Articulatingfolding head restraint assemblies that include modular brackets that function as modules and allow for platformability and customization by varying auxiliary components. One method, among others, comprises receiving a plurality of microcode images each configured to initialize hardware within an electronic device before the electronic device is booted up. Additional alternatives in an isolated converter having a transformer with a primary winding that is selectively coupled to the electrical power source includes sensing the primary winding voltage, for example, by directly sensing the primary voltage or by sensing the voltage across an auxiliary winding that is closely coupled to the primary winding.