| 摘要 |
Low-cost, miniature, noninvasive power and continuity testing tools for diagnosing and troubleshooting electrical and electronic systems. The tools may be used to diagnose the condition of electrical equipment such as power cords, ignition wires, and ignition systems. Certain tools do not require a power source to operate, while others are battery powered. One tool comprises a liquid crystal display and an antenna connected a LCD element of the display. RF energy radiated by a tested circuit is sensed by the antenna and is coupled to the LCD element which causes the element to emit light. Another tool comprises a battery, a light emitting diode, and a semiconductor integrated circuit switch. The light emitting diode and integrated circuit switch are coupled in series with the battery. The integrated circuit switch is closed when it is in the presence of RF energy, which completes the circuit and turns on the light emitting diode. In addition, a light amplifying light pipe may be used to cover the light emitting diode which amplifies its light output. Another tool comprises a continuity testing tool comprising a battery and a light emitting diode connected in series between first and second electrical contacts. A light amplifying light pipe surrounds the light emitting diode for amplifying the light output thereof.
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