Neelay KamatShridhar Kamat
Published © GPL3+

Alexa Automated Babysitter

The Automated babysitter is a device to help parents to monitor and provide a soothing experience to their baby.

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Things used in this project

Hardware components

Echo Dot
Amazon Alexa Echo Dot
Mindstorms EV3 Programming Brick / Kit
LEGO Mindstorms EV3 Programming Brick / Kit
EV3 large motor
The EV3 Large Servo Motor is a powerful motor that uses tacho feedback for precise control to within one degree of accuracy. By using the built-in rotation sensor, the intelligent motor can be made to align with other motors on the robot so that it can drive in a straight line at the same speed. It can also be used to give an accurate reading for experiments. The motor case design also makes it easy to assemble gear trains.
EV3 Medium Motor
The EV3 Medium Servo Motor is great for lower-load, higher speed applications and when faster response times and a smaller profile are needed in the robot’s design. The motor uses tacho feedback for precise control within one degree of accuracy and has a built-in rotation sensor.
EV3 Sound Sensor
the Sound Sensor allows your LEGO® MINDSTORMS® NXT robot to hear! The Sound Sensor is able to measure noise levels in both dB (decibels) and dBA (frequencies around 36 kHz where the human ear is most sensitive), as well as recognize sound patterns and identify tone differences.
Ev3 Ultrasonic Sensor
The digital EV3 Ultrasonic Sensor generates sound waves and reads their echoes to detect and measure distance from objects. It can also send single sound waves to work as sonar or listen for a sound wave that triggers the start of a program
Lego Technic parts
LEGO® Technic™ provides a challenge for experienced LEGO builders. Your child can build advanced, real-life functions like gearboxes and steering systems.
EV3 cable pack
RJ12 Connector Cables used to connect the motors and sensors to the EV3 brick

Software apps and online services

Alexa Skills Kit
Amazon Alexa Alexa Skills Kit
Visual Studio 2017
Microsoft Visual Studio 2017


Read more

Custom parts and enclosures

Alexa-ABS Framework

This is the entire layout of the project


Rocking motion

Mechanism to create rocking motion from the circulatory motion of the large motor



The entire Python code to control the EV3 and the Java code to run the skills on Alexa is hosted on Github


Neelay Kamat

Neelay Kamat

2 projects • 0 followers
Shridhar Kamat

Shridhar Kamat

1 project • 0 followers
Thanks to Saieesh Gandhi, Pramod Maurya, Terren Peterson, SaiPranav Gandhi, Siddharaj Mopkar, and Aparna Gandhi.