The Doorman - Eyeball with ball joint

thingiverse

Following modification implemented: * A built-in ball joint socket is installed in the eyeball. * The main eye holder frame has been improved to support the eyeball ball joint, with screw mount holes for a [SG90 servo](https://www.aliexpress.com/store/product/Motor-Stepper-Servo-Robot-Shield-for-Arduino-I2C-v2-Kit-w-PWM-Driver-TOP/612195_32243209515.html?spm=2114.12010615.8148356.1.1d4b85f2K92qHx). * Lighted eyeballs feature 2x5mm [clear white LEDs](https://www.aliexpress.com/store/product/100Pcs-F5-5MM-White-Color-White-Light-Round-Superbright-LED-Lamp/612195_1852090868.html?spm=2114.12010615.8148356.28.6acc546ahCe7tE) and a 220 ohm resistor. * An Arduino Nano and expansion shield are mounted for control. * A HW-1004 or AM312 mini PIR sensor is installed inside the nostril. * An LM2596 buck converter provides a 5V power supply, eliminating the need for an additional capacitor. An optional DC Power supply jack is also available. [Demo1](https://youtu.be/JIThpATz7jM) and [Demo2](https://youtu.be/QgR6jgbbOzE) showcase the robot's capabilities. To ensure smooth movement, apply a thin layer of silicone lubricating grease to the eyeball ball joint. The control rod is made from carbon steel wire.