Okay, so I've worked a lot with making LED's pulse to music and light. I've used LM3915 IC's and made VU meters and have also used basic transistors that would turn on when receiving an audio-signal from an MP3 player, LDR or stereo/laptop. I plan on making a temperature-sensitive unit, using a thermistor eventually, but for right now, I want to make a similar unit with a basic electret microphone. I've tried many schematics in textbooks and a few found on THIS website, but nothing has worked for me. It frustrates me, cause I'm usually pretty good at looking at a circuit and improving it for my own needs. I'm not sure what i'm doing wrong (it's probably just from my lack of experience with microphones and op-amps).
Ideally, I just want the input going into the mic to be able to turn a single LED on and off (varying with the noise, not a simple HIGH or LOW).
So if anyone has any helpful tips or hints, that'd be great. Circuit diagrams are always nice too . I'd like to make this from transistors, but I also have a few LM386N-1 op-amps in my possession. Thanks. -Joe
Ideally, I just want the input going into the mic to be able to turn a single LED on and off (varying with the noise, not a simple HIGH or LOW).
So if anyone has any helpful tips or hints, that'd be great. Circuit diagrams are always nice too . I'd like to make this from transistors, but I also have a few LM386N-1 op-amps in my possession. Thanks. -Joe