A friend of mine has asked me for some help with a little audio-visual project he's been working on lately. Basically, he just wants to convert his voice into pulsating lights. He's got one of these, a Shure SM57 dynamic microphone, which requires no power.
Now I am no sound engineer but this one did seem JUST simple enough for me to tackle. All the circuit needs to do is detect fluctuations in voltage. So this is what I came up with. Not particularly sophisticated mind you but possibly (?) good enough to get the job done.
The whole thing runs off of 5V and the op amp is in "single supply" configuration. The AC signal represents the mic, which produces voltages in the millivolt range. The output here is a single LED but just think of it as a 5V output driving the actual lighting display.
Now one thing that does worry me is that the big resistors would probably have to be PERFECTLY matched, otherwise the circuit may not work at all. Besides that it almost just looks too simplistic. Sure it runs in the simulator...but will it really work once everything is actually put together?
Now I am no sound engineer but this one did seem JUST simple enough for me to tackle. All the circuit needs to do is detect fluctuations in voltage. So this is what I came up with. Not particularly sophisticated mind you but possibly (?) good enough to get the job done.
The whole thing runs off of 5V and the op amp is in "single supply" configuration. The AC signal represents the mic, which produces voltages in the millivolt range. The output here is a single LED but just think of it as a 5V output driving the actual lighting display.
Now one thing that does worry me is that the big resistors would probably have to be PERFECTLY matched, otherwise the circuit may not work at all. Besides that it almost just looks too simplistic. Sure it runs in the simulator...but will it really work once everything is actually put together?