Multimeter with charging system
First Claim
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1. A multimeter, comprising:
- a main body;
two probes extending from the main body;
a battery unit arranged in the main body; and
a charging system arranged in the main body and configured for charging the battery unit, the charging system comprising;
a microcontroller;
an external input voltage sampling circuit electrically connected to the microcontroller, and configured for sampling an external input voltage from the probes;
a battery voltage sampling circuit electrically connected to the microcontroller, and configured for sampling a voltage of the battery unit; and
a voltage regulator circuit electrically connected the microcontroller, wherein the microcontroller compares the sampled external input voltage and the sampled voltage of the battery unit, and controls the voltage regulator circuit to regulate the external input voltage to be applicable to the battery unit based on the comparison.
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Abstract
A multimeter includes a main body, two probes extending from the main body, a battery unit arranged in the main body, and a charging system arranged in the main body and configured for charging the battery. The charging system includes a microcontroller with an external input voltage sampling circuit, a battery voltage sampling circuit and a voltage regulator circuit each electrically connected the microcontroller. The microcontroller compares sampled signals from the external input voltage sampling circuit and the battery voltage sampling circuit, and controls the voltage regulator circuit to regulate the external input voltage to be applicable to the battery based on the comparison.
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Citations
7 Claims
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1. A multimeter, comprising:
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a main body; two probes extending from the main body; a battery unit arranged in the main body; and a charging system arranged in the main body and configured for charging the battery unit, the charging system comprising; a microcontroller; an external input voltage sampling circuit electrically connected to the microcontroller, and configured for sampling an external input voltage from the probes; a battery voltage sampling circuit electrically connected to the microcontroller, and configured for sampling a voltage of the battery unit; and a voltage regulator circuit electrically connected the microcontroller, wherein the microcontroller compares the sampled external input voltage and the sampled voltage of the battery unit, and controls the voltage regulator circuit to regulate the external input voltage to be applicable to the battery unit based on the comparison. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification