Electric leakage alarm circuit for electric equipment

The invention discloses an electric leakage alarm circuit for electric equipment, and the circuit comprises a trigger chip, a buzzer, a current-limiting resistor, and a reset button which is connectedbetween a power supply and the trigger chip to complete the reset of a trigger. The current-limiting resistor and the light-emitting diode play a role in indicating a power supply; the buzzer is connected with an output pin of the integrated trigger chip and is used for alarming and prompting. According to the circuit, the input high impedance characteristic of the trigger chip is utilized, the voltage of the input pin is sensed to trigger the output end to output high level to drive the buzzer to give an alarm, and the circuit is simple in design, low in cost and suitable for electric leakage detection of electric equipment in a narrow working area. 本发明公开了一种用电设备漏电报警电路，该电路包括触发器芯片、蜂鸣器、限流电阻以及复位按钮，复位按钮接在供电电源和触发器芯片之间完成触发器的复位；限流电阻与发光二极管起到电源指示作用，蜂鸣器与集成触发芯片输出引脚连接用于警报提示；本电路利用触发器芯片的输入高阻抗特性，感应输入引脚的用电压来触发输出端输出高电平驱动蜂鸣器报警，本电路