[Ether]

Fun fact:

the average of 1 volt at 20% duty cycle is 0.2 volt;
the RMS is 0.44; RMS is ~2.23 times the average.

same as above, only 40% duty instead of 20%:
average=0.4; RMS=0.63; RMS is ~1.58 times the average.

same as above, only 60% duty:
average=0.6; RMS=0.77; RMS is ~1.29 times the average.

same as above, only 80% duty:
average=0.8; RMS=0.89; RMS is ~1.12 times the average.

same as above, only 100% duty:
average=1; RMS=1; RMS is equal to the average.