A block diagram is a representation of a system where the principal parts or functions are represented by blocks connected by lines that shows the relationships of the blocks. As per the power switch block control, a power switch controls the flow of power to an electric device. The switch has an on and off position, usually represented by a one (on) and a zero (off). As shown in the block diagram example, the power switch gets the power from either the battery or the external supply and passes it to the current measurement and interface multipoint control unit (MCU). This interface MCU passes the current to the Bluetooth device like nRF52832 that has an NFC antenna and matching network connected to an RF connector. EdrawMax and EdrawMax Online let you the best way to create power switch block diagram examples for your projects.