RF DIGITAL QRP WATTMETER
Here is a good QRP project for any
a wattmeter with 1 watt and 10 watt input levels.
It is also a DC voltmeter for up to 20 vdc.
my EAGLE board layout:
For complete instructions / PIC hex files
see the website of the designer, OZ2CPU:
Photos of the OZ2CPU Digital wattmeter project: