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Making a spooky Alexa mask #Alexa #Arduino

wattnotions presents an animatronic mask made by Keith Colton for the 2019 Dublin Maker Faire. The post documents the assembly and the electronics used.

An Amazon Echo Dot is connected to the mask. The Echo Dot has a 3.5mm aux output. This output is fed into a circuit that amplifies the signal into a 0-5V range suitable for the ADC on an Arduino. This circuit also contains an analog envelope detector circuit. The output of the envelope detector is what gets fed into the ADC of the Arduino.

See the details here and the video below.


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1 Comment

  1. I saw they tried to use ultrasonics to track a person with the eyes but it was too noisy. Since the light ring on an echo lights up toward the source of the voice, maybe sensing the light around the ring or hacking the insides and taping off the leds in the ring, one could use that to point the face or eyes toward the voice.

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