He’s using an Arduino with a custom sound sensor, a single servo, a box, and a folder paper mouth. Building a single servo robot shouldn’t be that much of a challenge, we’ve even seen ...

Building an animatronic robot is one thing ... To do this in Arduino/C code, a new intermediate position for the servo is specified for each main loop until it reaches the final position.

Pictured is FLUID, an open-source, 3D-printed robot - it uses an Arduino Mega in the service of advanced robotics.