Hey,
I'm trying to make something that i can run off of my amplifier to make LEDs blink with my subwoofers. Does anyone know how I could make this happen? I saw some modules online that use a microphone but from what ive experienced those are unreliable. Any ideas would be appreciated.

 

I have a fairly complicated Sound Level Indicator project that has a microphone. Its LEDs display 10 levels of loudness from a pin dropping on the floor in the next room, to loud music.

Here is a fairly simple kit. You can connect up to 3 or 4 LEDs in series at each output if you want. It also works with the LM3915 IC.

Attached Images

Velleman VU meter kit.PNG (39.4 KB, 29 views)

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Uncle $crooge

 

It depends on what you men by bass and how powerful the amp it.

This circuit will roll off by 6dB/octave at frequencies higher than 330Hz and assumes the peak power from your amp is about 70W in to 8hm: or 144W in to 4hm: per channel.

Attached Images

Audio flasher.png (2.5 KB, 24 views)

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i have build one 10 years ago with simple op amp configured in comparator and was taking the audio signal from the rca output (tape out) of amplifier so sound level has no effect