Voltage detection circuit

Abstract

The invention relates to a voltage detection circuit which is used for detecting voltage of a power supply. The voltage detection circuit comprises a micro control unit, a voltage booster circuit, a plurality of divider resistors, wherein the micro control unit comprises a universal input / output port and a control input / output port. The voltage detection circuit utilizes fixed voltage provided by the voltage booster circuit, and the divider resistors generate judgment voltage according to the fixed voltage and the voltage of the power supply. The universal input / output port generates a digital potential signal according to the judgment voltage to enable the micro control unit to promote the state of the power supply voltage according to the digital potential signal. The voltage detection circuit achieves the efficacy of the detection circuit by utilizing pure serial and parallel connection of the divider resistors, has simple circuit and small volume, can increase promotion signals aiming at demands of users to further control the power supply, and has low cost most importantly.

Description

technical field [0001] The invention relates to a voltage circuit, in particular to a voltage detection circuit with a detectable voltage range. Background technique [0002] Due to the gradual increase in environmental protection awareness in recent years, exhausted batteries must be recycled and cannot be discarded at will. The reason is that the battery fluid in the battery is toxic and corrosive. When the battery that cannot provide power is still installed in the electronic device, The weak power remaining in the battery will be consumed slowly, and after all the power is completely exhausted, the battery fluid will flow out of the battery and corrode the electronic circuits inside the electronic device. Most users usually discard corroded electronic devices and batteries, and when the battery liquid overflows the electronic device, the battery liquid will cause serious pollution to the environment. Therefore, most electronic devices using batteries on the market are e...

AI Technical Summary

Problems solved by technology

However, although the analog / digital converter has a powerful judgment function, the complexity of its circuit can be imagined, and the cost of the analog / digital converter is also considerable

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