Abstract: Disclosed is a method of making an LED light bulb using a plurality of surface mount light emitting diodes mounted on a variety of semiregular polyhedrons and optimizing the number and placement of the surface mount light emitting diodes for the widest lighting angle (to achieve as close to 360-degrees in three dimensions) with a heat sink matched to the thermal output of the surface mount light emitting diodes and the heat conductive capacity of the polyhedron. Also described are a light emitting diode light bulb made using a plurality of surface mount light emitting diodes mounted on a variety of semiregular polyhedrons. Some embodiments may include a heat conductor comprising a plurality of curved-T shaped heat fins.

Abstract: A continuity tester specifically for tracing wiring and circuit paths on electronic printed circuit board assemblies that will not harm semiconductors or respond to resistances of more than a few ohms. The invention electronically divides the probe voltage down to less than 0.25 volts so that semiconductors cannot be biased into conduction when probed resulting in zero induced test current through them. A low impedance input responses to low resistance wiring continuity only, eliminating false responses that can be caused by measuring through a component. A grounding means is provided to prevent damage from static electric discharges by connecting the probes through a high value resistor to workstation ground.