The mainboard should support current /voltage monitoring for power calculations. If we're pitching this as a educational platform, the ability to read off current draw for the LaunchPad/digital sensors would be useful.
The power sensor is ideally an I2C or SPI slave, to save on pin count.
There are two ways to implement this (based on research).
Dedicated IC (IN226 and its three channel version). 2.26 @ 1 from Digikey
Single AVR (1.88 @ 1 from Digikey, minimal-to-no-BOM) or PIC IC.
The mainboard should support current /voltage monitoring for power calculations. If we're pitching this as a educational platform, the ability to read off current draw for the LaunchPad/digital sensors would be useful.
The power sensor is ideally an I2C or SPI slave, to save on pin count. There are two ways to implement this (based on research).