ATtiny85 1 Mhz Clock

Projects General Guidance
1

Hi,

I would like to run a simple programme that keeps time for just one hour then blinks a led at the end of the hour. I would like to run this on a Attiny85 @ 1Mhz (CR2032 powered) and be as accurate as possible for the one hour it runs.

Would attaching a crystal and caps to pins 2 & 3 improve the accuracy?

Thanks

2

Yes, but you will need to reprogram the MCU to configure the crystal oscillator and timing chain.

3

You can adjust your delay time to get closer to exactly one hour, post your code.

[code] your code here [/code]