I need an audio tone level monitor that can display levels from -50db to 0. I have an op amp circuit that I found that can take in my steady audio tone and convert it to a DC voltage that is displayed on an LCD. At 0db my LCD reads 620, at -15db I get 590, at -30db I get 112 and at -50db I get a value of 2.
If there at a way to use the log on the arduino to get a value of 0 for 0db, -10 for -10db then it would be much appreciated.
If there at a way to use the log on the arduino to get a value of 0 for 0db, -10 for -10db then it would be much appreciated.
Use the log? Do you mean the log function?
Yes, the log function. I suck at math so i'm searching now to see if something like this has been done before.