1, this as long as the voice-controlled switch on the basis of a voice chip (to customize your \"light\" and \"light off\" voice chip), and then use a recognition circuit to compare with your voice at the same time output control signals.
2, this also has a voice-controlled sampling circuit, that is, the analog-to-digital circuit.
3, the components are not many, but to be successfully debuted into a circuit diagram, and then made into a circuit board, but also a shell
I hope my answer can help you