My PC displayed, Arduino based Voltage Meter.

if you are struggling with converting American Wire Gauge (AWG) to something more easy to deal with, check out this handy conversion table

Raspberry pi vs Micro Bit - The BBC micro:bit is a different beast to the Raspberry Pi, where the Raspberry Pi is a superb fully functioning LINUX computer that you can plug a keyboard, mouse and monitor into the micro:bit is more like a standalone sensor board that you can program to do very specific tasks. The Micro Bit Language, Where to buy the Micro:Bit, MicroBit Specification and more...