How do you make a sound activated switch?
So basically I'm looking to make a circuit that detects a (preferably adjustable) level of sound and completes another circuit and keeps that circuit completed until the sound level drops. I've looked around on Google but I cant find any momentary circuits. I find things like clapper kits and stuff that switches something on and keeps it on. I want to use this on my paintball loader so when it detects the sound of the gun firing it activates the motor. (like a Halo or some other high end loader) The loader is a Viewloader force with the ON-Demand jack.
+One last thing this cant be too huge because I want to be able to velcro it to the side of my loader. If you know of a circuit like this or have a picture or a link That would be great; thank you all in advance :D