Picture of Stepper Motor + Arduino + Solar Tracker (EV) 太陽能追蹤器 #Arduino
Build an Arduino "sonar" with a servo and an ultrasound rangefinder, then displaying it with Processing.
Face tracking with Arduino, Processing and OpenCV | Let's Make Robots!
Picture of Face detection and tracking with Arduino and OpenCV
Picture of Voice Activated Arduino (Bluetooth + Android) http://www.instructables.com/id/Voice-Activated-Arduino-Bluetooth-Android/
Controlling a ton of servos – TLC5940 + Arduino
11 Arduino projects that require major hacking skills—or a bit of insanity | Ars Technica
Arduino 101: Potentiometers and Servos DIY How-to from Make: Projects
Serial Connection between Rasperry Pi and Arduino - #electronics #maker
Tutorial for an Arduino-based metal detector. Says it can detect a coin at a depth of 15cm. Seems more reliable than the other tutorial I found.