Mobile phones are about 0.5 inch antennas and older police radios are 2.86 inches. For a good spectrum coverage if you make antennas of 0.5, 1.0, 1.5, 2.0, 2.5 and 3.0 inches most of the usable spectrum will be covered. Connect the antenna(s) that you mad

Some drones offer advanced flight controller applications that run on a smartphone or tablet. The Parrot AR Drone 2.0 works exclusively with their tablet application. Here is the Parrot AR drone control interface. Credit: Courtesy of Andrew Amato Parrot??

To make a drone, you'll need some model wood, metal, or plastic for the frame, as well as the electrical components, which include motors, propellers, speed controllers, a flight controller, and a power distribution board. Once you have your supplies,