Abstract: An example on demand, variable supply fuel cell may include an anode coupled to provide electrical continuity for output power of the fuel cell, a cathode coupled to provide electrical continuity for the output power of the fuel cell, a membrane electrode assembly (MEA) disposed between the anode and cathode, the MEA coupled to generate the output power in response to exposure to a fuel, a plurality of capillary tubes to deliver the fuel to the MEA, wherein a first end of each of the plurality of capillary tubes is disposed adjacent to the MEA, and a plate isolator coupled to expose a second end of one or more capillary tubes of the plurality of capillary tubes to the fuel in response to a control signal, where the control signal is based on an amount of output power the fuel cell is to generate.

Abstract: An example on demand, variable supply fuel cell may include an anode coupled to provide electrical continuity for output power of the fuel cell, a cathode coupled to provide electrical continuity for the output power of the fuel cell, a membrane electrode assembly (MEA) disposed between the anode and cathode, the MEA coupled to generate the output power in response to exposure to a fuel, a plurality of capillary tubes to deliver the fuel to the MEA, wherein a first end of each of the plurality of capillary tubes is disposed adjacent to the MEA, and a plate isolator coupled to expose a second end of one or more capillary tubes of the plurality of capillary tubes to the fuel in response to a control signal, where the control signal is based on an amount of output power the fuel cell is to generate.