how to turn on arduino uno using real time clock

Projects General Guidance
1

Hello

Is it possible to turn on Arduino uno using real time clock? if yes can someone please share me the details how to do it.

2

For some general ideas there are several videos and tutorials to be found with a Google search on;

"how to turn on arduino uno using real time clock"

3

srnet:
For some general ideas there are several videos and tutorials to be found with a Google search on;

"how to turn on arduino uno using real time clock"

I didn't find proper solution. it will more grateful if you provide me circuit connection and code

4

I doubt anyone will do it for you unless you paid !

Why bother turning it off anyway ?- just send to sleep and wake up from the real time clock . If you are powering a clock , the tiny extra current for a sleeping Arduino won’t hurt much .

5

hammy:
Why bother turning it off anyway ?- just send to sleep and wake up from the real time clock . If you are powering a clock , the tiny extra current for a sleeping Arduino won’t hurt much .

In sleep mode it consumes more Amps. in my project i want device to work minimum of one year so i was thinking to make device turn off. usually device turns on twice or thrice a week. keeping plugged in always its waste of using battery.

This is the reason i want to make device turn on only when it is necessary using Real time clock.

I will be more grateful if someone helps me

6

If done properly, an Arduino can run for years on two AA batteries. This tutorial shows you how.

7

Deep sleep takes a few uA. Very little current. Of course this is provided you're not using an Uno or so. Start with a Pro Mini, then remove (break it) the power LED. Or use a standalone ATmega chip.

Switching it on using an RTC is possible, you have to connect the wake signal to a high side switch, like a p-mosfet. But I doubt you can save much if any power that way.

8

Tie the RTC "alarm" output to the AVR's RESET.

Note that an Uno has so many components that consume power that there is little point to the deeper sleep modes of the CPU.

9

It you wanted to do it that way , it’s easy to cut out the regulator ,the usb chip and power led on a UNO/Nano.
Or google minimal Arduino.

10

Is this for a school assignment ? 4 posts this already on the forum about RTC's and turning things on / waking things up.

11

Only 4 ?

And not using Google maybe.