Sound operated light source

The problem is the voltage signal at the headphone jack is probabaly much lower than needed to light an LED.

You might try a transformer and put the low voltage side in series with the audio signal. Then use the higher voltage side to drive the LED, if you can get a couple volts out of it. Use a low power LED that lights with just a couple milliamps.

-Bill

You did not tell us what device you are using, so it is impossible to state with certainty that it will not power the LED. It is doubtful that it will, but you can use the output to control another circuit that will power the LED. Is that what you want to do?

Ed

Maybe you could run software that displays a bar-graph of the sound output amplitude.

Bye. Jasen

Yes, I want the output to control another circuit that will power the LED. I am a novice and will be taking help from others , so would be thankful if you could tell me where I could find such a circuit.

See the following url:

Ed