NOVELTY - Hydrogen generator comprises: housing; a liquid reservoir containing a liquid reactant and disposed within the housing; a reaction area disposed within the housing; and a pump configured to pump the liquid reactant from the liquid reservoir, through a liquid flow path to the reaction area, where the liquid is capable of reacting within the reaction area to evolve hydrogen gas.    USE - The hydrogen generator is useful in a fuel cell system (claimed) that is used to power portable consumer electronic devices such as communications equipment, portable computers and video games.    ADVANTAGE - The hydrogen generator: has a simple design and low cost; is reusable; and utilizes pump that exhibits compatibility and reliability.    DETAILED DESCRIPTION - Hydrogen generator comprises: housing; a liquid reservoir containing a liquid reactant and disposed within the housing; a reaction area disposed within the housing; and a pump configured to pump the liquid reactant from the liquid reservoir, through a liquid flow path to the reaction area, where the liquid is capable of reacting within the reaction area to evolve hydrogen gas, the pump is a diaphragm (128A) pump and comprises a pump chamber (132) having a volume, a first diaphragm defining a portion of the pump chamber, a liquid inlet path to the pump chamber with an inlet valve (136) disposed in it, the inlet valve biased against a second diaphragm in a closed position, a liquid outlet path from the pump chamber with an outlet valve (138) disposed in it, the outlet valve biased against a third diaphragm in a closed position, a motor (114) with a rotatable shaft, a first cam, a second cam and a third cam, all disposed on the rotatable shaft, a first pushrod in contact with the first cam and configured to cooperate with the first cam to reversibly displace the first diaphragm to reduce the pump chamber volume, a second pushrod in contact with the second cam and configured to cooperate with the second cam to reversibly displace the second diaphragm to open the inlet valve and a third pushrod in contact with the third cam and configured to cooperate with the third cam to reversibly displace the third diaphragm to open the outlet valve, and all valves in the liquid flow path between the liquid reservoir and the reaction area are mechanically operated valves. An INDEPENDENT CLAIM is also included for a fuel cell system comprising a fuel cell stack and the hydrogen generator.    DESCRIPTION OF DRAWING(S) - The figure shows a front plan cross sectional drawing of a pump with the inlet and outlet valves closed.    Motor (114)    Diaphragm (128A)    Pump chamber (132)    Inlet valve (136)    Outlet valve (138)