Described here is a novel arrangement of electronically-actuated wax valves for “Lab-on-a-Disc” (LoaD) centrifugal microfluidic platforms. A LoaD platform, with an integrated silver screen-printed layer, operates via a battery-powered electronic system connected to a pattern of electrical leads which is screen printed on a PET layer. The disc also incorporates an array of composite paraffingraphite wax valves which are opened using wirelessly-triggered Ohmic heating.