I'm working on that cool project that is power efficient .
I'm working on a project that auto power the arduino at a given time and keep it on for less than a minute then it should switch off automatically too .
I'm using an external circiut for sending a signal for the switching on purpose ( DS3231 board ) http://www.play-zone.ch/en/combo-breakout-mit-ds3231-temperatur-zeit-24c32-memory.html
So I am trying to build up a circiut that when it receives a signal from the DS3231 board it latches the signal for a while to autopower the arduino board then it switch off again saving much much battery power .
I built up that one but still struggling to make it work.I am worried that it will waste more power than it saves due to the 100 ohm resisters.Would anyone have a proper circuit ?
i/p is where I connected to the SQW pin of the DS3231 board and +5v is connected to Vin pin in the arduino and GND to the GND pin as well in the arduino board
any help ??