project help?

[mannibis]

Hey

I'm in an EE intro class, and for our final project my partner and I want to make a circuit where we speak into a microphone and the amplitude of our voice will be reflected in a series of LED lights. For example, if we yell all 10 lights would light up, and if I speak normally, only 2 would. Any help would be appreciated. Thanks.

[Miles Prower]

I want to make a circuit where we speak into a microphone and the amplitude of our voice will be reflected in a series of LED lights. For example, if we yell all 10 lights would light up, and if I speak normally, only 2 would. Any help would be appreciated. Thanks.

So, basically, what you want is a VU meter. Here are a couple of possible designs:
With IC
Using BJTs

Remember: Google is your friend.  ;)

[hotwaterwizard]

We also have a project that would do the trick on our site! :o

http://www.electronics-lab.com/projects/audio/035/index.html

http://www.electronics-lab.com/projects/audio/029/index.html