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External timer in order to shutdown

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Posted by Denisj   (2 posts)  [Biography] bio
Date Wed 14 Nov 2012 03:36 PM (UTC)
Hi there all,
i just want to ask you a little question.

I'm a newbe and i finish to read some articles on gammon
about power saving of arduino.

I have a pulse counter tha i want to make it to save more power possible.
The problem is that i need a timer in order to know
the time between the last 2 pulses every about 5 minutes.

If i understant, if i power down the arduino, i lost the mills().
But if i use an external timer2 using a 32 KHz crystal
i can wakeup and have also the time.

First of all ... is this correct that i understand please ?
Thanks a lot
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Posted by Nick Gammon   Australia  (23,016 posts)  [Biography] bio   Forum Administrator
Date Reply #1 on Thu 15 Nov 2012 12:12 AM (UTC)
Can you please post Arduino questions to their forum?


You can send me a PM (on the Arduino forum) giving me a link to that thread if you like.

- Nick Gammon

www.gammon.com.au, www.mushclient.com
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Posted by Denisj   (2 posts)  [Biography] bio
Date Reply #2 on Thu 15 Nov 2012 01:41 PM (UTC)
Ok ... thanks in advance
Here is the post please

Thanks again
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