I am using a Adafruit Power Boost like this to charge a 3.7V LiPo and Also boost it to 5V when using as a standalone based on battery power : PowerBoost Schematic
If you notice this module shuts down when the Enable pin is grounded. Now i want to be able to do this with a solid state device ( i know its pretty easy with a mechanical relay ).
I am using this module to power a Mega2560 board and the board sleeps most of the time to save power.
I want to be able to use a MCU pin to shutdown this module when the MCU goes to sleep without using a mechanical relay. Any ideas ??