A fuel cell device includes a housing containing a fuel processor that generates fuel gas and a fuel cell having electrodes forming an anode and cathode, and an ion exchange electrolyte positioned between the electrodes. The housing can be formed as first and second cylindrically configured outer…
Circuits and methods for supplying a temporary power supply at a predetermined voltage are disclosed. A circuit includes first DC/DC voltage converter (140) that receives an input from a power supply (110) at a first voltage level (Vin) and generates an output at a second voltage level, higher than…
A microfuel cell includes a substrate and a plurality of spaced-apart PEM dividers extending outwardly to define anodic and cathodic microfluidic channels. An anodic catalyst/electrode lines at least a portion of the anodic microfluidic channels, and a cathodic catalyst/electrode lines at least a…
An electronic device battery pack for a battery requiring cycling to prolong lifetime is divided into at least two parallel cells for which the charging state is automatically maintained. When external power is available and one or more cells is substantially discharged, the substantially…
In a fingerprint sensing system usable as a command interface a user's fingerprint pattern is recognized and compared to previously stored reference patterns. If the fingerprint pattern matches a previously stored pattern, the user is permitted to enter commands via the same interface system. In…
A system and method regulates an alternator charging system and includes a memory for storing and regulating voltages used at specific temperatures for the specific alternator charging system requirements of an alternator. A circuit generates a digital signal indicative of both temperature of a…