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980Hz to 90.91 kHz range.
Only Arduino and code, no extra parts.
Accuracy better than 98%.
Linearity good in lower range, not so good in upper range.
Scaling to narrower range will improve linearity to excellent.
I don't even need this whole range.
I need only 10kHz range at most (for project i am working on currently).
But i just wanted to push it to limits and explore the behavior.
Stability almost perfect.
Small occasional jitters at some frequencies are due bad (dirty and greasy) potentiometer.
Also i put simple stupid bare wire from it to analog input.
Without any filtering.Comment
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