Patent ID: 7948227

Claim:
An electrical circuit diagnostic tool that is adapted to measure current in a circuit, comprising: first and second circuit measurement inputs; a manual switch for initiating a circuit testing routine; a microcontroller for running a circuit testing routine in response to activation of the manual switch by a user; an active circuit loading element operated under the control of the microcontroller during the circuit testing routine; a voltage measuring element; a current measuring element; and a display element; wherein the microcontroller adjusts the active circuit loading element during the circuit testing routine such that at least one of the voltage measuring element and the current measuring element iteratively measures a varying voltage or current, respectively; and wherein said first circuit measurement input is a pigtail-type lead, said second circuit measurement input is a metal probe, said switch is a momentary contact push-button, said display element is a multi-segment LED display or a multi-segment LCD display or other display device type, and said microcontroller determines, via the circuit testing routine, whether the measured circuit is capable of supplying a given minimum current at a given minimum voltage.