The scenario
Designing a soft latching power switch for a battery-powered ATtiny85 development board.
What is in this drawing
Read the decisions behind it.
01
Use P-channel MOSFET for high-side switching
02
Momentary pushbutton to initially turn on
03
Microcontroller holds power via N-channel MOSFET latch
Battery-powered embedded systems requiring a soft power switch with microcontroller-controlled shutdown.
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