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This Kit only contains mechanical...
Electronic brick of microphone can be connected to the analog I / O port, when speaking to the microphone, the analog value will be changed. A recorder can be made by reading and saving the analog value.
The Grove - Speaker is a module consist of power amplification and voice outputs
This is the latest version of grove - recorder v3.0 and is based on ISD1820P. It can record 8 ~ 20 seconds by choosing the resistance and playback cycle.