Hi all! I'm working on a self-contained project that will be battery powered. I want it to come "on" when the user presses a pushbutton, but then turn "off" again after, say, 10 minutes of inactivity. This device must be very power conservative, because it won't be very feasible to swap out the 9V…

ON and OFF (and sleep?)

Franklin September 22, 2008, 1:46am 3

Place a relay on the power pin to cut power when de-energised and a switch to energize it to start.

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