Here's an overview of the development process for my arduino, servo and 3D printing based animatronic heart mechanism, as well as a simpler version I made using a DC motor. This video is based on the build-log style posts I made to my Patreon page as I developed the designs.

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Downloads:
Instructions for these designs are not out yet, but check the blog post on the Nilheim Mechatronics website to get the files early: http://www.nilheim.co.uk/latest-proje...