If I remember correctly 32MHz but that was with an oscillator

not a crystal. Going that high will introduce other issues, search

on arduino forums ...

On Sun, 8 Nov 2020 at 19:01, Arv Evans <arvid.evans@...> wrote:

If changing the resonator (crystal in Arduino TINY units) how high can we?

go?? I have tried with 27 MHz but some AVR processors do not like to run?

that fast.

_._

On Sun, Nov 8, 2020 at 10:54 AM Dragan Milivojevic <d.milivojevic@...> wrote:

The same way we used to overclock the CPUs in the

386 era, you replace the crystal :)

Question is how one goes about overclocking an Arduino?? There?

seems to be no obvious way to change the internal clock rate from?

being tied tightly to the crystal frequency.? Some more adept processors?

Virus-free.