Voice-controlled music socket circuit using NJM2072D (1)

As shown in the figure, the circuit is composed of an acoustic sensor, a voice-activated integrated circuit, a relay control circuit, a music sound circuit, and an AC step-down rectifier circuit. It can be used for voice-controlled automatic lighting, voice-controlled music fountains, voice-controlled roadblock indicators, and voice-controlled automatic doors. wait. ICl uses the voice-activated special integrated circuit NJM2072D, which is the core device of the circuit. Its internal circuit functional block diagram is shown in the figure below.