Do you know how to record a change in value of a analog pin immediately ?

Neil Swiff asked Nov 16,2020

I'm using an arduino and the value in the analog pin needs to be monitored constantly at all points in the program . I’m aware of using a interrupt pin but it will only work when a pin goes high or low which is not sufficient.

The best method I could think was use a timer and fire it in a few milliseconds and monitor the value in the ISR. Is there a better method for achieving this ? Like detect a change in the analog pin and then the program goes to the ISR?

Thanks for any help.

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