Baby bedwetting voice alarm circuit

Its main component is a sensor
that detects feces wetness . Usually when the baby is not wet with feces , the sensor has no signal, VT1 and VT2 are cut off, and the PE trigger end of ICI does not work. At this time, press the recording button, the light-emitting diodes l and ED will light up, and the microphone will be recorded immediately for 8 to 20 seconds. When the light-emitting diode goes out, release the handle and the voice content will be recorded into the chip. If you want to change to other content, just press the recording button, the previous content will disappear and you can record again.     When a baby pees, the urine is a conductor, turning the sensor on. The +3V voltage is amplified by a composite tube composed of resistor R, diode VD, and transistors VT1 and VT2 . The collector output voltage of VT2 controls the PE terminal of the voice chip. Trigger the content stored in ISD1810. Use the SPl+ and SPl- outputs to make sounds for the speakers to remind family members to change their children's diapers.