Arduino and PIR sensor in power off mode

Projects General Guidance
1

Hi all,

I would like to build this small battery powered project :

In idle time only the PIR sensor is powered on. When it detects motion, it starts arduino board which run some code and when the task is finished, it cuts off the power. Only PIR sensor stay on and listen for new events.

I don't want to use deep sleep mode. Better is lower power consumption. I measured my PIR sensor current is only 0.001mA (very good) and the high output signal duration is 2.4 seconds.

What components I should use between PIR sensor and Arduino to be able to realize this project?

2

How will you be powering the PIR sensor and the Arduino? What batteries? Which Arduino, which PIR sensor?

Is 2.4 seconds long enough for the Arduino to complete its task, or might it have to stay on longer than that?

3

Post an annotated schematic showing what you are proposing. Be sure to show the PIR sensor keep alive that will keep the Arduino going until all tasks are finished. Be sure to show all connections, power, ground and power sources.