A system, comprising: a first power source (101; 201); a first load (103; 203) electrically coupled to the first power source (101, 201) via a first power rail; a second power source (102; 202); a second load electrically coupled to the second power source (102; 202) via a second power rail; and a failure detection circuit configured to: output a first signal indicating the detection of the failure of the first power source (101; 201) and output a second signal indicating the detection of the failure of the second power source (102; 202); and a current regulating circuit (112; 212) electrically coupled to the failure detection circuit, characterized in that the current regulating circuit (112; 212) includes: a first plurality of diodes electrically coupled in series with each other; a first switch electrically coupled in series with the plurality of diodes, the first switch configured to receive the first signal, wherein, upon receiving the first signal, the first switch is configured to allow current flow from the second power rail coupled to the second power source through the first plurality of diodes and through the first switch to the first power rail coupled to the first load wherein the first plurality of diodes is configured to limit the current from the second power source (102; 202); a second plurality of diodes electrically coupled in series with each other; and a second switch electrically coupled in series with the second plurality of diodes, the second switch configured to receive the second signal, wherein, upon receiving the second signal, the second switch is configured to allow current flow from the first power rail coupled to the first power source through the second plurality of diodes and the second switch to the second power rail coupled to the second load wherein the second plurality of diodes is configured to limit the current from the first power source, wherein, the first switch is connected in parallel with the series connection of the second plurality of diodes; and the second switch is connected in parallel with the series connection of the first plurality of diodes; and the first plurality of diodes defining a first potential drop between the second power source and the first load when electrical energy is flowing, and the second plurality of diodes defining a second potential drop between the second load and the first power source when electrical energy is flowing, wherein the quantity of diodes in the first or second plurality of diodes (215, 225) is selected on at least one of the following: the first or second potential drop is configured to correspond to a maximum voltage drop before detection by the failure detection circuit; the first potential drop plus the second potential drop is configured to exceed the maximum voltage drop before detection by the failure detection circuit; a maximum voltage drop is configured to exceed the first potential drop plus the second potential drop by less than a predetermined value; or a less than a maximum current is configured to allow flow after the failure detection circuit instructs the first or second switches to allow electrical energy to flow. a first power source (101; 201); a first load (103; 203) electrically coupled to the first power source (101, 201) via a first power rail; a second power source (102; 202); a second load electrically coupled to the second power source (102; 202) via a second power rail; and a failure detection circuit configured to: output a first signal indicating the detection of the failure of the first power source (101; 201) and output a second signal indicating the detection of the failure of the second power source (102; 202); and a current regulating circuit (112; 212) electrically coupled to the failure detection circuit, a first plurality of diodes electrically coupled in series with each other; a first switch electrically coupled in series with the plurality of diodes, the first switch configured to receive the first signal, wherein, upon receiving the first signal, the first switch is configured to allow current flow from the second power rail coupled to the second power source through the first plurality of diodes and through the first switch to the first power rail coupled to the first load wherein the first plurality of diodes is configured to limit the current from the second power source (102; 202); a second plurality of diodes electrically coupled in series with each other; and a second switch electrically coupled in series with the second plurality of diodes, the second switch configured to receive the second signal, wherein, upon receiving the second signal, the second switch is configured to allow current flow from the first power rail coupled to the first power source through the second plurality of diodes and the second switch to the second power rail coupled to the second load wherein the second plurality of diodes is configured to limit the current from the first power source, the first or second potential drop is configured to correspond to a maximum voltage drop before detection by the failure detection circuit; the first potential drop plus the second potential drop is configured to exceed the maximum voltage drop before detection by the failure detection circuit; a maximum voltage drop is configured to exceed the first potential drop plus the second potential drop by less than a predetermined value; or a less than a maximum current is configured to allow flow after the failure detection circuit instructs the first or second switches to allow electrical energy to flow.