I am trying to build a battery powered device that runs on 2 CR2032 coin batteries. I want to be able to press a button to activate it, then it does its thing and powers itself off.
So I put the button switch between the battery ground and circuit ground and put a MOSFET across it. Push the button, PIC wakes up and sends a HIGH signal to the MOFET gate to hold power on when the button is released. So far so good.
Now when the PIC has completed its task I drop the MOSFET gate line low in code, but the circuit does not power down. A voltage remains on the driver line and I'm not sure why.
Anyone have a working solution to this problem. I am open to anything!
Guy
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