I trying to write a sketch which runs once a second. I can't use millis because i'm already using it within the once e very second code. This will be my first attempt at interrupts. I assume (hah) I can connect the SQW pin to pin 21 ( I'm already using pins 2 and 3). I need to know how I enable the …

Using the RTC SQW pin to interrupt the Arduino

Topic		Replies	Views
interrupt for Arduino UNO Programming	5	997	May 5, 2021
Question about setting internal timer and interrupts Programming	10	2282	May 5, 2021
Waking Arduino once per minute on timer based int Syntax & Programs	17	11805	May 6, 2021
Interrupt Generale	5	3713	May 7, 2021
Interrupt question Programming	16	2346	May 5, 2021