Build Your Child Their Very Own Node js Frozen Robot
summary
A voice‑activated Frozen doll listens for the words Elsa, Frozen or sing and plays a Let It Go snippet; the build uses an Arduino + MP3 shield to store and output audio, a host Node process that records audio with node-record and talks to the microcontroller over serialport, and speech recognition via Microsoft Cognitive Services (reported ~99.9% accuracy versus ~60–70% from a tested Google endpoint). The device is an illusion—recording and recognition run on the host—but the demo generally works despite occasional glitches.
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