Re: LED bargraph mWattmeter ......Very useful for a uBITX or BITX40.
Take a look at this project for enough good ideas to get you started. Uses the 8307 and the 3914
Years ago I built something similar (not using the 8307)
The 3914 is a ratiometric device, so if you feed in a forward power signal as its reference, and a reflected power signal as the measured quantity you'll get a rudimentary SWR display