I have a small project with arduino UNO R3 + RTC clock DS3231, that control through a relay a electrovalve (12V).
I would like to use the entire circuit on battery.
The electrovalve (a small motor) has a consumption of 500mA and will be active 4 times a day for 15 second.
I have a 7Ah battery, and I had calculated that my system will work only around 34 hours with it... is there any way to optimize circuit consumption ?
Thanks for any suggestion !