Here’s another neat Arduino helicopter project featuring four infrared sensors and one ultrasonic sensor for obstacle avoidance.  We’ve seen an Arduino powered helicopter with four rotors and even one with six rotors too.  This quadcopter, however, features superb stability and obstacle avoidance.  It’s precise distance sensing makes this four rotor drone ideal for indoor flights.

video after the break

via [hack’n’mode] source [DIYDrones]