I've been trying to figure out how to set this up. I want to be able to read current or wattage of 3 different DC lines (3v, 5v and 12v) and displaying them to an LCD screen.
This will be used in conjunction with my LCD voltmeter and project Power house. I want to be able to push a button and switch the display between volts and current or volts and amps or maybe even all 3.
I've been looking into precision resistors and also hall effect sensors. what would be the best way to go about hooking this up?