Voice controlled lighting circuit

Shown is a sound-controlled lighting circuit. The piezoelectric ceramic piece B is used as a sound sensitive device. When it receives the clapping sound wave signal
, it outputs a corresponding electrical signal. The electrical signal passes through the high-voltage circuit composed of inverters 1, 2, and 3. After being amplified by the gain amplifier, it is output by the @ pin of inverter 3
, and then rectified by VD6 to make the input terminal of inverter 4 obtain a high level, and the inverter 4 outputs a low level. This low level is used as a trigger signal to make the dual
A flip occurs in a steady-state circuit. A bistable circuit
    is composed of inverters 5 and 6 , which has two stable states. These two stable states are obtained by connecting Ma and Rio. If the inverter 5 outputs a high level, the inverter 6 outputs a low level, and the thyristor vS is turned off because there is no trigger signal . At this time, the lighting lamp H goes out and does not light up.