[Sound Level Indicator]

Hi Audioguru,

It's me again after a long time, but I want to know what do you use to supply the circuit with current in the +9 adapter? Can't I use a 9 volt battery? Because I don't have any 7.2 volt battery.

Jon

[Sound Level Indicator]

Hi AudioGuru,

It's me again. I want to know how many LEDs will light for how much dB if the range of the Sound Level Indicator is 45 dB to 95 dB? And another thing, who can it be 45 dB to 95 dB, the LM3195 only has 10 outputs in 3 dB steps for a total of 30 dB?

J.

[Sound Level Indicator]

Hi AudioGuru,

Thanks for the answer, I'll try with your infos... I'll come back for more questions if needed..

J.

[Sound Level Indicator]

Hi AudioGuru,

I would like to know what to do if I want the range to be from 30 dB to maybe 120 dB?
And can you provide the image of the back of you circuit board, to see how the connections are done?

J.