Go Down

Topic: Anyone done a sound reactive led/input (Read 2162 times) previous topic - next topic

zerocle

I would love to setup a sound reactive input on my arduino, aka if there is a beat high enough, the signal goes high/low. Ive done some googleing around and couldnt find anything. Would just a simple audio amp do? could you accomplish this somehow with a transistor? op amp?

unsped

my knowledge is limited, but an audio amp would work, possibly just a preamp.

i would look at a lm386 based amplifier, however you could also look at using a transistor as an amplifier they can certainly do that. then just read the voltage on the analog pins, you will get a value between 0 and 1024 that corresponds to 0-5v, you can set the threshold manually to turn the led off and on, similarly you could use pwm and pulse the led brightness accordingly :D


mem

There is a thread here http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1202056662/0
that covers a more complex application then you are looking for, but why not ask there for more info on the amplifier circuit he used to get microphone input detected by the arduino

Go Up