiki/Operational_amplifier
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