So, i just had an idea to make a vu meter.
I searched a bit online, and found out that a lot of people are using the LM3915 chip.
But my question is how do i make the LM3915 react to a spesific hertz?
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So, i just had an idea to make a vu meter.
I searched a bit online, and found out that a lot of people are using the LM3915 chip.
But my question is how do i make the LM3915 react to a spesific hertz?
Greetings,
Band pass Filter method will do the job.
Do you only wish to make a VU meter or Just want to make led's dance with music?
Here are two videos, I made this thing for a friend he asked me to make led's dance according to the music. If you wish to make led's dance, you will need condenser mic, capacitors, few resistors, transistor etc.
Take a look:
These LED's was on a breadboard, it was a testing circuit, the final circuit was on a PCB. Also, you can make different color LED's to respond to different sound levels. Advantage of these units: as their input is a condenser mic so they can be installed away from signal or no input signal required. They works on sound coming out of the speakers 
.
Good Luck 
