I need to interpose a device between a USB host and a Propeller FLiP board that allows me to programmably adjust the nominal 5V USB supply voltage from zero to whatever the host is providing. This is to stress-test a system that uses the FLiP and a sensor that relies upon the FLiP's 3.3V buck converter for its supply. During the test, I need to maintain serial coms with the FLiP until it finally craps out due to a brownout reset.
Any recommendations to accomplish this?
Perfection is achieved not when there is nothing more to add, but when there is nothing left to take away. -Antoine de Saint-Exupery