I wanted to add face tracking to the robot so it could follow a person around the house. I added an ESP32-CAM camera module, mounted with 3d printed parts and connected via cables to serial on the Arduino Nano on the Robot.
Will Cogley, known for his awesome animatronics, has created a robotic mouth that’s already a work of art and could form the basis of something even more amazing.
The device features an array of servo mechanisms to actuate its jaw, forceps, cheeks, and a tongue. The cheek assemblies are particularly interesting, employing two servos each and a linkage system that allows it to move in a variety of positions.
For control, the project uses a Python program to break typed sentences up into individual sounds. It then sends these to an Arduino, which poses the mouth in sequence. Cogley has also experimented with microphone input and hopes to explore motion capture with it in the future.
If you’d like to build your own vaguely humanoid robot, but don’t care about it getting around, then look no farther than Aster.
The 3D-printed bot is controlled by an Arduino Uno, with a servo shield to actuate its 16 servo motors. This enables it to move its arms quite dramatically as seen in the video below, along with its head. The legs also appear to be capable of movement, though not meant to walk, and is supported with a column in the middle of its structure.
Aster’s head display is made out of an old smartphone, and in the demo it shows its eyes as green geometric objects, an animated sketch, and then, somewhat shockingly, as different humans. Print files for the project are available here and the design is actually based on the more expensive Poppy Humanoid.
The droid scoots around on what appears to be one large wheel, which conceals the Arduino boards as well as other electronics, batteries, and mechanical components. Denton’s wheel design is a bit more complicated mechanically than it first appears, as its split into a center section, with thin drive wheels on the side that enable differential steering.
On top, a cone-shaped head provides sounds and movement, giving the little RC D-O a ton of personality. The droid isn’t quite finished as of the video below, but given how well it works there, the end product should be amazing!
The project uses the kit’s DC motors for traversing the cable, with O-rings that normally form the tires taken off in order to grip the top of a paracord. Everything is controlled by an Arduino Uno and a motor shield, while a Bluetooth module provides wireless connectivity. Control is via an iPad app, which simply rotates both motors at the same time as needed.
Since the parts are all modular, Reeves is planning on adding a few other attachments including a GoPro camera mount and perhaps even a servo that lets him drop a payload like a water balloon from it.
Alexander Weber has a nice build log on his drawbot called Mechpen, that is available on GitHub:
This is Mechpen, my newest drawbot.
The idea was to have a robot arm that could sketch on a rather large surface.
It is a SCARA (Selective Compliance Assembly Robot Arm) robot arm, meaning the robot has a shoulder and an elbow joint and a hand. Mechpen has a reach of 140 cm which means it could sketch up to A0 format.