ok


reversing the lm386 op-amp by ataching a microphone instead of the speaker and a few diode and pot modifications you CAN reverse its function to control resistance.


now my question is.... can you turn that resistance into a bar graph led arrey?


i think a 4017 ic is good for the job..... but i dont want that 9 off, 1 on led...


i want them to always increase in number


soo if the sound is moderate there are 4/5 leds on and if the sound is high there are 9 leds on

 

Hello,

I think that will not work.
A 4017 is a counter and not a volt (or resistance) meter.
A LM3914 / LM3915 will do the job as a VU meter.
Take a look at the datasheets:

Greetings,
Bertus