Sound activated LED?
Hi, need help with my electronics project. I would like to light up a set of LED's (about 20) in response to a microphone input using a 9V battery source. I have searched the internet for schematics but no luck. I only found LED's thatlight up at certian frequencies or light up depending on volume. All I need is to light up 20 LED's whenever a sound is detected on the microphone! Please help!