Looks like a neat PT. BTW, Green is 4.7v.
FYI - I'd suggest a 2 amp or better AC->USB adapter instead of the computer USB. The general consensus (at least on this forum) is:
1) Why tie up a computer USB port just for power?
2) Why risk a short in the wire or something that could damage the port?
3) Why stress the port with max amps all the time? Vaping is a lot of on-off-on-off all day long.
Some boards will handle 1.5 amps... but even that is pushing it with a true 5 volts and a 3.0 ohm atty/carto (1.7 amps)
Just