Hey there, I'm using an arduino to take as an input a square wave, calculate the frequency and reproduce a sine wave with half the frequency. I didn't get it to work, I even put it through 3 RC low pass filters (after the voltage follower), and the signal was still a litlte fuzzy, like I was doing it to a square wave. Why isn't the sound clear?
About the voltage follower, I understand that it's made to limit the current, since the R-2R (in some scenarios?) would have low impedence, I just don't get how it affects the signal. Is it just a current limitator, or does it have any influence in the signal?
I'm using 4.8k and 10k resistors.
And this is my sine lookup table.
About the voltage follower, I understand that it's made to limit the current, since the R-2R (in some scenarios?) would have low impedence, I just don't get how it affects the signal. Is it just a current limitator, or does it have any influence in the signal?
I'm using 4.8k and 10k resistors.
And this is my sine lookup table.