Abstract: According to one embodiment, a diagnostic device (8) for identifying a defect in an LED light string includes a probe (18) and a polarity selector switch (16). The LED light string includes a conductor provided within an insulation layer. The probe (18) is configured to penetrate the insulation layer and contact the conductor of an LED light string. The polarity selector switch (16) is electrically coupled to the probe (18) and configured to control the polarity of an electrical waveform provided to the probe (18).

Abstract: An integrated meter/timer comprises a plug adapted to be plugged into an electrical outlet connected to a power distribution circuit, a socket for receiving a plug from an electrical appliance, an electrical connection between the plug and the socket that includes a controllable switch for opening and closing the electrical connection to control the supplying of electrical power to the appliance, a current sensor coupled to the electrical connection for producing a signal representing the magnitude of electrical current flowing in the electrical connection, a microprocessor receiving the signal and producing a display signal representing a numerical value corresponding to the current magnitude, and a display coupled to the microprocessor for receiving the display signal for displaying the numerical value.

Abstract: A repair device for fixing a malfunctioning shunt across a failed filament in a light bulb in a group of series-connected miniature decorative bulbs includes a high-voltage pulse generator producing one or more pulses of a magnitude greater than the standard AC power line voltage. A connector receives the pulses from the pulse generator and supplies them to the group of series-connected miniature decorative bulbs. The pulse generator may be a piezoelectric pulse generator, a battery-powered electronic pulse generator, and/or an AC-powered electrical pulse generator.