Liquid detection circuit and electronic device

Abstract

The application provides a liquid detection circuit and electronic device. The liquid detection circuit comprises: a reference capacitor, a digital logic circuit master chip, a first resistor, a second resistor and a pull-up resistor. The digital logic circuit master chip comprises a comparison unit and a counting unit. The comparison unit comprises a reference voltage input, a sampling signal input, a first comparison signal output, a second comparison signal output, a third comparison signal output and a fourth comparison signal output. The counting unit is used to count the first level signal collected by the first signal acquisition end and the second signal acquisition end respectively. When the counting unit outputs the second level signal, it is confirmed that there is liquid in the measured end. This application can effectively determine the liquid at the interface and reduce the probability of short circuits.

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