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timer

PostPosted: Wed Jul 31, 2013 9:06 am
by service5
Is it possible to set a timer that will turn on an led after 2 years have passed.

I'M LOOKING TO MAKE A SETUP THAT WILL TURN A LIGHT ON AFTER 2 YEARS..MEANING THAT UP UNTIL 2 YEARS I DON'T WANT ANYTHING TO HAPPEN BUT WHEN IT REACH'S THE 2 YEAR YEAR MARK I WANT A LIGHT TO COME ON AS A REMINDER...IS THIS POSSIBLE???

Re: timer

PostPosted: Sun Aug 11, 2013 9:50 pm
by vegipete
Something like that is in principle easy but there are a few tricky parts I can think of.

One is how accurate you need the 2 years to be.

Another is an issue of reliable power for the entire 2 year duration. If you lose power, you
loose your timer, unless you design something with battery back-up. And if the device is to
be battery powered, ensuring the battery lasts that long will require careful power management.

Maybe you could program your cell phone to do the job?