Abstract: A system for monitoring a circuit, comprising a device under test, such as a power field effect transistor or capacitor, coupled to a power source and a signal source and configured to generate a power output using the signal source, a current output, a voltage output and an end of life detector coupled to the current output and the voltage output and configured to generate a first impedance as a function of the current output and the voltage output, to compare the first impedance to a second impedance and to generate an indicator if the first impedance exceeds the second impedance.

Abstract: The systems and methods described herein are for remaining useful life prediction in electronics and include measuring a plurality of circuit parameters for each of a plurality of circuit components at a plurality of different temperatures, determining a probability density function of failure as a function of time for each of the plurality of circuit components and combining the probability density functions for each of the plurality of circuit components as a function of a circuit that contains the plurality of circuit components.

Abstract: A system for monitoring a circuit, comprising a device under test, such as a power field effect transistor or capacitor, coupled to a power source and a signal source and configured to generate a power output using the signal source, a current output, a voltage output and an end of life detector coupled to the current output and the voltage output and configured to generate a first impedance as a function of the current output and the voltage output, to compare the first impedance to a second impedance and to generate an indicator if the first impedance exceeds the second impedance.

Abstract: A portable light may comprise: a light body for receiving a source of electrical power; a light source for producing light when energized; and a switch assembly for selectively coupling the source of electrical power with said light source for energizing the light source to produce light. The portable light may have a light head and a pivot assembly including a pivotable joint for pivoting the light head towards and away from the light body and a rotatable joint for rotating the light head relative to the light body; and/or may have a handle assembly coupled to the light body by a handle pivot so as to be pivotable away from and toward the light body. A releasable latch assembly that retains the handle housing adjacent the light body may be provided.