Mattel Grogu Animatronic Upgrade

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madhephaestus

New Member
I have built an animatronic upgrade kit for the Mattel Grogu.

EDIT, original thread had it listed as Hasbro, it's actually Mattel.


Its made using a Pololu Rome base, and a Hephaestus Arm with an esp32 as the controller and a ZenDriver as the motor control base. The 3 robots are the ones used by the Robotics Engineering Department at WPI during the plague year.

More pictures and the build logs here: The Child: Animatronic hack of Baby Yoda plush toy

The esp32 hosts a wifi network and a small website that uses websockets for fast RC control on any phone.

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Me in my Jedi Robes with Grogu

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madhephaestus

New Member
Here is a more detailed build process for those interested.

The spine robot is the Hephaestus Arm, an open source 3d printed educational tool: Hephaestus-Arm/HephaestusArm2

The base is the ESP32 version of the Rome: WPIRoboticsEngineering/ZenRobotBuildKit

The RC over web stack is found in this Arduino Library i wrote and open sourced: WPIRoboticsEngineering/RBE1001Lib

The smart servos are now usable in Arduino thanks to the new library i wrote and open sourced: madhephaestus/lx16a-servo

The animation firmware is here: Halloween2020TheChild/FirmwareTheChild

Here is grogu, with his twin and the WPI Cosplay group at Halloween 2020

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Moving forward I wanted to make a fully animatronic head. I started by trying to re-cast the PVC head into silicone:

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But the mold cracked after the first run... so thats a bit of a dead end. I got one out of it to work with to design the of the mechs, but will need to go back to scratch for making the final molds.

Now I am working on upgrading the Grant Imahara Project 842 CAD models into printable molds. Project 842

Screenshot from 2021-04-30 10-57-40.png


The goal is to have the entire system be something that is open source and able to be produced by anyone with a 3d printer.
 
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madhephaestus

New Member
I have printed a set of Hand (glove?) molds!

IMG_20210514_130051.jpg


I used a vac chamber to pull the air out. The mode filled, but then began to leak causing the tips of the top two fingers to fail to fill.

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The issue came from the staircasing of the layers. I will try printing it in the other orientation to see if we can get a better mold seal.

Here are the files:

 

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