Setting the ATtiny85 Clock Speed

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Background The clock speed of the ATtiny85 can be set using one of several internal clock sources, or an external one (like a crystal oscillator) for full flexibility. The default setting utilizes the internal 8 MHz oscillator combined with a clock divider of 8, resulting in a 1 MHz clock speed. This clock divider can be disabled to run at the native 8 MHz. Additionally, there's another clock…

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