Sound-controlled electric fan speed control circuit and cricket sound control circuit

As shown in the figure, the circuit includes a voice-activated sensor, an audio amplifier, a monostable trigger circuit, a pulse counting/distribution circuit, a thyristor control speed regulation circuit, a cricket sound circuit, an AC step-down rectifier circuit, etc. The circuit adopts a burst (such as fist bump, password) voice control method, which can carry out three-speed wind speed control and stop control. When the fan blows, there is also a cool cricket chirp, which has strong anti-interference characteristics.