| 摘要 |
A method and a device for monitoring a motor vehicle's electric power, in which the method comprises the steps of sampling, calculating, comparing, displaying results, and counting intervals, and the device comprises a stabilizing circuit, a CPU, a voltage sampling circuit, a current control circuit, and a color lamp display circuit. The step of sampling is performed when the load and power transistor are enabled (i.e., there is a great amount of current) and with a very short sampling time so that the invention can inform a driver about a status of a battery by consuming very little power.
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