Hi !
I have been using pin 9 for PWM and require at least a range of 4 octaves .
I'm using a linear 100k pot to analog pin A0 to vary the frequency.
The ADC is 10 bit and has a resolution of 1024.
the results are as follows.
110hz = 0volts
220hz = 0.625volts
440hz = 1.25volts
880hz = 2.5volts
1760hz = 5volts.
That's as expected .
This is exponential and causes very small changes in the second half of the pots travel.
In short a PITA when trying to tune a lower frequency.
This is more like hertz/volt.
Is there some way i can make the ADC deliver a 1volt/octave response?
Thanks for listening.