Arduino Forum

Using Arduino => Project Guidance => Topic started by: Afanasjevas on Jan 05, 2013, 03:18 am

Title: How long can Arduino Uno work without switching it off?
Post by: Afanasjevas on Jan 05, 2013, 03:18 am
Is it safe to run Arduino indefinitely? Does it ever need to be switched off?
Title: Re: How long can Arduino Uno work without switching it off?
Post by: retrolefty on Jan 05, 2013, 03:22 am

Is it safe to run Arduino indefinitely? Does it ever need to be switched off?


Yes, it can be run continuously with no problems. Indefinitely is not likely, as our Sun will be exploding in the future and taking the earth with it.  ;)

Lefty
Title: Re: How long can Arduino Uno work without switching it off?
Post by: JChristensen on Jan 05, 2013, 04:52 am
Most of my projects are intended to run continuously, I don't seem to buy a lot of power switches these days! ;)
Title: Re: How long can Arduino Uno work without switching it off?
Post by: kuhntucker on Jan 05, 2013, 05:48 pm
If you use the millis() or micros() functions you will need to consider that they rollover and start again at 0 periodically.  The millis() function is good for about 50 days before a rollover, the micros() function about 70 minutes. 
Title: Re: How long can Arduino Uno work without switching it off?
Post by: Grumpy_Mike on Jan 05, 2013, 05:56 pm

If you use the millis() or micros() functions you will need to consider that they rollover and start again at 0 periodically.  The millis() function is good for about 50 days before a rollover, the micros() function about 70 minutes. 

The roll over will be no problem if you follow the techniques in the Blink without delay example.

Quote
our Sun will be exploding in the future

I think exploding is a bit too dramatic, it is more of a slow expansion that will see the Earth being swallowed up. It happens over many Melania so it won't be sudden, still a bit catastrophic mind you. 
Title: Re: How long can Arduino Uno work without switching it off?
Post by: Khalid on Jan 06, 2013, 05:41 pm
The great Zeusarus has already diminished taking it solar system engulfed by expansion and then burst out all the grey matter spreading and moving toward the Earth at the speed of photon with infinite mass... Seems the sun will have no life for decay and expansion.. :smiley-mr-green: