Carnival tree eyes arduino automation

thingiverse

An eye moves smoothly, controlled by two servos powered by an Arduino controller. The dimension is approximately 150 millimeters in diameter. View a video of the moving eye at: http://youtu.be/dFKZuC5NHL0 Instructions These eyes are designed for use with two large carnival trees. Pupil and eyelid are constructed from papier-mache, although they can also be 3D printed. A solid wooden base plate serves as a foundation, onto which all the 3D-printed components can be screwed in place. The metal rod is 154 millimeters long and has a diameter of 6 millimeters. Eyelid servos utilize standard servo motors (Hitec HS-311), while pupil servos use smaller ones (Hitec HS-81). By linking the left and right eyes together using a small metal rod, only three servos are required to achieve full eye movement. A 5-volt Arduino Pro Mini is the sole electronic component necessary for piloting both eyes. The servos connect directly to Arduino pilot pins via yellow cable. The same 5-volt power supply can energize both the Arduino and the servos. An attached Arduino sketch includes detailed comments, allowing users to modify eye movement settings according to their preferences.